./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0232-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0232-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P --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 1228d922512a0e9364273220ccc1e5afc3bfb7c0e22f10439a1ba902492e71b2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:25:05,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:25:05,762 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:25:05,799 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:25:05,799 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:25:05,801 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:25:05,803 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:25:05,805 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:25:05,807 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:25:05,809 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:25:05,810 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:25:05,811 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:25:05,812 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:25:05,813 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:25:05,815 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:25:05,817 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:25:05,818 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:25:05,819 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:25:05,821 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:25:05,824 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:25:05,826 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:25:05,827 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:25:05,829 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:25:05,830 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:25:05,834 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:25:05,834 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:25:05,835 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:25:05,836 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:25:05,837 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:25:05,838 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:25:05,838 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:25:05,839 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:25:05,841 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:25:05,842 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:25:05,843 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:25:05,843 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:25:05,844 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:25:05,845 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:25:05,845 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:25:05,846 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:25:05,847 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:25:05,848 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-21 01:25:05,878 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:25:05,878 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:25:05,878 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:25:05,879 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:25:05,879 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:25:05,879 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:25:05,880 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:25:05,880 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:25:05,880 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:25:05,880 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:25:05,880 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:25:05,881 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:25:05,881 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:25:05,881 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:25:05,881 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:25:05,881 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:25:05,882 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:25:05,882 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:25:05,882 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-21 01:25:05,883 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-21 01:25:05,883 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:25:05,883 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:25:05,883 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 01:25:05,883 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:25:05,883 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:25:05,884 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:25:05,884 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-21 01:25:05,884 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-21 01:25:05,884 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-21 01:25:05,884 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:25:05,885 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-21 01:25:05,885 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:25:05,885 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:25:05,885 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:25:05,885 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:25:05,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:25:05,886 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:25:05,886 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:25:05,886 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:25:05,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:25:05,886 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:25:05,887 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:25:05,887 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_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1228d922512a0e9364273220ccc1e5afc3bfb7c0e22f10439a1ba902492e71b2 [2021-11-21 01:25:06,131 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:25:06,152 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:25:06,155 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:25:06,156 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:25:06,157 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:25:06,159 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/memsafety/test-0232-1.i [2021-11-21 01:25:06,241 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/data/da656735f/3ab841af8eb04cd88a3d22ec4bb9845d/FLAGd02de36f0 [2021-11-21 01:25:06,755 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:25:06,756 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/sv-benchmarks/c/memsafety/test-0232-1.i [2021-11-21 01:25:06,770 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/data/da656735f/3ab841af8eb04cd88a3d22ec4bb9845d/FLAGd02de36f0 [2021-11-21 01:25:07,065 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/data/da656735f/3ab841af8eb04cd88a3d22ec4bb9845d [2021-11-21 01:25:07,067 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:25:07,069 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:25:07,070 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:25:07,071 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:25:07,086 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:25:07,087 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:25:07" (1/1) ... [2021-11-21 01:25:07,089 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a3e14bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:07, skipping insertion in model container [2021-11-21 01:25:07,089 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:25:07" (1/1) ... [2021-11-21 01:25:07,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:25:07,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:25:07,444 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:25:07,456 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:25:07,519 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:25:07,565 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:25:07,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:07 WrapperNode [2021-11-21 01:25:07,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:25:07,566 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:25:07,567 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:25:07,567 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:25:07,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:07" (1/1) ... [2021-11-21 01:25:07,608 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:07" (1/1) ... [2021-11-21 01:25:07,630 INFO L137 Inliner]: procedures = 126, calls = 32, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 81 [2021-11-21 01:25:07,631 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:25:07,632 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:25:07,632 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:25:07,632 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:25:07,640 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:07" (1/1) ... [2021-11-21 01:25:07,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:07" (1/1) ... [2021-11-21 01:25:07,644 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:07" (1/1) ... [2021-11-21 01:25:07,644 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:07" (1/1) ... [2021-11-21 01:25:07,651 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:07" (1/1) ... [2021-11-21 01:25:07,655 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:07" (1/1) ... [2021-11-21 01:25:07,657 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:07" (1/1) ... [2021-11-21 01:25:07,660 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:25:07,661 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:25:07,661 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:25:07,661 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:25:07,662 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:07" (1/1) ... [2021-11-21 01:25:07,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:25:07,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:25:07,693 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:25:07,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:25:07,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:25:07,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:25:07,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:25:07,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:25:07,759 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:25:07,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:25:07,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 01:25:07,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:25:07,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:25:07,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:25:07,858 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:25:07,859 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:25:08,183 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:25:08,236 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:25:08,240 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-21 01:25:08,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:25:08 BoogieIcfgContainer [2021-11-21 01:25:08,248 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:25:08,250 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:25:08,250 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:25:08,253 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:25:08,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:25:07" (1/3) ... [2021-11-21 01:25:08,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1813690f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:25:08, skipping insertion in model container [2021-11-21 01:25:08,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:07" (2/3) ... [2021-11-21 01:25:08,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1813690f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:25:08, skipping insertion in model container [2021-11-21 01:25:08,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:25:08" (3/3) ... [2021-11-21 01:25:08,257 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0232-1.i [2021-11-21 01:25:08,262 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:25:08,263 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 41 error locations. [2021-11-21 01:25:08,321 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:25:08,327 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:25:08,328 INFO L340 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2021-11-21 01:25:08,343 INFO L276 IsEmpty]: Start isEmpty. Operand has 73 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 72 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:08,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-21 01:25:08,350 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:08,351 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-21 01:25:08,351 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-21 01:25:08,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:08,357 INFO L85 PathProgramCache]: Analyzing trace with hash 147227, now seen corresponding path program 1 times [2021-11-21 01:25:08,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:08,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401814670] [2021-11-21 01:25:08,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:08,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:08,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:08,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:08,545 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:08,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401814670] [2021-11-21 01:25:08,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401814670] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:08,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:25:08,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:25:08,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602715374] [2021-11-21 01:25:08,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:08,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:25:08,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:08,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:25:08,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:25:08,587 INFO L87 Difference]: Start difference. First operand has 73 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 72 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:08,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:08,762 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2021-11-21 01:25:08,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:25:08,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-21 01:25:08,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:08,783 INFO L225 Difference]: With dead ends: 83 [2021-11-21 01:25:08,783 INFO L226 Difference]: Without dead ends: 82 [2021-11-21 01:25:08,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:25:08,792 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 124 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:08,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 38 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:25:08,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-21 01:25:08,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 64. [2021-11-21 01:25:08,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 31 states have (on average 2.161290322580645) internal successors, (67), 63 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:08,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2021-11-21 01:25:08,829 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 3 [2021-11-21 01:25:08,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:08,829 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2021-11-21 01:25:08,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:08,830 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2021-11-21 01:25:08,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-21 01:25:08,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:08,830 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-21 01:25:08,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:25:08,831 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-21 01:25:08,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:08,832 INFO L85 PathProgramCache]: Analyzing trace with hash 147228, now seen corresponding path program 1 times [2021-11-21 01:25:08,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:08,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393234630] [2021-11-21 01:25:08,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:08,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:08,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:08,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:08,914 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:08,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393234630] [2021-11-21 01:25:08,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393234630] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:08,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:25:08,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:25:08,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752274609] [2021-11-21 01:25:08,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:08,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:25:08,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:08,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:25:08,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:25:08,918 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:09,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:09,253 INFO L93 Difference]: Finished difference Result 132 states and 139 transitions. [2021-11-21 01:25:09,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:25:09,256 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-21 01:25:09,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:09,258 INFO L225 Difference]: With dead ends: 132 [2021-11-21 01:25:09,259 INFO L226 Difference]: Without dead ends: 132 [2021-11-21 01:25:09,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:25:09,261 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 118 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:09,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 71 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:25:09,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-21 01:25:09,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 67. [2021-11-21 01:25:09,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 66 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:09,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2021-11-21 01:25:09,280 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 3 [2021-11-21 01:25:09,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:09,281 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2021-11-21 01:25:09,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:09,281 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2021-11-21 01:25:09,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-21 01:25:09,282 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:09,282 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-21 01:25:09,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:25:09,282 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-21 01:25:09,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:09,283 INFO L85 PathProgramCache]: Analyzing trace with hash 4564017, now seen corresponding path program 1 times [2021-11-21 01:25:09,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:09,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094987857] [2021-11-21 01:25:09,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:09,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:09,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:09,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:09,348 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:09,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094987857] [2021-11-21 01:25:09,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094987857] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:09,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:25:09,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:25:09,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618753299] [2021-11-21 01:25:09,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:09,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:25:09,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:09,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:25:09,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:25:09,356 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:09,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:09,452 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2021-11-21 01:25:09,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:25:09,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-21 01:25:09,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:09,461 INFO L225 Difference]: With dead ends: 73 [2021-11-21 01:25:09,461 INFO L226 Difference]: Without dead ends: 73 [2021-11-21 01:25:09,461 INFO L932 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 [2021-11-21 01:25:09,463 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 42 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:09,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 42 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:25:09,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-21 01:25:09,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2021-11-21 01:25:09,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 62 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:09,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2021-11-21 01:25:09,472 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 4 [2021-11-21 01:25:09,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:09,472 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2021-11-21 01:25:09,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:09,477 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2021-11-21 01:25:09,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-21 01:25:09,477 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:09,477 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-21 01:25:09,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:25:09,478 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-21 01:25:09,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:09,480 INFO L85 PathProgramCache]: Analyzing trace with hash 4564018, now seen corresponding path program 1 times [2021-11-21 01:25:09,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:09,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476017185] [2021-11-21 01:25:09,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:09,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:09,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:09,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:09,547 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:09,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476017185] [2021-11-21 01:25:09,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476017185] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:09,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:25:09,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:25:09,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960227180] [2021-11-21 01:25:09,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:09,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:25:09,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:09,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:25:09,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:25:09,550 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:09,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:09,602 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2021-11-21 01:25:09,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:25:09,603 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-21 01:25:09,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:09,603 INFO L225 Difference]: With dead ends: 60 [2021-11-21 01:25:09,604 INFO L226 Difference]: Without dead ends: 60 [2021-11-21 01:25:09,604 INFO L932 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 [2021-11-21 01:25:09,606 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 51 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:09,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 27 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:25:09,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-21 01:25:09,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-11-21 01:25:09,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 58 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:09,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2021-11-21 01:25:09,624 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 4 [2021-11-21 01:25:09,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:09,624 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2021-11-21 01:25:09,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:09,624 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2021-11-21 01:25:09,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:25:09,625 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:09,625 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:25:09,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:25:09,625 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-21 01:25:09,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:09,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1702802726, now seen corresponding path program 1 times [2021-11-21 01:25:09,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:09,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872840009] [2021-11-21 01:25:09,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:09,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:09,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:09,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:09,780 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:09,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872840009] [2021-11-21 01:25:09,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872840009] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:09,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:25:09,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:25:09,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81974991] [2021-11-21 01:25:09,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:09,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:25:09,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:09,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:25:09,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:25:09,783 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:09,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:09,971 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2021-11-21 01:25:09,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:25:09,972 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-21 01:25:09,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:09,975 INFO L225 Difference]: With dead ends: 67 [2021-11-21 01:25:09,979 INFO L226 Difference]: Without dead ends: 67 [2021-11-21 01:25:09,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:25:09,989 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 11 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:09,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 230 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:25:09,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-21 01:25:09,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2021-11-21 01:25:09,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 43 states have (on average 1.627906976744186) internal successors, (70), 63 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:09,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2021-11-21 01:25:09,996 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 8 [2021-11-21 01:25:09,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:09,997 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2021-11-21 01:25:09,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:09,997 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2021-11-21 01:25:09,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:25:09,998 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:09,998 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:25:09,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:25:09,999 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-21 01:25:09,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:09,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1702814487, now seen corresponding path program 1 times [2021-11-21 01:25:10,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:10,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708675309] [2021-11-21 01:25:10,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:10,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:10,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:10,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:10,092 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:10,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708675309] [2021-11-21 01:25:10,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708675309] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:10,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:25:10,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:25:10,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043847618] [2021-11-21 01:25:10,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:10,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:25:10,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:10,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:25:10,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:25:10,095 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:10,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:10,213 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2021-11-21 01:25:10,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:25:10,213 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-21 01:25:10,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:10,214 INFO L225 Difference]: With dead ends: 72 [2021-11-21 01:25:10,214 INFO L226 Difference]: Without dead ends: 72 [2021-11-21 01:25:10,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:25:10,216 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 221 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:10,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 25 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:25:10,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-21 01:25:10,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 61. [2021-11-21 01:25:10,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 41 states have (on average 1.6341463414634145) internal successors, (67), 60 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:10,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2021-11-21 01:25:10,231 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 8 [2021-11-21 01:25:10,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:10,232 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2021-11-21 01:25:10,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:10,232 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2021-11-21 01:25:10,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 01:25:10,233 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:10,233 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:25:10,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 01:25:10,234 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-21 01:25:10,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:10,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1766066188, now seen corresponding path program 1 times [2021-11-21 01:25:10,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:10,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561838913] [2021-11-21 01:25:10,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:10,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:10,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:10,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:10,338 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:10,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561838913] [2021-11-21 01:25:10,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561838913] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:10,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:25:10,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:25:10,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092547012] [2021-11-21 01:25:10,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:10,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:25:10,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:10,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:25:10,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:25:10,340 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:10,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:10,485 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2021-11-21 01:25:10,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:25:10,486 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-21 01:25:10,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:10,487 INFO L225 Difference]: With dead ends: 69 [2021-11-21 01:25:10,488 INFO L226 Difference]: Without dead ends: 69 [2021-11-21 01:25:10,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:25:10,490 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 116 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:10,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 53 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:25:10,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-21 01:25:10,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2021-11-21 01:25:10,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 59 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:10,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-11-21 01:25:10,502 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 13 [2021-11-21 01:25:10,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:10,502 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-11-21 01:25:10,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:10,502 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-11-21 01:25:10,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 01:25:10,503 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:10,503 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:25:10,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 01:25:10,503 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-21 01:25:10,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:10,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1766066189, now seen corresponding path program 1 times [2021-11-21 01:25:10,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:10,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053869226] [2021-11-21 01:25:10,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:10,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:10,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:10,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:10,677 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:10,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053869226] [2021-11-21 01:25:10,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053869226] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:10,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:25:10,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:25:10,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764156621] [2021-11-21 01:25:10,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:10,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:25:10,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:10,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:25:10,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:25:10,680 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:10,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:10,798 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2021-11-21 01:25:10,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:25:10,801 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-21 01:25:10,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:10,801 INFO L225 Difference]: With dead ends: 71 [2021-11-21 01:25:10,802 INFO L226 Difference]: Without dead ends: 71 [2021-11-21 01:25:10,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:25:10,803 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 147 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:10,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 58 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:25:10,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-21 01:25:10,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 59. [2021-11-21 01:25:10,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.5853658536585367) internal successors, (65), 58 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:10,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2021-11-21 01:25:10,808 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 13 [2021-11-21 01:25:10,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:10,808 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2021-11-21 01:25:10,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:10,809 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2021-11-21 01:25:10,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-21 01:25:10,810 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:10,810 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:25:10,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 01:25:10,810 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-21 01:25:10,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:10,811 INFO L85 PathProgramCache]: Analyzing trace with hash 677583434, now seen corresponding path program 1 times [2021-11-21 01:25:10,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:10,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557826248] [2021-11-21 01:25:10,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:10,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:10,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:10,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:10,914 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:10,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557826248] [2021-11-21 01:25:10,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557826248] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:10,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:25:10,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:25:10,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732812380] [2021-11-21 01:25:10,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:10,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:25:10,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:10,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:25:10,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:25:10,916 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:10,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:10,999 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2021-11-21 01:25:10,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:25:11,000 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-21 01:25:11,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:11,000 INFO L225 Difference]: With dead ends: 70 [2021-11-21 01:25:11,001 INFO L226 Difference]: Without dead ends: 70 [2021-11-21 01:25:11,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:25:11,002 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 89 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:11,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 58 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:25:11,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-21 01:25:11,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 58. [2021-11-21 01:25:11,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 41 states have (on average 1.5609756097560976) internal successors, (64), 57 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:11,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2021-11-21 01:25:11,007 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 15 [2021-11-21 01:25:11,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:11,007 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2021-11-21 01:25:11,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:11,007 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2021-11-21 01:25:11,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-21 01:25:11,008 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:11,008 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:25:11,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 01:25:11,008 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-21 01:25:11,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:11,009 INFO L85 PathProgramCache]: Analyzing trace with hash 697691972, now seen corresponding path program 1 times [2021-11-21 01:25:11,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:11,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411104121] [2021-11-21 01:25:11,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:11,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:11,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:11,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:11,058 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:11,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411104121] [2021-11-21 01:25:11,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411104121] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:11,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:25:11,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:25:11,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057941886] [2021-11-21 01:25:11,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:11,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:25:11,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:11,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:25:11,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:25:11,060 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:11,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:11,154 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2021-11-21 01:25:11,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:25:11,155 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-21 01:25:11,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:11,155 INFO L225 Difference]: With dead ends: 53 [2021-11-21 01:25:11,156 INFO L226 Difference]: Without dead ends: 53 [2021-11-21 01:25:11,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:25:11,159 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 52 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:11,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 62 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:25:11,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-21 01:25:11,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-21 01:25:11,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 52 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:11,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2021-11-21 01:25:11,166 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 15 [2021-11-21 01:25:11,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:11,166 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2021-11-21 01:25:11,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:11,166 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2021-11-21 01:25:11,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-21 01:25:11,167 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:11,168 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:25:11,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 01:25:11,168 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-21 01:25:11,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:11,169 INFO L85 PathProgramCache]: Analyzing trace with hash -469749928, now seen corresponding path program 1 times [2021-11-21 01:25:11,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:11,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999484064] [2021-11-21 01:25:11,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:11,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:11,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:11,247 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:11,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999484064] [2021-11-21 01:25:11,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999484064] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:11,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:25:11,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:25:11,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795486333] [2021-11-21 01:25:11,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:11,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:25:11,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:11,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:25:11,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:25:11,249 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:11,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:11,338 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-11-21 01:25:11,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:25:11,339 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-21 01:25:11,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:11,339 INFO L225 Difference]: With dead ends: 52 [2021-11-21 01:25:11,339 INFO L226 Difference]: Without dead ends: 52 [2021-11-21 01:25:11,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:25:11,341 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 49 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:11,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 44 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:25:11,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-21 01:25:11,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-11-21 01:25:11,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.5) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:11,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2021-11-21 01:25:11,345 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 16 [2021-11-21 01:25:11,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:11,345 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2021-11-21 01:25:11,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:11,346 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2021-11-21 01:25:11,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-21 01:25:11,346 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:11,347 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:25:11,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-21 01:25:11,347 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-21 01:25:11,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:11,348 INFO L85 PathProgramCache]: Analyzing trace with hash -2076654982, now seen corresponding path program 1 times [2021-11-21 01:25:11,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:11,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870474670] [2021-11-21 01:25:11,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:11,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:11,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:11,529 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:11,530 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:11,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870474670] [2021-11-21 01:25:11,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870474670] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:25:11,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271974322] [2021-11-21 01:25:11,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:11,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:25:11,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:25:11,534 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:25:11,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:25:11,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:11,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-21 01:25:11,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:25:11,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-21 01:25:11,877 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-21 01:25:11,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-11-21 01:25:12,055 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 01:25:12,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-11-21 01:25:12,179 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 01:25:12,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 21 [2021-11-21 01:25:12,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:12,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:25:12,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2021-11-21 01:25:12,526 INFO L354 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2021-11-21 01:25:12,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 56 [2021-11-21 01:25:12,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:12,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271974322] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:25:12,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1755460306] [2021-11-21 01:25:12,604 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-21 01:25:12,604 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:25:12,608 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:25:12,613 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:25:12,614 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:25:12,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:12,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:12,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-21 01:25:12,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:12,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:12,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:12,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:12,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:12,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-21 01:25:13,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:13,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2021-11-21 01:25:13,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:13,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2021-11-21 01:25:13,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:13,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-21 01:25:13,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:13,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:13,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:13,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:13,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:13,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:13,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:13,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:13,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:13,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2021-11-21 01:25:13,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:13,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:13,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 65 [2021-11-21 01:25:13,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:13,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 01:25:13,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:13,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:13,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2021-11-21 01:25:14,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2021-11-21 01:25:14,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 65 [2021-11-21 01:25:14,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-21 01:25:14,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 58 [2021-11-21 01:25:15,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:15,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-21 01:25:15,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:15,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:15,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:25:15,159 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 01:25:15,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 219 treesize of output 143 [2021-11-21 01:25:15,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:15,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:25:15,189 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-11-21 01:25:15,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 215 treesize of output 216 [2021-11-21 01:25:15,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:15,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 01:25:15,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:15,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:15,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 65 [2021-11-21 01:25:15,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:15,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:15,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2021-11-21 01:25:15,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:15,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:15,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 65 [2021-11-21 01:25:16,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:16,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:16,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2021-11-21 01:25:16,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:16,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-21 01:25:16,628 INFO L354 Elim1Store]: treesize reduction 190, result has 32.4 percent of original size [2021-11-21 01:25:16,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 384 treesize of output 451 [2021-11-21 01:25:23,448 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-21 01:25:23,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 786 treesize of output 761 [2021-11-21 01:25:24,034 INFO L354 Elim1Store]: treesize reduction 444, result has 31.7 percent of original size [2021-11-21 01:25:24,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 9 new quantified variables, introduced 35 case distinctions, treesize of input 761 treesize of output 696 [2021-11-21 01:25:24,636 INFO L354 Elim1Store]: treesize reduction 320, result has 28.9 percent of original size [2021-11-21 01:25:24,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 35 case distinctions, treesize of input 696 treesize of output 717 [2021-11-21 01:26:08,286 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:26:10,752 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:26:10,752 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:26:10,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2021-11-21 01:26:10,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135906002] [2021-11-21 01:26:10,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:26:10,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-21 01:26:10,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:26:10,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-21 01:26:10,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2021-11-21 01:26:10,755 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 21 states, 20 states have (on average 1.9) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:11,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:11,196 INFO L93 Difference]: Finished difference Result 136 states and 146 transitions. [2021-11-21 01:26:11,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-21 01:26:11,197 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.9) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-21 01:26:11,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:11,198 INFO L225 Difference]: With dead ends: 136 [2021-11-21 01:26:11,198 INFO L226 Difference]: Without dead ends: 136 [2021-11-21 01:26:11,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=243, Invalid=1397, Unknown=0, NotChecked=0, Total=1640 [2021-11-21 01:26:11,199 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 241 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:11,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 200 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 341 Invalid, 0 Unknown, 188 Unchecked, 0.2s Time] [2021-11-21 01:26:11,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-21 01:26:11,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 62. [2021-11-21 01:26:11,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 46 states have (on average 1.4565217391304348) internal successors, (67), 61 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:11,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2021-11-21 01:26:11,208 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 16 [2021-11-21 01:26:11,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:11,208 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2021-11-21 01:26:11,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.9) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:11,209 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2021-11-21 01:26:11,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-21 01:26:11,212 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:11,212 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:11,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-21 01:26:11,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:26:11,433 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-21 01:26:11,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:11,433 INFO L85 PathProgramCache]: Analyzing trace with hash -2076654981, now seen corresponding path program 1 times [2021-11-21 01:26:11,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:26:11,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962311674] [2021-11-21 01:26:11,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:11,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:26:11,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:11,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:11,578 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:26:11,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962311674] [2021-11-21 01:26:11,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962311674] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:26:11,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604640506] [2021-11-21 01:26:11,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:11,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:26:11,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:26:11,580 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:26:11,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:26:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:11,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-21 01:26:11,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:11,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:26:11,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-21 01:26:11,856 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-21 01:26:11,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2021-11-21 01:26:11,875 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-21 01:26:11,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-21 01:26:11,959 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 01:26:11,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 50 [2021-11-21 01:26:11,969 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 01:26:11,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 38 [2021-11-21 01:26:12,053 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 01:26:12,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 42 [2021-11-21 01:26:12,059 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 01:26:12,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 24 [2021-11-21 01:26:12,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:12,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:12,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 87 [2021-11-21 01:26:12,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 130 [2021-11-21 01:26:12,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2021-11-21 01:26:12,382 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-21 01:26:12,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 47 [2021-11-21 01:26:12,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:12,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604640506] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:26:12,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [880587545] [2021-11-21 01:26:12,474 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-21 01:26:12,475 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:26:12,475 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:26:12,475 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:26:12,475 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:26:12,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:12,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:12,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-21 01:26:12,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:12,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:12,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:12,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:12,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:12,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-21 01:26:12,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:12,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2021-11-21 01:26:12,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:12,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2021-11-21 01:26:12,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:12,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-21 01:26:13,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:13,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:13,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:13,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:13,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:13,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:13,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:13,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:13,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:13,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2021-11-21 01:26:13,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:13,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:13,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-21 01:26:13,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:13,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:13,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 65 [2021-11-21 01:26:13,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:13,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 01:26:13,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:13,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:13,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 65 [2021-11-21 01:26:13,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:13,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:13,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2021-11-21 01:26:13,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:13,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-21 01:26:14,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:14,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:14,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:14,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:14,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:14,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:14,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:14,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:14,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:14,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:14,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:14,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:14,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:14,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:14,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 64 [2021-11-21 01:26:14,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:14,758 INFO L354 Elim1Store]: treesize reduction 130, result has 16.1 percent of original size [2021-11-21 01:26:14,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 269 treesize of output 163 [2021-11-21 01:26:14,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:14,805 INFO L354 Elim1Store]: treesize reduction 112, result has 17.0 percent of original size [2021-11-21 01:26:14,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 265 treesize of output 236 [2021-11-21 01:26:14,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:14,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-21 01:26:15,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:15,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 01:26:15,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:15,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:15,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-21 01:26:15,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:15,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:15,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 65 [2021-11-21 01:26:15,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:15,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:15,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2021-11-21 01:26:15,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:15,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-21 01:26:15,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:15,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:15,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 65 [2021-11-21 01:26:16,155 INFO L354 Elim1Store]: treesize reduction 190, result has 32.4 percent of original size [2021-11-21 01:26:16,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 384 treesize of output 451 [2021-11-21 01:26:22,122 INFO L354 Elim1Store]: treesize reduction 136, result has 18.1 percent of original size [2021-11-21 01:26:22,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 464 treesize of output 431 [2021-11-21 01:26:22,149 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-21 01:26:22,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 460 treesize of output 443 [2021-11-21 01:26:22,242 INFO L354 Elim1Store]: treesize reduction 154, result has 17.2 percent of original size [2021-11-21 01:26:22,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 445 treesize of output 335 [2021-11-21 01:26:22,813 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:26:24,768 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:26:24,768 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:26:24,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2021-11-21 01:26:24,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841237367] [2021-11-21 01:26:24,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:26:24,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-21 01:26:24,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:26:24,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-21 01:26:24,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2021-11-21 01:26:24,770 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:25,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:25,560 INFO L93 Difference]: Finished difference Result 136 states and 144 transitions. [2021-11-21 01:26:25,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-21 01:26:25,561 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-21 01:26:25,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:25,562 INFO L225 Difference]: With dead ends: 136 [2021-11-21 01:26:25,562 INFO L226 Difference]: Without dead ends: 136 [2021-11-21 01:26:25,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=335, Invalid=1921, Unknown=0, NotChecked=0, Total=2256 [2021-11-21 01:26:25,564 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 302 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 253 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:25,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 341 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 361 Invalid, 0 Unknown, 253 Unchecked, 0.3s Time] [2021-11-21 01:26:25,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-21 01:26:25,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 62. [2021-11-21 01:26:25,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 46 states have (on average 1.434782608695652) internal successors, (66), 61 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:25,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2021-11-21 01:26:25,569 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 16 [2021-11-21 01:26:25,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:25,570 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2021-11-21 01:26:25,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:25,570 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2021-11-21 01:26:25,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-21 01:26:25,571 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:25,571 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:25,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:25,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-21 01:26:25,772 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-21 01:26:25,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:25,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1677345780, now seen corresponding path program 1 times [2021-11-21 01:26:25,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:26:25,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421467057] [2021-11-21 01:26:25,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:25,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:26:25,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:25,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:25,813 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:26:25,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421467057] [2021-11-21 01:26:25,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421467057] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:25,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:25,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:26:25,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142505894] [2021-11-21 01:26:25,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:25,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:26:25,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:26:25,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:26:25,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:26:25,815 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:25,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:25,883 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2021-11-21 01:26:25,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:26:25,884 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-21 01:26:25,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:25,885 INFO L225 Difference]: With dead ends: 61 [2021-11-21 01:26:25,886 INFO L226 Difference]: Without dead ends: 61 [2021-11-21 01:26:25,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:26:25,887 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 3 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:25,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 86 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:26:25,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-21 01:26:25,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-11-21 01:26:25,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 60 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:25,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2021-11-21 01:26:25,891 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 17 [2021-11-21 01:26:25,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:25,891 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2021-11-21 01:26:25,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:25,892 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2021-11-21 01:26:25,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-21 01:26:25,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:25,897 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:25,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-21 01:26:25,897 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-21 01:26:25,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:25,898 INFO L85 PathProgramCache]: Analyzing trace with hash -458111525, now seen corresponding path program 1 times [2021-11-21 01:26:25,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:26:25,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012336166] [2021-11-21 01:26:25,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:25,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:26:25,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:25,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:25,986 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:26:25,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012336166] [2021-11-21 01:26:25,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012336166] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:25,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:25,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:26:25,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698588092] [2021-11-21 01:26:25,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:25,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:26:25,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:26:25,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:26:25,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:26:25,988 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:26,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:26,098 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2021-11-21 01:26:26,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:26:26,099 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-21 01:26:26,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:26,100 INFO L225 Difference]: With dead ends: 60 [2021-11-21 01:26:26,100 INFO L226 Difference]: Without dead ends: 60 [2021-11-21 01:26:26,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:26:26,101 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 79 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:26,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 34 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:26:26,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-21 01:26:26,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-11-21 01:26:26,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 46 states have (on average 1.391304347826087) internal successors, (64), 59 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:26,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2021-11-21 01:26:26,105 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 18 [2021-11-21 01:26:26,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:26,105 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2021-11-21 01:26:26,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:26,106 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2021-11-21 01:26:26,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-21 01:26:26,106 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:26,106 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:26,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-21 01:26:26,107 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-21 01:26:26,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:26,107 INFO L85 PathProgramCache]: Analyzing trace with hash -458111524, now seen corresponding path program 1 times [2021-11-21 01:26:26,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:26:26,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199129265] [2021-11-21 01:26:26,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:26,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:26:26,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:26,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:26,144 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:26:26,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199129265] [2021-11-21 01:26:26,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199129265] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:26,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:26,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:26:26,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533198464] [2021-11-21 01:26:26,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:26,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:26:26,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:26:26,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:26:26,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:26:26,147 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:26,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:26,191 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2021-11-21 01:26:26,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:26:26,192 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-21 01:26:26,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:26,193 INFO L225 Difference]: With dead ends: 55 [2021-11-21 01:26:26,193 INFO L226 Difference]: Without dead ends: 55 [2021-11-21 01:26:26,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:26:26,194 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 37 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:26,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 20 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:26:26,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-21 01:26:26,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-11-21 01:26:26,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 54 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:26,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2021-11-21 01:26:26,197 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 18 [2021-11-21 01:26:26,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:26,197 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2021-11-21 01:26:26,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:26,198 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2021-11-21 01:26:26,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-21 01:26:26,199 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:26,199 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:26,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-21 01:26:26,199 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-21 01:26:26,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:26,200 INFO L85 PathProgramCache]: Analyzing trace with hash 141357921, now seen corresponding path program 1 times [2021-11-21 01:26:26,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:26:26,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488459965] [2021-11-21 01:26:26,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:26,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:26:26,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 01:26:26,228 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-21 01:26:26,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 01:26:26,275 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-21 01:26:26,276 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-21 01:26:26,277 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_LEAK (40 of 41 remaining) [2021-11-21 01:26:26,279 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (39 of 41 remaining) [2021-11-21 01:26:26,279 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (38 of 41 remaining) [2021-11-21 01:26:26,280 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (37 of 41 remaining) [2021-11-21 01:26:26,280 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (36 of 41 remaining) [2021-11-21 01:26:26,280 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (35 of 41 remaining) [2021-11-21 01:26:26,280 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (34 of 41 remaining) [2021-11-21 01:26:26,281 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION (33 of 41 remaining) [2021-11-21 01:26:26,281 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION (32 of 41 remaining) [2021-11-21 01:26:26,281 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION (31 of 41 remaining) [2021-11-21 01:26:26,281 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION (30 of 41 remaining) [2021-11-21 01:26:26,282 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION (29 of 41 remaining) [2021-11-21 01:26:26,282 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION (28 of 41 remaining) [2021-11-21 01:26:26,282 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION (27 of 41 remaining) [2021-11-21 01:26:26,282 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION (26 of 41 remaining) [2021-11-21 01:26:26,282 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION (25 of 41 remaining) [2021-11-21 01:26:26,283 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION (24 of 41 remaining) [2021-11-21 01:26:26,283 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATION (23 of 41 remaining) [2021-11-21 01:26:26,283 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION (22 of 41 remaining) [2021-11-21 01:26:26,283 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATION (21 of 41 remaining) [2021-11-21 01:26:26,284 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATION (20 of 41 remaining) [2021-11-21 01:26:26,284 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATION (19 of 41 remaining) [2021-11-21 01:26:26,284 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATION (18 of 41 remaining) [2021-11-21 01:26:26,284 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE (17 of 41 remaining) [2021-11-21 01:26:26,285 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE (16 of 41 remaining) [2021-11-21 01:26:26,285 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE (15 of 41 remaining) [2021-11-21 01:26:26,285 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATION (14 of 41 remaining) [2021-11-21 01:26:26,285 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATION (13 of 41 remaining) [2021-11-21 01:26:26,285 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27REQUIRES_VIOLATION (12 of 41 remaining) [2021-11-21 01:26:26,286 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28REQUIRES_VIOLATION (11 of 41 remaining) [2021-11-21 01:26:26,286 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29REQUIRES_VIOLATION (10 of 41 remaining) [2021-11-21 01:26:26,286 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr30REQUIRES_VIOLATION (9 of 41 remaining) [2021-11-21 01:26:26,286 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr31REQUIRES_VIOLATION (8 of 41 remaining) [2021-11-21 01:26:26,287 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr32REQUIRES_VIOLATION (7 of 41 remaining) [2021-11-21 01:26:26,287 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr33REQUIRES_VIOLATION (6 of 41 remaining) [2021-11-21 01:26:26,287 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr34REQUIRES_VIOLATION (5 of 41 remaining) [2021-11-21 01:26:26,287 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE (4 of 41 remaining) [2021-11-21 01:26:26,288 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE (3 of 41 remaining) [2021-11-21 01:26:26,288 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE (2 of 41 remaining) [2021-11-21 01:26:26,288 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr38REQUIRES_VIOLATION (1 of 41 remaining) [2021-11-21 01:26:26,288 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr39REQUIRES_VIOLATION (0 of 41 remaining) [2021-11-21 01:26:26,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-21 01:26:26,292 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:26,296 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-21 01:26:26,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 01:26:26 BoogieIcfgContainer [2021-11-21 01:26:26,339 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-21 01:26:26,341 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-21 01:26:26,341 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-21 01:26:26,342 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-21 01:26:26,342 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:25:08" (3/4) ... [2021-11-21 01:26:26,346 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-21 01:26:26,346 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-21 01:26:26,347 INFO L158 Benchmark]: Toolchain (without parser) took 79278.19ms. Allocated memory was 127.9MB in the beginning and 270.5MB in the end (delta: 142.6MB). Free memory was 94.2MB in the beginning and 189.0MB in the end (delta: -94.8MB). Peak memory consumption was 47.0MB. Max. memory is 16.1GB. [2021-11-21 01:26:26,348 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 79.7MB. Free memory was 35.9MB in the beginning and 35.8MB in the end (delta: 69.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:26:26,348 INFO L158 Benchmark]: CACSL2BoogieTranslator took 495.45ms. Allocated memory is still 127.9MB. Free memory was 94.0MB in the beginning and 98.9MB in the end (delta: -4.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-21 01:26:26,349 INFO L158 Benchmark]: Boogie Procedure Inliner took 64.67ms. Allocated memory is still 127.9MB. Free memory was 98.9MB in the beginning and 96.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:26:26,349 INFO L158 Benchmark]: Boogie Preprocessor took 28.33ms. Allocated memory is still 127.9MB. Free memory was 96.8MB in the beginning and 95.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:26:26,350 INFO L158 Benchmark]: RCFGBuilder took 587.48ms. Allocated memory is still 127.9MB. Free memory was 95.4MB in the beginning and 77.9MB in the end (delta: 17.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-21 01:26:26,351 INFO L158 Benchmark]: TraceAbstraction took 78089.85ms. Allocated memory was 127.9MB in the beginning and 270.5MB in the end (delta: 142.6MB). Free memory was 77.3MB in the beginning and 189.0MB in the end (delta: -111.8MB). Peak memory consumption was 32.9MB. Max. memory is 16.1GB. [2021-11-21 01:26:26,351 INFO L158 Benchmark]: Witness Printer took 5.23ms. Allocated memory is still 270.5MB. Free memory is still 189.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:26:26,354 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 79.7MB. Free memory was 35.9MB in the beginning and 35.8MB in the end (delta: 69.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 495.45ms. Allocated memory is still 127.9MB. Free memory was 94.0MB in the beginning and 98.9MB in the end (delta: -4.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 64.67ms. Allocated memory is still 127.9MB. Free memory was 98.9MB in the beginning and 96.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.33ms. Allocated memory is still 127.9MB. Free memory was 96.8MB in the beginning and 95.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 587.48ms. Allocated memory is still 127.9MB. Free memory was 95.4MB in the beginning and 77.9MB in the end (delta: 17.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 78089.85ms. Allocated memory was 127.9MB in the beginning and 270.5MB in the end (delta: 142.6MB). Free memory was 77.3MB in the beginning and 189.0MB in the end (delta: -111.8MB). Peak memory consumption was 32.9MB. Max. memory is 16.1GB. * Witness Printer took 5.23ms. Allocated memory is still 270.5MB. Free memory is still 189.0MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 537]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 537. Possible FailurePath: [L539] struct item *list = ((void *)0); VAL [list={6:0}] [L541] CALL append(&list) [L530] struct item *item = malloc(sizeof *item); [L531] EXPR \read(**plist) VAL [\read(**plist)={0:0}, item={3:0}, plist={6:0}, plist={6:0}] [L531] item->next = *plist [L532] EXPR item->next VAL [item={3:0}, item->next={0:0}, plist={6:0}, plist={6:0}] [L532-L534] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L532-L534] EXPR (item->next) ? item->next->data : malloc(sizeof *item) VAL [(item->next) ? item->next->data : malloc(sizeof *item)={-1:0}, item={3:0}, item->next={0:0}, malloc(sizeof *item)={-1:0}, plist={6:0}, plist={6:0}] [L532-L534] item->data = (item->next) ? item->next->data : malloc(sizeof *item) [L535] *plist = item [L541] RET append(&list) [L542] COND FALSE !(__VERIFIER_nondet_int()) [L543] \read(*list) VAL [\read(*list)={3:0}, list={6:0}] [L543] COND TRUE \read(*list) [L544] EXPR \read(*list) VAL [\read(*list)={3:0}, list={6:0}] [L544] EXPR list->next [L544] struct item *next = list->next; [L545] EXPR \read(*list) VAL [\read(*list)={3:0}, list={6:0}, next={0:0}] [L545] free(list) VAL [\read(*list)={3:0}, list={6:0}, next={0:0}] [L545] free(list) VAL [\read(*list)={3:0}, list={6:0}, next={0:0}] [L545] free(list) [L546] list = next VAL [list={6:0}, next={0:0}] [L548] \read(*list) VAL [\read(*list)={0:0}, list={6:0}, next={0:0}] [L548] COND FALSE !(\read(*list)) [L553] return 0; [L539] struct item *list = ((void *)0); [L553] return 0; VAL [\result=0, next={0:0}] - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 73 locations, 41 error locations. Started 1 CEGAR loops. OverallTime: 78.0s, OverallIterations: 17, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1682 SdHoareTripleChecker+Valid, 1.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1682 mSDsluCounter, 1389 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 441 IncrementalHoareTripleChecker+Unchecked, 1019 mSDsCounter, 126 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1804 IncrementalHoareTripleChecker+Invalid, 2371 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 126 mSolverCounterUnsat, 401 mSDtfsCounter, 1804 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 208 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 6.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=73occurred in iteration=0, InterpolantAutomatonStates: 113, 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, 16 MinimizatonAttempts, 289 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 241 NumberOfCodeBlocks, 241 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 231 ConstructedInterpolants, 16 QuantifiedInterpolants, 2548 SizeOfPredicates, 39 NumberOfNonLiveVariables, 310 ConjunctsInSsa, 71 ConjunctsInUnsatCore, 20 InterpolantComputations, 14 PerfectInterpolantSequences, 6/30 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 could not prove your program: unable to determine feasibility of some traces [2021-11-21 01:26:26,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0232-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P --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 1228d922512a0e9364273220ccc1e5afc3bfb7c0e22f10439a1ba902492e71b2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:26:29,007 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:26:29,010 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:26:29,066 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:26:29,066 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:26:29,070 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:26:29,072 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:26:29,076 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:26:29,080 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:26:29,087 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:26:29,089 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:26:29,091 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:26:29,091 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:26:29,094 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:26:29,096 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:26:29,100 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:26:29,102 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:26:29,103 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:26:29,105 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:26:29,115 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:26:29,117 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:26:29,118 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:26:29,121 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:26:29,123 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:26:29,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:26:29,132 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:26:29,133 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:26:29,135 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:26:29,135 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:26:29,136 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:26:29,137 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:26:29,137 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:26:29,139 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:26:29,140 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:26:29,142 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:26:29,142 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:26:29,143 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:26:29,143 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:26:29,161 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:26:29,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:26:29,163 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:26:29,164 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-21 01:26:29,208 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:26:29,208 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:26:29,209 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:26:29,209 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:26:29,210 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:26:29,210 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:26:29,211 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:26:29,211 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:26:29,211 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:26:29,211 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:26:29,213 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:26:29,213 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:26:29,214 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-21 01:26:29,215 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-21 01:26:29,215 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:26:29,215 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:26:29,215 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 01:26:29,215 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:26:29,216 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:26:29,216 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:26:29,216 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-21 01:26:29,216 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-21 01:26:29,217 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-21 01:26:29,217 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:26:29,217 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-21 01:26:29,217 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-21 01:26:29,217 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-21 01:26:29,218 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:26:29,218 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:26:29,218 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:26:29,219 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-21 01:26:29,219 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:26:29,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:26:29,220 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:26:29,220 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:26:29,220 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-21 01:26:29,221 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-21 01:26:29,221 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:26:29,221 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:26:29,221 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1228d922512a0e9364273220ccc1e5afc3bfb7c0e22f10439a1ba902492e71b2 [2021-11-21 01:26:29,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:26:29,661 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:26:29,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:26:29,663 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:26:29,668 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:26:29,669 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/memsafety/test-0232-1.i [2021-11-21 01:26:29,733 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/data/0e95b4f5a/364a8c113cae466d97ca4700a7164786/FLAG9c63f62ee [2021-11-21 01:26:30,296 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:26:30,297 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/sv-benchmarks/c/memsafety/test-0232-1.i [2021-11-21 01:26:30,315 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/data/0e95b4f5a/364a8c113cae466d97ca4700a7164786/FLAG9c63f62ee [2021-11-21 01:26:30,571 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/data/0e95b4f5a/364a8c113cae466d97ca4700a7164786 [2021-11-21 01:26:30,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:26:30,575 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:26:30,577 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:26:30,577 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:26:30,581 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:26:30,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:26:30" (1/1) ... [2021-11-21 01:26:30,583 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65880458 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:30, skipping insertion in model container [2021-11-21 01:26:30,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:26:30" (1/1) ... [2021-11-21 01:26:30,591 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:26:30,648 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:26:30,958 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:26:30,975 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:26:31,027 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:26:31,062 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:26:31,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:31 WrapperNode [2021-11-21 01:26:31,063 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:26:31,064 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:26:31,064 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:26:31,065 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:26:31,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:31" (1/1) ... [2021-11-21 01:26:31,109 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:31" (1/1) ... [2021-11-21 01:26:31,131 INFO L137 Inliner]: procedures = 127, calls = 32, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 81 [2021-11-21 01:26:31,131 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:26:31,132 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:26:31,135 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:26:31,135 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:26:31,143 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:31" (1/1) ... [2021-11-21 01:26:31,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:31" (1/1) ... [2021-11-21 01:26:31,156 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:31" (1/1) ... [2021-11-21 01:26:31,159 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:31" (1/1) ... [2021-11-21 01:26:31,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:31" (1/1) ... [2021-11-21 01:26:31,186 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:31" (1/1) ... [2021-11-21 01:26:31,188 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:31" (1/1) ... [2021-11-21 01:26:31,192 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:26:31,193 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:26:31,193 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:26:31,193 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:26:31,194 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:31" (1/1) ... [2021-11-21 01:26:31,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:26:31,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:26:31,226 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:26:31,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:26:31,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:26:31,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:26:31,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:26:31,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:26:31,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:26:31,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:26:31,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 01:26:31,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-21 01:26:31,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:26:31,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:26:31,413 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:26:31,415 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:26:31,946 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:26:31,952 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:26:31,953 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-21 01:26:31,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:26:31 BoogieIcfgContainer [2021-11-21 01:26:31,955 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:26:31,957 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:26:31,957 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:26:31,959 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:26:31,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:26:30" (1/3) ... [2021-11-21 01:26:31,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f55a955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:26:31, skipping insertion in model container [2021-11-21 01:26:31,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:31" (2/3) ... [2021-11-21 01:26:31,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f55a955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:26:31, skipping insertion in model container [2021-11-21 01:26:31,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:26:31" (3/3) ... [2021-11-21 01:26:31,963 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0232-1.i [2021-11-21 01:26:31,968 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:26:31,968 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 41 error locations. [2021-11-21 01:26:32,027 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:26:32,036 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:26:32,037 INFO L340 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2021-11-21 01:26:32,063 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 80 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:32,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-21 01:26:32,074 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:32,075 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-21 01:26:32,075 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-21 01:26:32,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:32,081 INFO L85 PathProgramCache]: Analyzing trace with hash 925637, now seen corresponding path program 1 times [2021-11-21 01:26:32,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:26:32,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [399147013] [2021-11-21 01:26:32,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:32,095 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:26:32,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:26:32,103 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:26:32,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-21 01:26:32,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:32,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:26:32,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:32,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:26:32,328 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-21 01:26:32,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 23 [2021-11-21 01:26:32,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:32,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:32,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:32,422 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:26:32,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [399147013] [2021-11-21 01:26:32,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [399147013] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:32,423 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:32,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-21 01:26:32,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450213206] [2021-11-21 01:26:32,426 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:32,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:26:32,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:26:32,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:26:32,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:26:32,468 INFO L87 Difference]: Start difference. First operand has 81 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 80 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:32,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:32,718 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2021-11-21 01:26:32,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:26:32,721 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-21 01:26:32,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:32,741 INFO L225 Difference]: With dead ends: 76 [2021-11-21 01:26:32,742 INFO L226 Difference]: Without dead ends: 74 [2021-11-21 01:26:32,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:26:32,746 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 79 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:32,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 66 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 49 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2021-11-21 01:26:32,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-21 01:26:32,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2021-11-21 01:26:32,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 71 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:32,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2021-11-21 01:26:32,783 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 4 [2021-11-21 01:26:32,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:32,783 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2021-11-21 01:26:32,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:32,784 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2021-11-21 01:26:32,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-21 01:26:32,784 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:32,785 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-21 01:26:32,799 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-21 01:26:32,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:26:32,997 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-21 01:26:32,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:32,997 INFO L85 PathProgramCache]: Analyzing trace with hash 925638, now seen corresponding path program 1 times [2021-11-21 01:26:32,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:26:32,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1596975133] [2021-11-21 01:26:32,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:32,999 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:26:32,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:26:33,003 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:26:33,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-21 01:26:33,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:33,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:26:33,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:33,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:26:33,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:26:33,206 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:26:33,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-21 01:26:33,215 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:26:33,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-11-21 01:26:33,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:33,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:33,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:33,502 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:26:33,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1596975133] [2021-11-21 01:26:33,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1596975133] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:33,503 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:33,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-21 01:26:33,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686352088] [2021-11-21 01:26:33,504 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:33,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:26:33,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:26:33,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:26:33,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:26:33,506 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:33,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:33,922 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2021-11-21 01:26:33,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:26:33,923 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-21 01:26:33,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:33,925 INFO L225 Difference]: With dead ends: 74 [2021-11-21 01:26:33,925 INFO L226 Difference]: Without dead ends: 74 [2021-11-21 01:26:33,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:26:33,927 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 47 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:33,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 140 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 91 Unchecked, 0.4s Time] [2021-11-21 01:26:33,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-21 01:26:33,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-21 01:26:33,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 40 states have (on average 1.925) internal successors, (77), 73 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:33,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2021-11-21 01:26:33,936 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 4 [2021-11-21 01:26:33,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:33,937 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2021-11-21 01:26:33,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:33,937 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2021-11-21 01:26:33,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-21 01:26:33,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:33,938 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-21 01:26:33,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:34,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:26:34,149 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-21 01:26:34,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:34,150 INFO L85 PathProgramCache]: Analyzing trace with hash 28694727, now seen corresponding path program 1 times [2021-11-21 01:26:34,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:26:34,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1666843749] [2021-11-21 01:26:34,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:34,153 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:26:34,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:26:34,155 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:26:34,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-21 01:26:34,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:34,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:26:34,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:34,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:26:34,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:34,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:34,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:34,263 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:26:34,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1666843749] [2021-11-21 01:26:34,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1666843749] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:34,264 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:34,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-21 01:26:34,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877626450] [2021-11-21 01:26:34,264 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:34,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:26:34,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:26:34,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:26:34,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:26:34,266 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:34,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:34,519 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2021-11-21 01:26:34,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:26:34,524 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-21 01:26:34,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:34,526 INFO L225 Difference]: With dead ends: 88 [2021-11-21 01:26:34,526 INFO L226 Difference]: Without dead ends: 88 [2021-11-21 01:26:34,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:26:34,528 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 56 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:34,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 55 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:26:34,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-21 01:26:34,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 70. [2021-11-21 01:26:34,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 40 states have (on average 1.825) internal successors, (73), 69 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:34,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2021-11-21 01:26:34,537 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 5 [2021-11-21 01:26:34,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:34,538 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2021-11-21 01:26:34,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:34,538 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2021-11-21 01:26:34,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-21 01:26:34,539 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:34,539 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-21 01:26:34,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:34,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:26:34,751 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-21 01:26:34,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:34,751 INFO L85 PathProgramCache]: Analyzing trace with hash 28694728, now seen corresponding path program 1 times [2021-11-21 01:26:34,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:26:34,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [16621518] [2021-11-21 01:26:34,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:34,752 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:26:34,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:26:34,754 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:26:34,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-21 01:26:34,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:34,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:26:34,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:34,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:26:34,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:34,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:34,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:34,937 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:26:34,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [16621518] [2021-11-21 01:26:34,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [16621518] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:34,938 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:34,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-21 01:26:34,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004864988] [2021-11-21 01:26:34,938 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:34,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:26:34,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:26:34,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:26:34,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:26:34,940 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:35,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:35,133 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2021-11-21 01:26:35,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:26:35,134 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-21 01:26:35,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:35,135 INFO L225 Difference]: With dead ends: 66 [2021-11-21 01:26:35,135 INFO L226 Difference]: Without dead ends: 66 [2021-11-21 01:26:35,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:26:35,137 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 62 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:35,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 36 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:26:35,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-21 01:26:35,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-11-21 01:26:35,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 40 states have (on average 1.725) internal successors, (69), 65 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:35,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2021-11-21 01:26:35,148 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 5 [2021-11-21 01:26:35,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:35,148 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2021-11-21 01:26:35,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:35,149 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2021-11-21 01:26:35,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 01:26:35,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:35,150 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:35,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:35,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:26:35,365 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-21 01:26:35,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:35,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1328641136, now seen corresponding path program 1 times [2021-11-21 01:26:35,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:26:35,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [31215017] [2021-11-21 01:26:35,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:35,367 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:26:35,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:26:35,368 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:26:35,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-21 01:26:35,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:35,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-21 01:26:35,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:35,628 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 01:26:35,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 40 [2021-11-21 01:26:35,666 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 01:26:35,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2021-11-21 01:26:35,812 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 01:26:35,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 35 [2021-11-21 01:26:35,825 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 01:26:35,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-11-21 01:26:35,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:35,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:35,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:35,989 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:26:35,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [31215017] [2021-11-21 01:26:35,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [31215017] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:35,989 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:35,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2021-11-21 01:26:35,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529136886] [2021-11-21 01:26:35,989 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:35,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 01:26:35,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:26:35,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 01:26:35,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:26:35,990 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:36,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:36,425 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2021-11-21 01:26:36,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:26:36,427 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-21 01:26:36,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:36,428 INFO L225 Difference]: With dead ends: 70 [2021-11-21 01:26:36,428 INFO L226 Difference]: Without dead ends: 70 [2021-11-21 01:26:36,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:26:36,430 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 4 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:36,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 356 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 21 Unchecked, 0.3s Time] [2021-11-21 01:26:36,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-21 01:26:36,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-11-21 01:26:36,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 44 states have (on average 1.6590909090909092) internal successors, (73), 69 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:36,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2021-11-21 01:26:36,449 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 10 [2021-11-21 01:26:36,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:36,450 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2021-11-21 01:26:36,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:36,450 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2021-11-21 01:26:36,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 01:26:36,451 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:36,451 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:36,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:36,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:26:36,657 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-21 01:26:36,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:36,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1762075787, now seen corresponding path program 1 times [2021-11-21 01:26:36,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:26:36,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [771490181] [2021-11-21 01:26:36,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:36,659 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:26:36,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:26:36,660 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:26:36,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-21 01:26:36,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:36,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:26:36,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:36,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:26:36,865 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-21 01:26:36,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2021-11-21 01:26:36,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:36,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:39,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:39,173 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:26:39,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [771490181] [2021-11-21 01:26:39,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [771490181] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:39,174 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:39,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 3] imperfect sequences [] total 5 [2021-11-21 01:26:39,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733551769] [2021-11-21 01:26:39,175 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:39,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:26:39,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:26:39,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:26:39,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=14, Unknown=1, NotChecked=0, Total=30 [2021-11-21 01:26:39,176 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:39,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:39,204 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2021-11-21 01:26:39,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:26:39,205 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-21 01:26:39,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:39,206 INFO L225 Difference]: With dead ends: 72 [2021-11-21 01:26:39,206 INFO L226 Difference]: Without dead ends: 72 [2021-11-21 01:26:39,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=15, Invalid=14, Unknown=1, NotChecked=0, Total=30 [2021-11-21 01:26:39,207 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 18 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:39,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 115 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 57 Unchecked, 0.0s Time] [2021-11-21 01:26:39,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-21 01:26:39,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2021-11-21 01:26:39,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 44 states have (on average 1.6363636363636365) internal successors, (72), 68 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:39,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2021-11-21 01:26:39,214 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 11 [2021-11-21 01:26:39,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:39,214 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2021-11-21 01:26:39,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:39,215 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2021-11-21 01:26:39,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 01:26:39,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:39,215 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:39,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:39,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:26:39,426 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-21 01:26:39,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:39,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1762075788, now seen corresponding path program 1 times [2021-11-21 01:26:39,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:26:39,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [55081233] [2021-11-21 01:26:39,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:39,428 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:26:39,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:26:39,429 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:26:39,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-21 01:26:39,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:39,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:26:39,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:39,645 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:26:39,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2021-11-21 01:26:39,657 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:26:39,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2021-11-21 01:26:39,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:39,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:42,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2021-11-21 01:26:42,179 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-21 01:26:42,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 49 [2021-11-21 01:26:42,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:42,309 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:26:42,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [55081233] [2021-11-21 01:26:42,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [55081233] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:42,309 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:42,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-21 01:26:42,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653656020] [2021-11-21 01:26:42,310 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:42,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 01:26:42,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:26:42,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 01:26:42,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=61, Unknown=1, NotChecked=0, Total=90 [2021-11-21 01:26:42,311 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:42,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:42,788 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2021-11-21 01:26:42,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 01:26:42,789 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-21 01:26:42,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:42,790 INFO L225 Difference]: With dead ends: 75 [2021-11-21 01:26:42,790 INFO L226 Difference]: Without dead ends: 75 [2021-11-21 01:26:42,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=56, Invalid=99, Unknown=1, NotChecked=0, Total=156 [2021-11-21 01:26:42,791 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 78 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:42,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 182 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 90 Invalid, 0 Unknown, 50 Unchecked, 0.4s Time] [2021-11-21 01:26:42,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-21 01:26:42,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2021-11-21 01:26:42,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 71 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:42,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2021-11-21 01:26:42,798 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 11 [2021-11-21 01:26:42,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:42,798 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2021-11-21 01:26:42,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:42,798 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2021-11-21 01:26:42,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-21 01:26:42,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:42,799 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:42,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:43,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:26:43,013 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-21 01:26:43,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:43,013 INFO L85 PathProgramCache]: Analyzing trace with hash 909486884, now seen corresponding path program 1 times [2021-11-21 01:26:43,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:26:43,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [647153530] [2021-11-21 01:26:43,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:43,014 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:26:43,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:26:43,015 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:26:43,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-21 01:26:43,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:43,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:26:43,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:43,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:43,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:43,374 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:26:43,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2021-11-21 01:26:43,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:43,711 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:26:43,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [647153530] [2021-11-21 01:26:43,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [647153530] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:43,712 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:43,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-21 01:26:43,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214481282] [2021-11-21 01:26:43,712 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:43,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:26:43,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:26:43,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:26:43,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:26:43,714 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:43,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:43,914 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2021-11-21 01:26:43,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:26:43,915 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-21 01:26:43,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:43,916 INFO L225 Difference]: With dead ends: 62 [2021-11-21 01:26:43,916 INFO L226 Difference]: Without dead ends: 62 [2021-11-21 01:26:43,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:26:43,917 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 185 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:43,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 37 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:26:43,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-21 01:26:43,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2021-11-21 01:26:43,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 58 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:43,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-11-21 01:26:43,922 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 14 [2021-11-21 01:26:43,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:43,923 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-11-21 01:26:43,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:43,923 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-11-21 01:26:43,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-21 01:26:43,924 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:43,924 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:43,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:44,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:26:44,136 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-21 01:26:44,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:44,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1870051159, now seen corresponding path program 1 times [2021-11-21 01:26:44,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:26:44,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1425118689] [2021-11-21 01:26:44,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:44,137 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:26:44,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:26:44,138 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:26:44,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-21 01:26:44,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:44,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:26:44,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:44,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-21 01:26:44,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-21 01:26:44,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:44,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:44,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2021-11-21 01:26:44,614 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-21 01:26:44,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 37 [2021-11-21 01:26:44,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:44,696 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:26:44,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1425118689] [2021-11-21 01:26:44,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1425118689] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:44,696 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:44,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-21 01:26:44,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686672182] [2021-11-21 01:26:44,696 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:44,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:26:44,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:26:44,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:26:44,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:26:44,698 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:45,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:45,051 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2021-11-21 01:26:45,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:26:45,052 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-21 01:26:45,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:45,052 INFO L225 Difference]: With dead ends: 73 [2021-11-21 01:26:45,052 INFO L226 Difference]: Without dead ends: 73 [2021-11-21 01:26:45,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:26:45,053 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 149 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:45,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 83 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 91 Invalid, 0 Unknown, 25 Unchecked, 0.3s Time] [2021-11-21 01:26:45,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-21 01:26:45,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 58. [2021-11-21 01:26:45,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 57 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:45,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2021-11-21 01:26:45,058 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 17 [2021-11-21 01:26:45,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:45,059 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2021-11-21 01:26:45,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:45,059 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2021-11-21 01:26:45,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-21 01:26:45,060 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:45,060 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:45,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:45,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:26:45,271 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-21 01:26:45,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:45,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1870051160, now seen corresponding path program 1 times [2021-11-21 01:26:45,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:26:45,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [895048874] [2021-11-21 01:26:45,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:45,272 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:26:45,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:26:45,273 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:26:45,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-21 01:26:45,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:45,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 01:26:45,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:45,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-21 01:26:45,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:26:45,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-11-21 01:26:45,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-11-21 01:26:45,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:45,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:45,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-11-21 01:26:46,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:46,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:46,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:46,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:46,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-21 01:26:46,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:46,530 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:26:46,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [895048874] [2021-11-21 01:26:46,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [895048874] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:46,530 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:46,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-21 01:26:46,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925302466] [2021-11-21 01:26:46,531 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:46,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 01:26:46,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:26:46,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 01:26:46,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:26:46,532 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:47,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:47,298 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2021-11-21 01:26:47,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:26:47,299 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-21 01:26:47,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:47,300 INFO L225 Difference]: With dead ends: 74 [2021-11-21 01:26:47,300 INFO L226 Difference]: Without dead ends: 74 [2021-11-21 01:26:47,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:26:47,301 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 215 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:47,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 93 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:26:47,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-21 01:26:47,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 57. [2021-11-21 01:26:47,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 56 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:47,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2021-11-21 01:26:47,307 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 17 [2021-11-21 01:26:47,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:47,307 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2021-11-21 01:26:47,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:47,307 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2021-11-21 01:26:47,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-21 01:26:47,308 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:47,308 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:47,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:47,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:26:47,509 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-21 01:26:47,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:47,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1843001263, now seen corresponding path program 1 times [2021-11-21 01:26:47,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:26:47,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1022321600] [2021-11-21 01:26:47,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:47,511 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:26:47,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:26:47,512 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:26:47,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-21 01:26:47,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:47,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:26:47,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:47,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:26:47,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-21 01:26:47,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:47,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:47,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:26:48,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:48,012 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:26:48,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1022321600] [2021-11-21 01:26:48,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1022321600] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:48,012 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:48,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-21 01:26:48,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682465344] [2021-11-21 01:26:48,013 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:48,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:26:48,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:26:48,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:26:48,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:26:48,014 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:48,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:48,365 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2021-11-21 01:26:48,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:26:48,366 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-21 01:26:48,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:48,367 INFO L225 Difference]: With dead ends: 57 [2021-11-21 01:26:48,367 INFO L226 Difference]: Without dead ends: 57 [2021-11-21 01:26:48,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:26:48,368 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 53 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:48,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 89 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:26:48,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-21 01:26:48,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-11-21 01:26:48,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 56 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:48,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2021-11-21 01:26:48,373 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 19 [2021-11-21 01:26:48,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:48,374 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2021-11-21 01:26:48,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:48,374 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2021-11-21 01:26:48,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-21 01:26:48,375 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:48,375 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:48,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:48,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:26:48,586 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-21 01:26:48,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:48,586 INFO L85 PathProgramCache]: Analyzing trace with hash 673311177, now seen corresponding path program 1 times [2021-11-21 01:26:48,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:26:48,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [276993089] [2021-11-21 01:26:48,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:48,587 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:26:48,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:26:48,591 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:26:48,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-21 01:26:48,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:48,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:26:48,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:48,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:26:48,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-21 01:26:48,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:48,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:48,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-21 01:26:49,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:49,111 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:26:49,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [276993089] [2021-11-21 01:26:49,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [276993089] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:49,111 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:49,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-21 01:26:49,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70144172] [2021-11-21 01:26:49,112 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:49,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:26:49,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:26:49,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:26:49,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:26:49,113 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:49,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:49,377 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2021-11-21 01:26:49,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:26:49,378 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-21 01:26:49,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:49,378 INFO L225 Difference]: With dead ends: 56 [2021-11-21 01:26:49,378 INFO L226 Difference]: Without dead ends: 56 [2021-11-21 01:26:49,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:26:49,379 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 53 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:49,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 81 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:26:49,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-21 01:26:49,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-11-21 01:26:49,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 55 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:49,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2021-11-21 01:26:49,397 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 20 [2021-11-21 01:26:49,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:49,397 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2021-11-21 01:26:49,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:49,398 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2021-11-21 01:26:49,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-21 01:26:49,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:49,401 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:49,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:49,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:26:49,605 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-21 01:26:49,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:49,605 INFO L85 PathProgramCache]: Analyzing trace with hash -602189896, now seen corresponding path program 1 times [2021-11-21 01:26:49,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:26:49,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1673105813] [2021-11-21 01:26:49,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:49,606 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:26:49,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:26:49,607 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:26:49,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-21 01:26:49,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:49,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:26:49,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:49,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-21 01:26:50,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-21 01:26:50,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:50,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:50,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-21 01:26:50,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:50,352 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:26:50,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1673105813] [2021-11-21 01:26:50,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1673105813] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:50,352 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:50,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 8 [2021-11-21 01:26:50,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773321509] [2021-11-21 01:26:50,353 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:50,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 01:26:50,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:26:50,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 01:26:50,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:26:50,355 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 9 states, 8 states have (on average 5.25) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:50,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:50,925 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2021-11-21 01:26:50,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:26:50,926 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-21 01:26:50,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:50,927 INFO L225 Difference]: With dead ends: 55 [2021-11-21 01:26:50,927 INFO L226 Difference]: Without dead ends: 55 [2021-11-21 01:26:50,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:26:50,928 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 62 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:50,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 89 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:26:50,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-21 01:26:50,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-11-21 01:26:50,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 54 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:50,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2021-11-21 01:26:50,931 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 21 [2021-11-21 01:26:50,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:50,932 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2021-11-21 01:26:50,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:50,932 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2021-11-21 01:26:50,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-21 01:26:50,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:50,933 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:50,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:51,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:26:51,141 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-21 01:26:51,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:51,141 INFO L85 PathProgramCache]: Analyzing trace with hash 717052317, now seen corresponding path program 1 times [2021-11-21 01:26:51,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:26:51,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [545978716] [2021-11-21 01:26:51,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:51,142 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:26:51,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:26:51,144 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:26:51,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-21 01:26:51,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:51,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 01:26:51,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:51,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-21 01:26:51,486 INFO L354 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2021-11-21 01:26:51,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2021-11-21 01:26:51,668 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 01:26:51,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 31 [2021-11-21 01:26:51,945 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 01:26:51,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 31 [2021-11-21 01:26:52,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:52,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:52,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-11-21 01:26:52,366 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-21 01:26:52,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 32 [2021-11-21 01:26:52,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:52,441 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:26:52,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [545978716] [2021-11-21 01:26:52,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [545978716] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:26:52,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1603831957] [2021-11-21 01:26:52,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:52,442 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:26:52,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:26:52,450 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:26:52,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-21 01:26:52,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:52,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-21 01:26:52,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:52,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-21 01:26:52,991 INFO L354 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2021-11-21 01:26:52,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 27 [2021-11-21 01:26:53,220 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 01:26:53,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2021-11-21 01:26:53,394 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 01:26:53,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 36 [2021-11-21 01:26:53,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:53,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:53,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-11-21 01:26:53,714 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-21 01:26:53,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 32 [2021-11-21 01:26:53,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:53,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1603831957] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:26:53,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009730745] [2021-11-21 01:26:53,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:53,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:26:53,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:26:53,798 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:26:53,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-21 01:26:53,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:53,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 01:26:53,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:53,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-21 01:26:54,014 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-11-21 01:26:54,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 37 [2021-11-21 01:26:54,316 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 01:26:54,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 43 [2021-11-21 01:26:54,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 44 [2021-11-21 01:26:54,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:54,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:58,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2021-11-21 01:27:10,853 INFO L354 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2021-11-21 01:27:10,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 74 [2021-11-21 01:27:10,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:10,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009730745] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:27:10,995 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:27:10,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9, 8, 8, 8] total 26 [2021-11-21 01:27:10,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395026326] [2021-11-21 01:27:10,996 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:27:10,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-21 01:27:10,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:27:10,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-21 01:27:10,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=610, Unknown=6, NotChecked=0, Total=702 [2021-11-21 01:27:10,998 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 27 states, 26 states have (on average 2.5) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:27:12,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:27:12,605 INFO L93 Difference]: Finished difference Result 119 states and 127 transitions. [2021-11-21 01:27:12,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-21 01:27:12,606 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-21 01:27:12,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:27:12,608 INFO L225 Difference]: With dead ends: 119 [2021-11-21 01:27:12,608 INFO L226 Difference]: Without dead ends: 119 [2021-11-21 01:27:12,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 88 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=202, Invalid=982, Unknown=6, NotChecked=0, Total=1190 [2021-11-21 01:27:12,610 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 118 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 309 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:27:12,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 431 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 247 Invalid, 0 Unknown, 309 Unchecked, 0.8s Time] [2021-11-21 01:27:12,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-21 01:27:12,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 68. [2021-11-21 01:27:12,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 57 states have (on average 1.280701754385965) internal successors, (73), 67 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:27:12,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2021-11-21 01:27:12,615 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 21 [2021-11-21 01:27:12,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:27:12,615 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2021-11-21 01:27:12,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:27:12,616 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2021-11-21 01:27:12,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-21 01:27:12,617 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:27:12,617 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:27:12,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-21 01:27:12,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-21 01:27:13,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-21 01:27:13,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:27:13,230 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-21 01:27:13,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:27:13,231 INFO L85 PathProgramCache]: Analyzing trace with hash 717052318, now seen corresponding path program 1 times [2021-11-21 01:27:13,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:27:13,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [463924593] [2021-11-21 01:27:13,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:27:13,232 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:27:13,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:27:13,232 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:27:13,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-21 01:27:13,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:27:13,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-21 01:27:13,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:27:13,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:27:13,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-21 01:27:13,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:27:13,671 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-21 01:27:13,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-11-21 01:27:13,710 INFO L354 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2021-11-21 01:27:13,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 26 [2021-11-21 01:27:13,928 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 01:27:13,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 46 [2021-11-21 01:27:13,965 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 01:27:13,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 46 [2021-11-21 01:27:14,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-11-21 01:27:14,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-21 01:27:14,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:14,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:27:15,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 103 [2021-11-21 01:27:15,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 136 [2021-11-21 01:27:17,987 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_append_~item~0#1.base_34| (_ BitVec 32))) (or (let ((.cse0 (bvadd |c_ULTIMATE.start_append_~item~0#1.offset| (_ bv8 32)))) (and (= |c_ULTIMATE.start_main_~#list~0#1.base| |c_ULTIMATE.start_append_~plist#1.base|) (= |c_ULTIMATE.start_main_~#list~0#1.offset| |c_ULTIMATE.start_append_~plist#1.offset|) (bvule .cse0 (select (store |c_#length| |v_ULTIMATE.start_append_~item~0#1.base_34| (_ bv8 32)) |c_ULTIMATE.start_append_~item~0#1.base|)) (bvule (bvadd |c_ULTIMATE.start_append_~item~0#1.offset| (_ bv4 32)) .cse0))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_append_~item~0#1.base_34|))))))) is different from false [2021-11-21 01:27:18,110 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-21 01:27:18,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 49 [2021-11-21 01:27:18,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-11-21 01:27:18,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:18,645 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:27:18,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [463924593] [2021-11-21 01:27:18,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [463924593] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:27:18,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1368810489] [2021-11-21 01:27:18,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:27:18,646 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:27:18,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:27:18,656 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:27:18,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-21 01:27:18,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:27:18,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-21 01:27:18,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:27:18,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:27:18,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:27:19,277 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:27:19,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 01:27:19,298 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:27:19,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-21 01:27:19,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:27:19,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-21 01:27:20,062 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-21 01:27:20,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2021-11-21 01:27:20,112 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-21 01:27:20,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-11-21 01:27:20,520 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 01:27:20,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 50 [2021-11-21 01:27:20,549 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 01:27:20,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 42 [2021-11-21 01:27:20,817 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 01:27:20,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 50 [2021-11-21 01:27:20,823 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 01:27:20,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 24 [2021-11-21 01:27:20,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:20,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:27:21,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 103 [2021-11-21 01:27:21,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 136 [2021-11-21 01:27:21,935 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-21 01:27:21,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-11-21 01:27:43,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:43,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1368810489] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:27:43,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569874094] [2021-11-21 01:27:43,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:27:43,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:27:43,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:27:43,181 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:27:43,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-21 01:27:43,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:27:43,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-21 01:27:43,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:27:43,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-21 01:27:43,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:27:43,909 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-21 01:27:43,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-11-21 01:27:43,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-21 01:27:44,051 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 01:27:44,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 46 [2021-11-21 01:27:44,084 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 01:27:44,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 46 [2021-11-21 01:27:44,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-11-21 01:27:44,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-21 01:27:44,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:44,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:27:45,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 103 [2021-11-21 01:27:45,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 136 [2021-11-21 01:27:45,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2021-11-21 01:27:45,815 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-21 01:27:45,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 57 [2021-11-21 01:27:46,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:46,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569874094] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:27:46,029 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:27:46,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10, 9, 8, 8] total 30 [2021-11-21 01:27:46,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509277370] [2021-11-21 01:27:46,030 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:27:46,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-21 01:27:46,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:27:46,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-21 01:27:46,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=742, Unknown=7, NotChecked=56, Total=930 [2021-11-21 01:27:46,032 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 31 states, 30 states have (on average 2.533333333333333) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:27:48,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:27:48,092 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2021-11-21 01:27:48,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 01:27:48,093 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.533333333333333) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-21 01:27:48,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:27:48,094 INFO L225 Difference]: With dead ends: 68 [2021-11-21 01:27:48,094 INFO L226 Difference]: Without dead ends: 68 [2021-11-21 01:27:48,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 89 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 27.0s TimeCoverageRelationStatistics Valid=221, Invalid=966, Unknown=7, NotChecked=66, Total=1260 [2021-11-21 01:27:48,096 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 56 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:27:48,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 373 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 158 Invalid, 0 Unknown, 203 Unchecked, 0.7s Time] [2021-11-21 01:27:48,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-21 01:27:48,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-11-21 01:27:48,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 66 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:27:48,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2021-11-21 01:27:48,100 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 21 [2021-11-21 01:27:48,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:27:48,101 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2021-11-21 01:27:48,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.533333333333333) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:27:48,101 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2021-11-21 01:27:48,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-21 01:27:48,102 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:27:48,102 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:27:48,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-21 01:27:48,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-21 01:27:48,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-21 01:27:48,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:27:48,718 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-21 01:27:48,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:27:48,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1488017493, now seen corresponding path program 1 times [2021-11-21 01:27:48,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:27:48,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1677675192] [2021-11-21 01:27:48,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:27:48,719 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:27:48,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:27:48,721 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:27:48,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-21 01:27:48,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:27:48,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:27:48,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:27:48,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-21 01:27:48,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-21 01:27:49,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:49,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:27:49,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-11-21 01:27:49,273 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-21 01:27:49,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 34 [2021-11-21 01:27:49,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:49,381 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:27:49,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1677675192] [2021-11-21 01:27:49,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1677675192] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:27:49,382 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:27:49,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-21 01:27:49,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380037822] [2021-11-21 01:27:49,382 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:27:49,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:27:49,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:27:49,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:27:49,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:27:49,384 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:27:49,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:27:49,796 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2021-11-21 01:27:49,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:27:49,797 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-21 01:27:49,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:27:49,798 INFO L225 Difference]: With dead ends: 66 [2021-11-21 01:27:49,798 INFO L226 Difference]: Without dead ends: 66 [2021-11-21 01:27:49,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:27:49,801 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 47 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:27:49,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 73 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 102 Invalid, 0 Unknown, 16 Unchecked, 0.4s Time] [2021-11-21 01:27:49,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-21 01:27:49,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-11-21 01:27:49,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:27:49,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-11-21 01:27:49,804 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 22 [2021-11-21 01:27:49,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:27:49,805 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-11-21 01:27:49,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:27:49,805 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-11-21 01:27:49,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-21 01:27:49,809 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:27:49,809 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:27:49,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-21 01:27:50,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:27:50,022 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-21 01:27:50,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:27:50,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1116098075, now seen corresponding path program 1 times [2021-11-21 01:27:50,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:27:50,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2037223781] [2021-11-21 01:27:50,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:27:50,024 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:27:50,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:27:50,025 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:27:50,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-21 01:27:50,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:27:50,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 01:27:50,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:27:50,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:27:50,160 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:27:50,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-21 01:27:50,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:27:50,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-21 01:27:50,464 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-21 01:27:50,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 25 [2021-11-21 01:27:50,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:50,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:27:50,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2021-11-21 01:27:50,655 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:27:50,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 49 [2021-11-21 01:27:50,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:50,868 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:27:50,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2037223781] [2021-11-21 01:27:50,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2037223781] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:27:50,869 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:27:50,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 6 [2021-11-21 01:27:50,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703523966] [2021-11-21 01:27:50,869 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:27:50,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:27:50,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:27:50,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:27:50,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:27:50,870 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:27:51,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:27:51,248 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2021-11-21 01:27:51,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:27:51,249 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-21 01:27:51,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:27:51,250 INFO L225 Difference]: With dead ends: 66 [2021-11-21 01:27:51,250 INFO L226 Difference]: Without dead ends: 66 [2021-11-21 01:27:51,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:27:51,251 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 49 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:27:51,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 77 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 79 Invalid, 0 Unknown, 31 Unchecked, 0.2s Time] [2021-11-21 01:27:51,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-21 01:27:51,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-11-21 01:27:51,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 64 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:27:51,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2021-11-21 01:27:51,255 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 23 [2021-11-21 01:27:51,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:27:51,255 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2021-11-21 01:27:51,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:27:51,255 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2021-11-21 01:27:51,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-21 01:27:51,256 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:27:51,257 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:27:51,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-21 01:27:51,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:27:51,469 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-21 01:27:51,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:27:51,469 INFO L85 PathProgramCache]: Analyzing trace with hash -599596191, now seen corresponding path program 1 times [2021-11-21 01:27:51,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:27:51,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [218223488] [2021-11-21 01:27:51,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:27:51,470 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:27:51,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:27:51,471 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:27:51,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-21 01:27:51,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 01:27:51,578 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-21 01:27:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 01:27:51,711 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-11-21 01:27:51,711 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-21 01:27:51,713 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_LEAK (40 of 41 remaining) [2021-11-21 01:27:51,715 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (39 of 41 remaining) [2021-11-21 01:27:51,715 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (38 of 41 remaining) [2021-11-21 01:27:51,716 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (37 of 41 remaining) [2021-11-21 01:27:51,716 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (36 of 41 remaining) [2021-11-21 01:27:51,716 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (35 of 41 remaining) [2021-11-21 01:27:51,716 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (34 of 41 remaining) [2021-11-21 01:27:51,716 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION (33 of 41 remaining) [2021-11-21 01:27:51,717 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION (32 of 41 remaining) [2021-11-21 01:27:51,717 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION (31 of 41 remaining) [2021-11-21 01:27:51,717 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION (30 of 41 remaining) [2021-11-21 01:27:51,717 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION (29 of 41 remaining) [2021-11-21 01:27:51,717 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION (28 of 41 remaining) [2021-11-21 01:27:51,718 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION (27 of 41 remaining) [2021-11-21 01:27:51,718 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION (26 of 41 remaining) [2021-11-21 01:27:51,718 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION (25 of 41 remaining) [2021-11-21 01:27:51,718 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION (24 of 41 remaining) [2021-11-21 01:27:51,719 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATION (23 of 41 remaining) [2021-11-21 01:27:51,719 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION (22 of 41 remaining) [2021-11-21 01:27:51,719 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATION (21 of 41 remaining) [2021-11-21 01:27:51,719 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATION (20 of 41 remaining) [2021-11-21 01:27:51,719 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATION (19 of 41 remaining) [2021-11-21 01:27:51,720 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATION (18 of 41 remaining) [2021-11-21 01:27:51,720 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE (17 of 41 remaining) [2021-11-21 01:27:51,720 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE (16 of 41 remaining) [2021-11-21 01:27:51,720 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE (15 of 41 remaining) [2021-11-21 01:27:51,721 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATION (14 of 41 remaining) [2021-11-21 01:27:51,721 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATION (13 of 41 remaining) [2021-11-21 01:27:51,721 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27REQUIRES_VIOLATION (12 of 41 remaining) [2021-11-21 01:27:51,721 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28REQUIRES_VIOLATION (11 of 41 remaining) [2021-11-21 01:27:51,722 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29REQUIRES_VIOLATION (10 of 41 remaining) [2021-11-21 01:27:51,722 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr30REQUIRES_VIOLATION (9 of 41 remaining) [2021-11-21 01:27:51,722 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr31REQUIRES_VIOLATION (8 of 41 remaining) [2021-11-21 01:27:51,722 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr32REQUIRES_VIOLATION (7 of 41 remaining) [2021-11-21 01:27:51,722 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr33REQUIRES_VIOLATION (6 of 41 remaining) [2021-11-21 01:27:51,723 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr34REQUIRES_VIOLATION (5 of 41 remaining) [2021-11-21 01:27:51,723 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE (4 of 41 remaining) [2021-11-21 01:27:51,723 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE (3 of 41 remaining) [2021-11-21 01:27:51,723 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE (2 of 41 remaining) [2021-11-21 01:27:51,724 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr38REQUIRES_VIOLATION (1 of 41 remaining) [2021-11-21 01:27:51,724 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr39REQUIRES_VIOLATION (0 of 41 remaining) [2021-11-21 01:27:51,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-21 01:27:51,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:27:51,937 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:27:51,940 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-21 01:27:51,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 01:27:51 BoogieIcfgContainer [2021-11-21 01:27:51,985 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-21 01:27:51,986 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-21 01:27:51,986 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-21 01:27:51,986 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-21 01:27:51,987 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:26:31" (3/4) ... [2021-11-21 01:27:51,990 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-21 01:27:51,990 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-21 01:27:51,991 INFO L158 Benchmark]: Toolchain (without parser) took 81415.05ms. Allocated memory was 69.2MB in the beginning and 98.6MB in the end (delta: 29.4MB). Free memory was 47.8MB in the beginning and 38.4MB in the end (delta: 9.4MB). Peak memory consumption was 39.3MB. Max. memory is 16.1GB. [2021-11-21 01:27:51,991 INFO L158 Benchmark]: CDTParser took 0.71ms. Allocated memory is still 69.2MB. Free memory is still 49.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:27:51,991 INFO L158 Benchmark]: CACSL2BoogieTranslator took 486.58ms. Allocated memory is still 69.2MB. Free memory was 47.5MB in the beginning and 45.8MB in the end (delta: 1.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-21 01:27:51,992 INFO L158 Benchmark]: Boogie Procedure Inliner took 67.36ms. Allocated memory is still 69.2MB. Free memory was 45.8MB in the beginning and 43.6MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:27:51,992 INFO L158 Benchmark]: Boogie Preprocessor took 59.73ms. Allocated memory is still 69.2MB. Free memory was 43.6MB in the beginning and 42.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:27:51,993 INFO L158 Benchmark]: RCFGBuilder took 762.38ms. Allocated memory is still 69.2MB. Free memory was 42.1MB in the beginning and 48.3MB in the end (delta: -6.1MB). Peak memory consumption was 18.7MB. Max. memory is 16.1GB. [2021-11-21 01:27:51,993 INFO L158 Benchmark]: TraceAbstraction took 80028.37ms. Allocated memory was 69.2MB in the beginning and 98.6MB in the end (delta: 29.4MB). Free memory was 47.6MB in the beginning and 38.4MB in the end (delta: 9.3MB). Peak memory consumption was 37.8MB. Max. memory is 16.1GB. [2021-11-21 01:27:51,993 INFO L158 Benchmark]: Witness Printer took 4.56ms. Allocated memory is still 98.6MB. Free memory is still 38.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:27:51,996 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.71ms. Allocated memory is still 69.2MB. Free memory is still 49.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 486.58ms. Allocated memory is still 69.2MB. Free memory was 47.5MB in the beginning and 45.8MB in the end (delta: 1.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 67.36ms. Allocated memory is still 69.2MB. Free memory was 45.8MB in the beginning and 43.6MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 59.73ms. Allocated memory is still 69.2MB. Free memory was 43.6MB in the beginning and 42.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 762.38ms. Allocated memory is still 69.2MB. Free memory was 42.1MB in the beginning and 48.3MB in the end (delta: -6.1MB). Peak memory consumption was 18.7MB. Max. memory is 16.1GB. * TraceAbstraction took 80028.37ms. Allocated memory was 69.2MB in the beginning and 98.6MB in the end (delta: 29.4MB). Free memory was 47.6MB in the beginning and 38.4MB in the end (delta: 9.3MB). Peak memory consumption was 37.8MB. Max. memory is 16.1GB. * Witness Printer took 4.56ms. Allocated memory is still 98.6MB. Free memory is still 38.4MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 537]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 537. Possible FailurePath: [L539] struct item *list = ((void *)0); VAL [list={10:0}] [L541] CALL append(&list) [L530] struct item *item = malloc(sizeof *item); [L531] EXPR \read(**plist) VAL [\read(**plist)={0:0}, item={3:0}, plist={10:0}, plist={10:0}] [L531] item->next = *plist VAL [\read(**plist)={0:0}, item={3:0}, plist={10:0}, plist={10:0}] [L532] EXPR item->next VAL [item={3:0}, item->next={0:0}, plist={10:0}, plist={10:0}] [L532-L534] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L532-L534] EXPR (item->next) ? item->next->data : malloc(sizeof *item) VAL [(item->next) ? item->next->data : malloc(sizeof *item)={7:0}, item={3:0}, item->next={0:0}, malloc(sizeof *item)={7:0}, plist={10:0}, plist={10:0}] [L532-L534] item->data = (item->next) ? item->next->data : malloc(sizeof *item) VAL [(item->next) ? item->next->data : malloc(sizeof *item)={7:0}, item={3:0}, item->next={0:0}, malloc(sizeof *item)={7:0}, plist={10:0}, plist={10:0}] [L535] *plist = item VAL [item={3:0}, plist={10:0}, plist={10:0}] [L541] RET append(&list) [L542] COND FALSE !(__VERIFIER_nondet_int()) [L543] \read(*list) VAL [\read(*list)={3:0}, list={10:0}] [L543] COND TRUE \read(*list) [L544] EXPR \read(*list) VAL [\read(*list)={3:0}, list={10:0}] [L544] EXPR list->next VAL [\read(*list)={3:0}, list={10:0}, list->next={0:0}] [L544] struct item *next = list->next; [L545] EXPR \read(*list) VAL [\read(*list)={3:0}, list={10:0}, next={0:0}] [L545] free(list) VAL [\read(*list)={3:0}, list={10:0}, next={0:0}] [L545] free(list) VAL [\read(*list)={3:0}, list={10:0}, next={0:0}] [L545] free(list) [L546] list = next VAL [list={10:0}, next={0:0}] [L548] \read(*list) VAL [\read(*list)={0:0}, list={10:0}, next={0:0}] [L548] COND FALSE !(\read(*list)) [L553] return 0; [L539] struct item *list = ((void *)0); [L553] return 0; VAL [\result=0, next={0:0}] - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 81 locations, 41 error locations. Started 1 CEGAR loops. OverallTime: 79.9s, OverallIterations: 18, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 9.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1331 SdHoareTripleChecker+Valid, 5.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1331 mSDsluCounter, 2376 SdHoareTripleChecker+Invalid, 5.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 838 IncrementalHoareTripleChecker+Unchecked, 1739 mSDsCounter, 97 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1435 IncrementalHoareTripleChecker+Invalid, 2370 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 97 mSolverCounterUnsat, 637 mSDtfsCounter, 1435 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 662 GetRequests, 477 SyntacticMatches, 21 SemanticMatches, 164 ConstructedPredicates, 1 IntricatePredicates, 3 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 51.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=0, InterpolantAutomatonStates: 112, 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, 114 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 63.6s InterpolantComputationTime, 356 NumberOfCodeBlocks, 356 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 616 ConstructedInterpolants, 99 QuantifiedInterpolants, 9214 SizeOfPredicates, 234 NumberOfNonLiveVariables, 1848 ConjunctsInSsa, 236 ConjunctsInUnsatCore, 42 InterpolantComputations, 30 PerfectInterpolantSequences, 12/72 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 could not prove your program: unable to determine feasibility of some traces [2021-11-21 01:27:52,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_247019dc-b8d4-4614-87bd-e1210cadc80c/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample