./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c --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_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/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_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/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_40817e16-4fa4-436f-99ca-5fa568eed998/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 6ef2b56a2f4ebf2e6f7f4ededf8760f087ff726b08e36644d8dcb52a8d087cd1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:43:16,563 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:43:16,566 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:43:16,620 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:43:16,621 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:43:16,625 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:43:16,627 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:43:16,630 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:43:16,633 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:43:16,638 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:43:16,639 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:43:16,641 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:43:16,641 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:43:16,644 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:43:16,645 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:43:16,650 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:43:16,651 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:43:16,652 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:43:16,654 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:43:16,662 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:43:16,663 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:43:16,665 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:43:16,668 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:43:16,669 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:43:16,678 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:43:16,679 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:43:16,679 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:43:16,681 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:43:16,682 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:43:16,683 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:43:16,684 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:43:16,685 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:43:16,687 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:43:16,688 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:43:16,690 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:43:16,690 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:43:16,691 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:43:16,691 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:43:16,691 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:43:16,692 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:43:16,693 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:43:16,694 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-21 00:43:16,734 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:43:16,734 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:43:16,735 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:43:16,735 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:43:16,736 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:43:16,737 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:43:16,737 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:43:16,737 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:43:16,737 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:43:16,737 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:43:16,738 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:43:16,739 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:43:16,739 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:43:16,739 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:43:16,739 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:43:16,739 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:43:16,740 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:43:16,740 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:43:16,741 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-21 00:43:16,741 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-21 00:43:16,741 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:43:16,741 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:43:16,742 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 00:43:16,746 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:43:16,746 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:43:16,746 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:43:16,746 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-21 00:43:16,746 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-21 00:43:16,747 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-21 00:43:16,747 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:43:16,747 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-21 00:43:16,747 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:43:16,748 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:43:16,748 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:43:16,748 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:43:16,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:43:16,748 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:43:16,749 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:43:16,749 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:43:16,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:43:16,749 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:43:16,749 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:43:16,749 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_40817e16-4fa4-436f-99ca-5fa568eed998/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ef2b56a2f4ebf2e6f7f4ededf8760f087ff726b08e36644d8dcb52a8d087cd1 [2021-11-21 00:43:17,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:43:17,061 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:43:17,064 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:43:17,065 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:43:17,066 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:43:17,067 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c [2021-11-21 00:43:17,138 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/data/280b8f88b/ba5dc7a612d240eca812c7ca1eeabe78/FLAGa49b150a2 [2021-11-21 00:43:17,576 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:43:17,576 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c [2021-11-21 00:43:17,582 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/data/280b8f88b/ba5dc7a612d240eca812c7ca1eeabe78/FLAGa49b150a2 [2021-11-21 00:43:17,595 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/data/280b8f88b/ba5dc7a612d240eca812c7ca1eeabe78 [2021-11-21 00:43:17,598 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:43:17,599 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:43:17,601 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:43:17,601 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:43:17,604 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:43:17,605 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:43:17" (1/1) ... [2021-11-21 00:43:17,607 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2068b20d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:43:17, skipping insertion in model container [2021-11-21 00:43:17,607 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:43:17" (1/1) ... [2021-11-21 00:43:17,614 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:43:17,626 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:43:17,811 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:43:17,818 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:43:17,832 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:43:17,845 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:43:17,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:43:17 WrapperNode [2021-11-21 00:43:17,846 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:43:17,847 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:43:17,847 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:43:17,847 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:43:17,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:43:17" (1/1) ... [2021-11-21 00:43:17,862 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:43:17" (1/1) ... [2021-11-21 00:43:17,888 INFO L137 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2021-11-21 00:43:17,888 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:43:17,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:43:17,890 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:43:17,890 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:43:17,897 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:43:17" (1/1) ... [2021-11-21 00:43:17,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:43:17" (1/1) ... [2021-11-21 00:43:17,909 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:43:17" (1/1) ... [2021-11-21 00:43:17,910 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:43:17" (1/1) ... [2021-11-21 00:43:17,919 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:43:17" (1/1) ... [2021-11-21 00:43:17,928 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:43:17" (1/1) ... [2021-11-21 00:43:17,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:43:17" (1/1) ... [2021-11-21 00:43:17,933 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:43:17,939 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:43:17,940 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:43:17,940 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:43:17,941 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:43:17" (1/1) ... [2021-11-21 00:43:17,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:43:17,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:43:17,975 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:43:18,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:43:18,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:43:18,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:43:18,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:43:18,026 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:43:18,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:43:18,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:43:18,099 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:43:18,101 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:43:18,322 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:43:18,375 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:43:18,375 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-21 00:43:18,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:43:18 BoogieIcfgContainer [2021-11-21 00:43:18,377 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:43:18,379 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:43:18,379 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:43:18,382 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:43:18,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:43:17" (1/3) ... [2021-11-21 00:43:18,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@583fab02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:43:18, skipping insertion in model container [2021-11-21 00:43:18,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:43:17" (2/3) ... [2021-11-21 00:43:18,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@583fab02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:43:18, skipping insertion in model container [2021-11-21 00:43:18,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:43:18" (3/3) ... [2021-11-21 00:43:18,385 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength6.c [2021-11-21 00:43:18,389 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:43:18,390 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-11-21 00:43:18,433 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:43:18,440 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 00:43:18,441 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-11-21 00:43:18,454 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 10 states have (on average 2.2) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:18,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-21 00:43:18,460 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:18,460 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-21 00:43:18,461 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-21 00:43:18,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:18,471 INFO L85 PathProgramCache]: Analyzing trace with hash 3271901, now seen corresponding path program 1 times [2021-11-21 00:43:18,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:18,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462139968] [2021-11-21 00:43:18,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:18,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:18,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:18,758 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 00:43:18,762 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:18,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462139968] [2021-11-21 00:43:18,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462139968] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:18,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:18,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:43:18,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643398440] [2021-11-21 00:43:18,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:18,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:43:18,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:18,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:43:18,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:43:18,802 INFO L87 Difference]: Start difference. First operand has 19 states, 10 states have (on average 2.2) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 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 00:43:18,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:18,892 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-11-21 00:43:18,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:43:18,895 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 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 00:43:18,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:18,903 INFO L225 Difference]: With dead ends: 37 [2021-11-21 00:43:18,903 INFO L226 Difference]: Without dead ends: 35 [2021-11-21 00:43:18,906 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 00:43:18,913 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:18,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 16 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:43:18,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-21 00:43:18,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2021-11-21 00:43:18,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:18,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-11-21 00:43:18,956 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2021-11-21 00:43:18,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:18,956 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-11-21 00:43:18,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 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 00:43:18,956 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-11-21 00:43:18,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-21 00:43:18,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:18,957 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-21 00:43:18,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:43:18,958 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-21 00:43:18,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:18,959 INFO L85 PathProgramCache]: Analyzing trace with hash 3197824, now seen corresponding path program 1 times [2021-11-21 00:43:18,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:18,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755438367] [2021-11-21 00:43:18,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:18,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:18,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:18,992 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 00:43:18,993 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:18,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755438367] [2021-11-21 00:43:18,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755438367] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:18,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:18,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:43:18,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417686421] [2021-11-21 00:43:18,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:18,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:43:18,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:18,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:43:18,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:43:18,996 INFO L87 Difference]: Start difference. First operand 20 states and 23 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 00:43:19,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:19,030 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2021-11-21 00:43:19,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:43:19,031 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 00:43:19,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:19,032 INFO L225 Difference]: With dead ends: 37 [2021-11-21 00:43:19,032 INFO L226 Difference]: Without dead ends: 37 [2021-11-21 00:43:19,032 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 00:43:19,034 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:19,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 19 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:43:19,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-21 00:43:19,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2021-11-21 00:43:19,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:19,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-11-21 00:43:19,040 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 4 [2021-11-21 00:43:19,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:19,040 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-11-21 00:43:19,041 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 00:43:19,041 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-11-21 00:43:19,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-21 00:43:19,041 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:19,041 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-21 00:43:19,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:43:19,042 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-21 00:43:19,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:19,043 INFO L85 PathProgramCache]: Analyzing trace with hash 3199854, now seen corresponding path program 1 times [2021-11-21 00:43:19,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:19,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714578513] [2021-11-21 00:43:19,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:19,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:19,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:19,101 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 00:43:19,102 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:19,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714578513] [2021-11-21 00:43:19,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714578513] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:19,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:19,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:43:19,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013184545] [2021-11-21 00:43:19,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:19,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:43:19,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:19,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:43:19,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:43:19,113 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 3 states, 3 states have (on average 1.3333333333333333) 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 00:43:19,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:19,139 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-11-21 00:43:19,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:43:19,140 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) 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 00:43:19,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:19,141 INFO L225 Difference]: With dead ends: 25 [2021-11-21 00:43:19,141 INFO L226 Difference]: Without dead ends: 25 [2021-11-21 00:43:19,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:43:19,143 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:19,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 18 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:43:19,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-21 00:43:19,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-11-21 00:43:19,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 21 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 00:43:19,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-11-21 00:43:19,148 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 4 [2021-11-21 00:43:19,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:19,148 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-11-21 00:43:19,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) 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 00:43:19,149 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-11-21 00:43:19,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-21 00:43:19,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:19,149 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-21 00:43:19,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:43:19,150 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-21 00:43:19,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:19,151 INFO L85 PathProgramCache]: Analyzing trace with hash 99132597, now seen corresponding path program 1 times [2021-11-21 00:43:19,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:19,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107445429] [2021-11-21 00:43:19,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:19,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:19,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:19,185 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 00:43:19,186 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:19,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107445429] [2021-11-21 00:43:19,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107445429] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:19,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:19,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:43:19,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567638707] [2021-11-21 00:43:19,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:19,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:43:19,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:19,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:43:19,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:43:19,189 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) 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 00:43:19,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:19,226 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-11-21 00:43:19,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:43:19,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) 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 00:43:19,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:19,228 INFO L225 Difference]: With dead ends: 21 [2021-11-21 00:43:19,228 INFO L226 Difference]: Without dead ends: 21 [2021-11-21 00:43:19,228 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 00:43:19,230 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:19,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 7 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:43:19,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-21 00:43:19,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-21 00:43:19,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 20 states have internal predecessors, (24), 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 00:43:19,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-11-21 00:43:19,235 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 5 [2021-11-21 00:43:19,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:19,235 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-11-21 00:43:19,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) 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 00:43:19,236 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-11-21 00:43:19,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-21 00:43:19,236 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:19,236 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-21 00:43:19,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 00:43:19,237 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-21 00:43:19,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:19,237 INFO L85 PathProgramCache]: Analyzing trace with hash 99132598, now seen corresponding path program 1 times [2021-11-21 00:43:19,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:19,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391355205] [2021-11-21 00:43:19,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:19,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:19,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:19,318 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 00:43:19,318 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:19,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391355205] [2021-11-21 00:43:19,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391355205] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:19,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:19,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:43:19,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101604103] [2021-11-21 00:43:19,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:19,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:43:19,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:19,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:43:19,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:43:19,321 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 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 00:43:19,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:19,381 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2021-11-21 00:43:19,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:43:19,381 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 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 00:43:19,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:19,382 INFO L225 Difference]: With dead ends: 22 [2021-11-21 00:43:19,382 INFO L226 Difference]: Without dead ends: 22 [2021-11-21 00:43:19,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:43:19,384 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 20 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:19,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 14 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:43:19,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-21 00:43:19,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-21 00:43:19,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 21 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 00:43:19,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-11-21 00:43:19,396 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 5 [2021-11-21 00:43:19,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:19,397 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-11-21 00:43:19,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 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 00:43:19,397 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-11-21 00:43:19,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 00:43:19,398 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:19,398 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-11-21 00:43:19,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 00:43:19,398 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-21 00:43:19,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:19,399 INFO L85 PathProgramCache]: Analyzing trace with hash 777198637, now seen corresponding path program 1 times [2021-11-21 00:43:19,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:19,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529803945] [2021-11-21 00:43:19,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:19,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:19,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:19,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:19,442 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:19,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529803945] [2021-11-21 00:43:19,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529803945] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:43:19,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949169091] [2021-11-21 00:43:19,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:19,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:43:19,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:43:19,447 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:43:19,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:43:19,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:19,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:43:19,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:43:19,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:19,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:43:19,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:19,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949169091] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:43:19,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1021560698] [2021-11-21 00:43:19,639 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-21 00:43:19,639 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:43:19,646 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:43:19,651 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:43:19,651 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:43:19,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:19,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-21 00:43:20,264 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 15 treesize of output 14 [2021-11-21 00:43:21,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:21,183 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 171 treesize of output 173 [2021-11-21 00:43:21,726 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 15 treesize of output 14 [2021-11-21 00:43:22,079 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:43:22,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1021560698] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:22,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:43:22,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3] total 8 [2021-11-21 00:43:22,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295191085] [2021-11-21 00:43:22,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:22,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:43:22,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:22,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:43:22,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-21 00:43:22,332 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 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 00:43:22,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:22,794 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-11-21 00:43:22,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:43:22,794 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 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 7 [2021-11-21 00:43:22,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:22,795 INFO L225 Difference]: With dead ends: 30 [2021-11-21 00:43:22,795 INFO L226 Difference]: Without dead ends: 30 [2021-11-21 00:43:22,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:43:22,797 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 11 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:22,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 13 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:43:22,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-21 00:43:22,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-11-21 00:43:22,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:22,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2021-11-21 00:43:22,802 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 7 [2021-11-21 00:43:22,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:22,802 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2021-11-21 00:43:22,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 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 00:43:22,802 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2021-11-21 00:43:22,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 00:43:22,803 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:22,803 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2021-11-21 00:43:22,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:43:23,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-21 00:43:23,004 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-21 00:43:23,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:23,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1676645975, now seen corresponding path program 1 times [2021-11-21 00:43:23,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:23,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527693753] [2021-11-21 00:43:23,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:23,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:23,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:23,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:23,119 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:23,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527693753] [2021-11-21 00:43:23,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527693753] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:43:23,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143399005] [2021-11-21 00:43:23,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:23,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:43:23,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:43:23,121 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:43:23,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:43:23,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:23,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-21 00:43:23,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:43:23,187 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-21 00:43:23,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-21 00:43:23,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:23,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:43:23,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:23,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143399005] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:43:23,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [535849142] [2021-11-21 00:43:23,358 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-21 00:43:23,359 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:43:23,359 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:43:23,359 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:43:23,359 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:43:23,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:23,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-21 00:43:23,726 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 10 treesize of output 9 [2021-11-21 00:43:24,443 INFO L354 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2021-11-21 00:43:24,443 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 202 treesize of output 208 [2021-11-21 00:43:24,916 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 15 treesize of output 14 [2021-11-21 00:43:25,259 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:43:25,532 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:43:25,533 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:43:25,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 10 [2021-11-21 00:43:25,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048866087] [2021-11-21 00:43:25,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:43:25,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 00:43:25,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:25,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 00:43:25,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-11-21 00:43:25,535 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:25,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:25,734 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2021-11-21 00:43:25,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 00:43:25,738 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-21 00:43:25,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:25,739 INFO L225 Difference]: With dead ends: 75 [2021-11-21 00:43:25,740 INFO L226 Difference]: Without dead ends: 75 [2021-11-21 00:43:25,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-11-21 00:43:25,741 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 90 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:25,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 18 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:43:25,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-21 00:43:25,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 47. [2021-11-21 00:43:25,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 40 states have (on average 1.45) internal successors, (58), 46 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 00:43:25,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2021-11-21 00:43:25,749 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 8 [2021-11-21 00:43:25,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:25,749 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2021-11-21 00:43:25,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:25,750 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2021-11-21 00:43:25,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 00:43:25,760 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:25,761 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:25,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:43:25,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:43:25,961 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-21 00:43:25,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:25,962 INFO L85 PathProgramCache]: Analyzing trace with hash 470214016, now seen corresponding path program 1 times [2021-11-21 00:43:25,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:25,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231715980] [2021-11-21 00:43:25,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:25,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:25,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:25,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 00:43:25,993 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:25,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231715980] [2021-11-21 00:43:25,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231715980] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:25,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:25,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:43:25,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447727615] [2021-11-21 00:43:25,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:25,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:43:25,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:25,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:43:25,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:43:25,995 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:26,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:26,014 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2021-11-21 00:43:26,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:43:26,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-21 00:43:26,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:26,017 INFO L225 Difference]: With dead ends: 45 [2021-11-21 00:43:26,017 INFO L226 Difference]: Without dead ends: 45 [2021-11-21 00:43:26,017 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 00:43:26,018 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:26,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 7 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:43:26,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-21 00:43:26,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-21 00:43:26,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.4) internal successors, (56), 44 states have internal predecessors, (56), 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 00:43:26,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2021-11-21 00:43:26,023 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 13 [2021-11-21 00:43:26,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:26,023 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2021-11-21 00:43:26,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:26,024 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2021-11-21 00:43:26,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 00:43:26,024 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:26,024 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:26,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 00:43:26,025 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-21 00:43:26,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:26,025 INFO L85 PathProgramCache]: Analyzing trace with hash 470214017, now seen corresponding path program 1 times [2021-11-21 00:43:26,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:26,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249266443] [2021-11-21 00:43:26,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:26,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:26,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:26,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 00:43:26,099 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:26,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249266443] [2021-11-21 00:43:26,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249266443] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:43:26,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310606658] [2021-11-21 00:43:26,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:26,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:43:26,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:43:26,100 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:43:26,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:43:26,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:26,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:43:26,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:43:26,231 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 00:43:26,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:43:26,281 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 00:43:26,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310606658] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:43:26,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [629670635] [2021-11-21 00:43:26,283 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 00:43:26,283 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:43:26,283 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:43:26,284 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:43:26,284 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:43:26,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:26,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-21 00:43:26,647 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 15 treesize of output 14 [2021-11-21 00:43:27,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:27,443 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 171 treesize of output 173 [2021-11-21 00:43:27,866 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 15 treesize of output 14 [2021-11-21 00:43:28,073 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 00:43:28,749 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 15 treesize of output 14 [2021-11-21 00:43:29,158 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 15 treesize of output 14 [2021-11-21 00:43:29,385 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 00:43:29,668 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 15 treesize of output 14 [2021-11-21 00:43:30,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:30,155 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 99 treesize of output 101 [2021-11-21 00:43:30,498 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 15 treesize of output 14 [2021-11-21 00:43:30,723 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 00:43:31,131 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 15 treesize of output 14 [2021-11-21 00:43:31,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:31,597 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 99 treesize of output 101 [2021-11-21 00:43:31,923 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 15 treesize of output 14 [2021-11-21 00:43:32,228 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:43:32,452 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:43:32,452 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:43:32,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 11 [2021-11-21 00:43:32,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064010447] [2021-11-21 00:43:32,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:43:32,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 00:43:32,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:32,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 00:43:32,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-11-21 00:43:32,454 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:32,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:32,707 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2021-11-21 00:43:32,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-21 00:43:32,709 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-21 00:43:32,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:32,710 INFO L225 Difference]: With dead ends: 61 [2021-11-21 00:43:32,710 INFO L226 Difference]: Without dead ends: 61 [2021-11-21 00:43:32,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=643, Unknown=0, NotChecked=0, Total=870 [2021-11-21 00:43:32,716 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 111 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:32,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 5 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:43:32,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-21 00:43:32,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2021-11-21 00:43:32,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.3061224489795917) internal successors, (64), 53 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 00:43:32,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-11-21 00:43:32,724 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 13 [2021-11-21 00:43:32,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:32,724 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-11-21 00:43:32,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:32,725 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2021-11-21 00:43:32,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-21 00:43:32,725 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:32,725 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1] [2021-11-21 00:43:32,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:43:32,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:43:32,946 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-21 00:43:32,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:32,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1961540342, now seen corresponding path program 2 times [2021-11-21 00:43:32,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:32,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601882947] [2021-11-21 00:43:32,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:32,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:32,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:33,165 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:33,165 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:33,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601882947] [2021-11-21 00:43:33,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601882947] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:43:33,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516820179] [2021-11-21 00:43:33,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:43:33,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:43:33,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:43:33,167 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:43:33,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:43:33,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-21 00:43:33,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:43:33,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 00:43:33,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:43:33,218 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-21 00:43:33,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-21 00:43:33,322 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-21 00:43:33,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:43:33,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516820179] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:33,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:43:33,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2021-11-21 00:43:33,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021088395] [2021-11-21 00:43:33,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:33,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:43:33,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:33,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:43:33,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:43:33,332 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:33,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:33,399 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2021-11-21 00:43:33,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:43:33,399 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-21 00:43:33,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:33,403 INFO L225 Difference]: With dead ends: 53 [2021-11-21 00:43:33,403 INFO L226 Difference]: Without dead ends: 53 [2021-11-21 00:43:33,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:43:33,404 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 25 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 6 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 00:43:33,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 6 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:43:33,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-21 00:43:33,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-21 00:43:33,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 52 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 00:43:33,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-11-21 00:43:33,419 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 17 [2021-11-21 00:43:33,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:33,420 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-11-21 00:43:33,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:33,420 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-11-21 00:43:33,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-21 00:43:33,422 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:33,422 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:33,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:43:33,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-21 00:43:33,642 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-21 00:43:33,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:33,642 INFO L85 PathProgramCache]: Analyzing trace with hash 720294201, now seen corresponding path program 1 times [2021-11-21 00:43:33,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:33,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391777411] [2021-11-21 00:43:33,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:33,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:33,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:33,763 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:33,763 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:33,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391777411] [2021-11-21 00:43:33,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391777411] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:43:33,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278005205] [2021-11-21 00:43:33,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:33,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:43:33,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:43:33,765 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:43:33,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:43:33,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:33,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 00:43:33,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:43:34,011 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:34,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:43:34,195 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:34,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278005205] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:43:34,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2026770798] [2021-11-21 00:43:34,198 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-21 00:43:34,198 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:43:34,198 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:43:34,199 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:43:34,199 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:43:34,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:34,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-21 00:43:34,547 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 10 treesize of output 9 [2021-11-21 00:43:35,153 INFO L354 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2021-11-21 00:43:35,154 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 202 treesize of output 208 [2021-11-21 00:43:35,554 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 15 treesize of output 14 [2021-11-21 00:43:35,769 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 00:43:36,307 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 15 treesize of output 14 [2021-11-21 00:43:36,591 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 15 treesize of output 14 [2021-11-21 00:43:36,799 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 00:43:37,102 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 15 treesize of output 14 [2021-11-21 00:43:37,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:37,496 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 105 treesize of output 107 [2021-11-21 00:43:37,856 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 15 treesize of output 14 [2021-11-21 00:43:38,008 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 00:43:38,265 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 00:43:38,266 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 2 case distinctions, treesize of input 49 treesize of output 48 [2021-11-21 00:43:38,560 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 15 treesize of output 14 [2021-11-21 00:43:38,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:38,975 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 105 treesize of output 107 [2021-11-21 00:43:39,285 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 15 treesize of output 14 [2021-11-21 00:43:39,499 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:43:39,917 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:43:39,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:43:39,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2021-11-21 00:43:39,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896420758] [2021-11-21 00:43:39,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:43:39,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-21 00:43:39,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:39,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-21 00:43:39,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=672, Unknown=0, NotChecked=0, Total=930 [2021-11-21 00:43:39,923 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 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 00:43:40,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:40,054 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2021-11-21 00:43:40,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-21 00:43:40,055 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 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) Word has length 27 [2021-11-21 00:43:40,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:40,056 INFO L225 Difference]: With dead ends: 108 [2021-11-21 00:43:40,056 INFO L226 Difference]: Without dead ends: 108 [2021-11-21 00:43:40,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=281, Invalid=711, Unknown=0, NotChecked=0, Total=992 [2021-11-21 00:43:40,057 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 45 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:40,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 31 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:43:40,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-21 00:43:40,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 101. [2021-11-21 00:43:40,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 97 states have (on average 1.1958762886597938) internal successors, (116), 100 states have internal predecessors, (116), 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 00:43:40,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 116 transitions. [2021-11-21 00:43:40,079 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 116 transitions. Word has length 27 [2021-11-21 00:43:40,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:40,080 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 116 transitions. [2021-11-21 00:43:40,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 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 00:43:40,082 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 116 transitions. [2021-11-21 00:43:40,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-21 00:43:40,084 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:40,084 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:40,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 00:43:40,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-21 00:43:40,308 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-21 00:43:40,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:40,308 INFO L85 PathProgramCache]: Analyzing trace with hash -516997703, now seen corresponding path program 2 times [2021-11-21 00:43:40,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:40,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906537244] [2021-11-21 00:43:40,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:40,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:40,582 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:40,582 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:40,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906537244] [2021-11-21 00:43:40,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906537244] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:43:40,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039990640] [2021-11-21 00:43:40,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:43:40,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:43:40,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:43:40,585 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:43:40,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 00:43:40,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-21 00:43:40,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:43:40,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:43:40,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:43:41,017 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-11-21 00:43:41,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:43:41,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039990640] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:41,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:43:41,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [17] total 19 [2021-11-21 00:43:41,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435253965] [2021-11-21 00:43:41,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:41,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:43:41,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:41,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:43:41,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2021-11-21 00:43:41,019 INFO L87 Difference]: Start difference. First operand 101 states and 116 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 00:43:41,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:41,042 INFO L93 Difference]: Finished difference Result 102 states and 116 transitions. [2021-11-21 00:43:41,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:43:41,042 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 51 [2021-11-21 00:43:41,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:41,043 INFO L225 Difference]: With dead ends: 102 [2021-11-21 00:43:41,043 INFO L226 Difference]: Without dead ends: 101 [2021-11-21 00:43:41,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2021-11-21 00:43:41,044 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:41,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 9 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 12 Unchecked, 0.0s Time] [2021-11-21 00:43:41,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-21 00:43:41,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-11-21 00:43:41,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 97 states have (on average 1.1855670103092784) internal successors, (115), 100 states have internal predecessors, (115), 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 00:43:41,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 115 transitions. [2021-11-21 00:43:41,051 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 115 transitions. Word has length 51 [2021-11-21 00:43:41,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:41,051 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 115 transitions. [2021-11-21 00:43:41,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 00:43:41,052 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 115 transitions. [2021-11-21 00:43:41,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-21 00:43:41,053 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:41,053 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:41,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 00:43:41,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:43:41,274 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-21 00:43:41,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:41,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1152945667, now seen corresponding path program 1 times [2021-11-21 00:43:41,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:41,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609721159] [2021-11-21 00:43:41,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:41,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:41,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:41,521 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:43:41,521 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:41,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609721159] [2021-11-21 00:43:41,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609721159] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:43:41,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322163420] [2021-11-21 00:43:41,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:41,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:43:41,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:43:41,526 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:43:41,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 00:43:41,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:41,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 00:43:41,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:43:42,118 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:43:42,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:43:42,669 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:43:42,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322163420] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:43:42,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1820691512] [2021-11-21 00:43:42,671 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-21 00:43:42,671 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:43:42,671 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:43:42,672 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:43:42,672 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:43:42,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:42,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-21 00:43:42,954 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 10 treesize of output 9 [2021-11-21 00:43:43,496 INFO L354 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2021-11-21 00:43:43,497 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 202 treesize of output 208 [2021-11-21 00:43:43,862 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 15 treesize of output 14 [2021-11-21 00:43:44,136 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 00:43:44,672 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 10 treesize of output 9 [2021-11-21 00:43:45,075 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 15 treesize of output 14 [2021-11-21 00:43:45,298 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 15 treesize of output 14 [2021-11-21 00:43:45,482 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 00:43:45,783 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 15 treesize of output 14 [2021-11-21 00:43:46,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:46,103 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 105 treesize of output 107 [2021-11-21 00:43:46,457 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 15 treesize of output 14 [2021-11-21 00:43:46,633 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 00:43:46,872 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 10 treesize of output 9 [2021-11-21 00:43:47,296 INFO L354 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2021-11-21 00:43:47,297 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 83 treesize of output 89 [2021-11-21 00:43:47,609 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 15 treesize of output 14 [2021-11-21 00:43:48,479 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 00:43:48,479 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 1 case distinctions, treesize of input 16 treesize of output 17 [2021-11-21 00:43:48,596 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:43:49,174 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:43:49,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:43:49,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 47 [2021-11-21 00:43:49,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864192539] [2021-11-21 00:43:49,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:43:49,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-21 00:43:49,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:49,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-21 00:43:49,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1010, Invalid=2070, Unknown=0, NotChecked=0, Total=3080 [2021-11-21 00:43:49,178 INFO L87 Difference]: Start difference. First operand 101 states and 115 transitions. Second operand has 47 states, 47 states have (on average 2.978723404255319) internal successors, (140), 47 states have internal predecessors, (140), 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 00:43:49,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:49,424 INFO L93 Difference]: Finished difference Result 212 states and 227 transitions. [2021-11-21 00:43:49,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-21 00:43:49,424 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.978723404255319) internal successors, (140), 47 states have internal predecessors, (140), 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 52 [2021-11-21 00:43:49,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:49,426 INFO L225 Difference]: With dead ends: 212 [2021-11-21 00:43:49,426 INFO L226 Difference]: Without dead ends: 212 [2021-11-21 00:43:49,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1057, Invalid=2135, Unknown=0, NotChecked=0, Total=3192 [2021-11-21 00:43:49,429 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 112 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:49,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 31 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:43:49,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-11-21 00:43:49,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 197. [2021-11-21 00:43:49,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 193 states have (on average 1.1761658031088082) internal successors, (227), 196 states have internal predecessors, (227), 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 00:43:49,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 227 transitions. [2021-11-21 00:43:49,450 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 227 transitions. Word has length 52 [2021-11-21 00:43:49,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:49,453 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 227 transitions. [2021-11-21 00:43:49,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.978723404255319) internal successors, (140), 47 states have internal predecessors, (140), 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 00:43:49,453 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 227 transitions. [2021-11-21 00:43:49,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-21 00:43:49,460 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:49,461 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:49,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 00:43:49,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:43:49,680 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-21 00:43:49,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:49,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1428466429, now seen corresponding path program 2 times [2021-11-21 00:43:49,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:49,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324534214] [2021-11-21 00:43:49,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:49,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:49,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:50,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 1 proven. 1335 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:43:50,341 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:50,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324534214] [2021-11-21 00:43:50,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324534214] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:43:50,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392197521] [2021-11-21 00:43:50,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:43:50,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:43:50,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:43:50,343 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:43:50,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 00:43:50,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-21 00:43:50,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:43:50,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:43:50,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:43:51,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1337 trivial. 0 not checked. [2021-11-21 00:43:51,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:43:51,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392197521] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:51,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:43:51,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [33] total 35 [2021-11-21 00:43:51,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402219384] [2021-11-21 00:43:51,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:51,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:43:51,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:51,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:43:51,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=658, Unknown=0, NotChecked=0, Total=1190 [2021-11-21 00:43:51,260 INFO L87 Difference]: Start difference. First operand 197 states and 227 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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 00:43:51,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:51,276 INFO L93 Difference]: Finished difference Result 196 states and 226 transitions. [2021-11-21 00:43:51,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:43:51,277 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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 100 [2021-11-21 00:43:51,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:51,279 INFO L225 Difference]: With dead ends: 196 [2021-11-21 00:43:51,279 INFO L226 Difference]: Without dead ends: 195 [2021-11-21 00:43:51,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=532, Invalid=658, Unknown=0, NotChecked=0, Total=1190 [2021-11-21 00:43:51,280 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:51,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 8 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 10 Unchecked, 0.0s Time] [2021-11-21 00:43:51,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-11-21 00:43:51,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2021-11-21 00:43:51,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 192 states have (on average 1.171875) internal successors, (225), 194 states have internal predecessors, (225), 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 00:43:51,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 225 transitions. [2021-11-21 00:43:51,286 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 225 transitions. Word has length 100 [2021-11-21 00:43:51,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:51,287 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 225 transitions. [2021-11-21 00:43:51,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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 00:43:51,287 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 225 transitions. [2021-11-21 00:43:51,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-21 00:43:51,289 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:51,289 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:51,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 00:43:51,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-21 00:43:51,510 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-21 00:43:51,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:51,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1428467405, now seen corresponding path program 1 times [2021-11-21 00:43:51,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:51,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789825644] [2021-11-21 00:43:51,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:51,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:51,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:52,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1338 backedges. 1 proven. 1335 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:43:52,246 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:52,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789825644] [2021-11-21 00:43:52,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789825644] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:43:52,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893903880] [2021-11-21 00:43:52,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:52,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:43:52,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:43:52,250 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:43:52,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 00:43:52,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:52,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-21 00:43:52,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:43:53,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1338 backedges. 1 proven. 1335 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:43:53,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:43:55,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1338 backedges. 1 proven. 1335 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:43:55,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893903880] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:43:55,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [887140317] [2021-11-21 00:43:55,466 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 00:43:55,467 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:43:55,467 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:43:55,467 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:43:55,467 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:43:55,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:55,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-21 00:43:55,734 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 15 treesize of output 14 [2021-11-21 00:43:56,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:56,309 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 171 treesize of output 173 [2021-11-21 00:43:56,694 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 15 treesize of output 14 [2021-11-21 00:43:56,919 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 00:43:57,588 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 10 treesize of output 9 [2021-11-21 00:43:57,818 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 15 treesize of output 14 [2021-11-21 00:43:58,080 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 00:43:58,319 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 15 treesize of output 14 [2021-11-21 00:43:58,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:58,746 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 99 treesize of output 101 [2021-11-21 00:43:59,107 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 15 treesize of output 14 [2021-11-21 00:43:59,301 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 00:43:59,524 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 10 treesize of output 9 [2021-11-21 00:43:59,939 INFO L354 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2021-11-21 00:43:59,940 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 89 treesize of output 95 [2021-11-21 00:44:00,236 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 15 treesize of output 14 [2021-11-21 00:44:01,060 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:44:01,705 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:44:01,705 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:44:01,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 95 [2021-11-21 00:44:01,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269401604] [2021-11-21 00:44:01,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:44:01,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-11-21 00:44:01,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:44:01,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-11-21 00:44:01,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3153, Invalid=7149, Unknown=0, NotChecked=0, Total=10302 [2021-11-21 00:44:01,711 INFO L87 Difference]: Start difference. First operand 195 states and 225 transitions. Second operand has 95 states, 95 states have (on average 2.9789473684210526) internal successors, (283), 95 states have internal predecessors, (283), 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 00:44:02,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:44:02,082 INFO L93 Difference]: Finished difference Result 208 states and 239 transitions. [2021-11-21 00:44:02,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-21 00:44:02,083 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.9789473684210526) internal successors, (283), 95 states have internal predecessors, (283), 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 100 [2021-11-21 00:44:02,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:44:02,084 INFO L225 Difference]: With dead ends: 208 [2021-11-21 00:44:02,084 INFO L226 Difference]: Without dead ends: 208 [2021-11-21 00:44:02,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2608 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3248, Invalid=7258, Unknown=0, NotChecked=0, Total=10506 [2021-11-21 00:44:02,088 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 134 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:44:02,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 33 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:44:02,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-21 00:44:02,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2021-11-21 00:44:02,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 204 states have (on average 1.1715686274509804) internal successors, (239), 206 states have internal predecessors, (239), 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 00:44:02,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 239 transitions. [2021-11-21 00:44:02,095 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 239 transitions. Word has length 100 [2021-11-21 00:44:02,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:44:02,095 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 239 transitions. [2021-11-21 00:44:02,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.9789473684210526) internal successors, (283), 95 states have internal predecessors, (283), 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 00:44:02,096 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 239 transitions. [2021-11-21 00:44:02,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-21 00:44:02,098 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:44:02,098 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:44:02,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 00:44:02,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-21 00:44:02,314 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-21 00:44:02,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:44:02,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1847233005, now seen corresponding path program 2 times [2021-11-21 00:44:02,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:44:02,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327761099] [2021-11-21 00:44:02,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:44:02,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:44:02,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:44:02,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1522 trivial. 0 not checked. [2021-11-21 00:44:02,481 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:44:02,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327761099] [2021-11-21 00:44:02,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327761099] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:44:02,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34357761] [2021-11-21 00:44:02,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:44:02,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:44:02,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:44:02,486 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:44:02,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 00:44:02,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 00:44:02,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:44:02,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 00:44:02,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:44:03,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1522 trivial. 0 not checked. [2021-11-21 00:44:03,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:44:03,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-11-21 00:44:03,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34357761] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:44:03,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2140524695] [2021-11-21 00:44:03,384 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 00:44:03,385 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:44:03,385 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:44:03,385 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:44:03,385 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:44:03,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:03,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-21 00:44:03,739 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 15 treesize of output 14 [2021-11-21 00:44:04,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:04,357 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 171 treesize of output 173 [2021-11-21 00:44:04,762 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 15 treesize of output 14 [2021-11-21 00:44:04,974 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 00:44:05,528 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 10 treesize of output 9 [2021-11-21 00:44:05,858 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 15 treesize of output 14 [2021-11-21 00:44:06,072 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 00:44:06,382 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 10 treesize of output 9 [2021-11-21 00:44:06,772 INFO L354 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2021-11-21 00:44:06,772 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 89 treesize of output 95 [2021-11-21 00:44:07,055 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 15 treesize of output 14 [2021-11-21 00:44:07,312 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 00:44:07,519 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 10 treesize of output 9 [2021-11-21 00:44:08,045 INFO L354 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2021-11-21 00:44:08,045 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 89 treesize of output 95 [2021-11-21 00:44:08,411 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 15 treesize of output 14 [2021-11-21 00:44:09,193 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:44:09,589 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:44:09,589 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:44:09,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 5] total 8 [2021-11-21 00:44:09,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803502150] [2021-11-21 00:44:09,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:44:09,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 00:44:09,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:44:09,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 00:44:09,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-11-21 00:44:09,591 INFO L87 Difference]: Start difference. First operand 207 states and 239 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:44:09,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:44:09,690 INFO L93 Difference]: Finished difference Result 420 states and 512 transitions. [2021-11-21 00:44:09,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:44:09,690 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-21 00:44:09,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:44:09,693 INFO L225 Difference]: With dead ends: 420 [2021-11-21 00:44:09,693 INFO L226 Difference]: Without dead ends: 420 [2021-11-21 00:44:09,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 304 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-11-21 00:44:09,694 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 54 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:44:09,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 26 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:44:09,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-11-21 00:44:09,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 406. [2021-11-21 00:44:09,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 403 states have (on average 1.2456575682382134) internal successors, (502), 405 states have internal predecessors, (502), 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 00:44:09,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 502 transitions. [2021-11-21 00:44:09,705 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 502 transitions. Word has length 106 [2021-11-21 00:44:09,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:44:09,706 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 502 transitions. [2021-11-21 00:44:09,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:44:09,706 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 502 transitions. [2021-11-21 00:44:09,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-21 00:44:09,707 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:44:09,707 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 34, 2, 1, 1, 1, 1] [2021-11-21 00:44:09,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 00:44:09,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:44:09,914 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-21 00:44:09,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:44:09,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1146724532, now seen corresponding path program 1 times [2021-11-21 00:44:09,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:44:09,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675633419] [2021-11-21 00:44:09,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:44:09,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:44:09,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:44:10,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1787 backedges. 259 proven. 7 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2021-11-21 00:44:10,017 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:44:10,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675633419] [2021-11-21 00:44:10,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675633419] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:44:10,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571384974] [2021-11-21 00:44:10,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:44:10,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:44:10,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:44:10,020 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:44:10,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 00:44:10,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:44:10,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:44:10,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:44:10,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1787 backedges. 259 proven. 7 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2021-11-21 00:44:10,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:44:10,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1787 backedges. 259 proven. 7 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2021-11-21 00:44:10,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571384974] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:44:10,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1291943270] [2021-11-21 00:44:10,484 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 00:44:10,484 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:44:10,485 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:44:10,485 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:44:10,485 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:44:10,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:10,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-21 00:44:10,781 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 10 treesize of output 9 [2021-11-21 00:44:11,336 INFO L354 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2021-11-21 00:44:11,336 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 202 treesize of output 208 [2021-11-21 00:44:11,734 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 15 treesize of output 14 [2021-11-21 00:44:11,938 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 11 treesize of output 7 [2021-11-21 00:44:12,590 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 15 treesize of output 14 [2021-11-21 00:44:12,804 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 15 treesize of output 14 [2021-11-21 00:44:13,108 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 00:44:13,379 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 15 treesize of output 14 [2021-11-21 00:44:13,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:13,788 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 104 treesize of output 106 [2021-11-21 00:44:14,030 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 15 treesize of output 14 [2021-11-21 00:44:14,258 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 00:44:14,487 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 15 treesize of output 14 [2021-11-21 00:44:14,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:14,911 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 104 treesize of output 106 [2021-11-21 00:44:15,217 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 15 treesize of output 14 [2021-11-21 00:44:15,546 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:44:15,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1291943270] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:44:15,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:44:15,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4, 4] total 11 [2021-11-21 00:44:15,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618779103] [2021-11-21 00:44:15,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:44:15,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:44:15,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:44:15,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:44:15,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:44:15,781 INFO L87 Difference]: Start difference. First operand 406 states and 502 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 00:44:15,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:44:15,822 INFO L93 Difference]: Finished difference Result 405 states and 412 transitions. [2021-11-21 00:44:15,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:44:15,822 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 109 [2021-11-21 00:44:15,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:44:15,825 INFO L225 Difference]: With dead ends: 405 [2021-11-21 00:44:15,825 INFO L226 Difference]: Without dead ends: 405 [2021-11-21 00:44:15,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 318 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:44:15,826 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:44:15,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:44:15,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-11-21 00:44:15,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 405. [2021-11-21 00:44:15,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 403 states have (on average 1.022332506203474) internal successors, (412), 404 states have internal predecessors, (412), 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 00:44:15,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 412 transitions. [2021-11-21 00:44:15,836 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 412 transitions. Word has length 109 [2021-11-21 00:44:15,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:44:15,837 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 412 transitions. [2021-11-21 00:44:15,837 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 00:44:15,837 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 412 transitions. [2021-11-21 00:44:15,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-21 00:44:15,839 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:44:15,839 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 64, 2, 2, 1, 1, 1] [2021-11-21 00:44:15,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-21 00:44:16,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-21 00:44:16,054 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-21 00:44:16,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:44:16,055 INFO L85 PathProgramCache]: Analyzing trace with hash 890597571, now seen corresponding path program 1 times [2021-11-21 00:44:16,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:44:16,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221009313] [2021-11-21 00:44:16,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:44:16,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:44:16,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:44:16,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6179 backedges. 0 proven. 3139 refuted. 0 times theorem prover too weak. 3040 trivial. 0 not checked. [2021-11-21 00:44:16,308 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:44:16,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221009313] [2021-11-21 00:44:16,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221009313] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:44:16,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807000354] [2021-11-21 00:44:16,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:44:16,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:44:16,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:44:16,310 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:44:16,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-21 00:44:16,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:44:16,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 726 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 00:44:16,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:44:16,462 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 10 treesize of output 8 [2021-11-21 00:44:16,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-21 00:44:18,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6179 backedges. 0 proven. 3139 refuted. 0 times theorem prover too weak. 3040 trivial. 0 not checked. [2021-11-21 00:44:18,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:44:20,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6179 backedges. 0 proven. 3139 refuted. 0 times theorem prover too weak. 3040 trivial. 0 not checked. [2021-11-21 00:44:20,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807000354] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:44:20,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1838544617] [2021-11-21 00:44:20,069 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 00:44:20,070 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:44:20,070 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:44:20,070 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:44:20,071 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:44:20,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:20,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-21 00:44:20,414 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 15 treesize of output 14 [2021-11-21 00:44:21,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:21,029 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 171 treesize of output 173 [2021-11-21 00:44:21,407 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 15 treesize of output 14 [2021-11-21 00:44:21,639 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 00:44:22,124 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 10 treesize of output 9 [2021-11-21 00:44:22,492 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 15 treesize of output 14 [2021-11-21 00:44:22,693 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 00:44:22,918 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 15 treesize of output 14 [2021-11-21 00:44:23,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:23,259 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 99 treesize of output 101 [2021-11-21 00:44:23,572 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 15 treesize of output 14 [2021-11-21 00:44:23,789 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 00:44:24,018 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 15 treesize of output 14 [2021-11-21 00:44:24,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:24,407 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 99 treesize of output 101 [2021-11-21 00:44:24,713 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 15 treesize of output 14 [2021-11-21 00:44:25,101 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:44:25,347 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:44:25,347 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:44:25,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 8 [2021-11-21 00:44:25,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842384933] [2021-11-21 00:44:25,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:44:25,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 00:44:25,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:44:25,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 00:44:25,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-11-21 00:44:25,349 INFO L87 Difference]: Start difference. First operand 405 states and 412 transitions. Second operand has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 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 00:44:25,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:44:25,408 INFO L93 Difference]: Finished difference Result 405 states and 410 transitions. [2021-11-21 00:44:25,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:44:25,409 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 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 199 [2021-11-21 00:44:25,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:44:25,411 INFO L225 Difference]: With dead ends: 405 [2021-11-21 00:44:25,411 INFO L226 Difference]: Without dead ends: 405 [2021-11-21 00:44:25,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 585 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-11-21 00:44:25,412 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 5 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:44:25,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 24 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 15 Unchecked, 0.0s Time] [2021-11-21 00:44:25,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-11-21 00:44:25,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 405. [2021-11-21 00:44:25,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 403 states have (on average 1.0173697270471465) internal successors, (410), 404 states have internal predecessors, (410), 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 00:44:25,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 410 transitions. [2021-11-21 00:44:25,422 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 410 transitions. Word has length 199 [2021-11-21 00:44:25,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:44:25,423 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 410 transitions. [2021-11-21 00:44:25,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 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 00:44:25,423 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 410 transitions. [2021-11-21 00:44:25,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2021-11-21 00:44:25,430 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:44:25,430 INFO L514 BasicCegarLoop]: trace histogram [128, 128, 128, 4, 4, 3, 1, 1] [2021-11-21 00:44:25,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-21 00:44:25,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-21 00:44:25,647 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-21 00:44:25,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:44:25,647 INFO L85 PathProgramCache]: Analyzing trace with hash 824738115, now seen corresponding path program 2 times [2021-11-21 00:44:25,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:44:25,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400333677] [2021-11-21 00:44:25,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:44:25,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:44:25,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:44:26,163 INFO L134 CoverageAnalysis]: Checked inductivity of 24914 backedges. 0 proven. 18834 refuted. 0 times theorem prover too weak. 6080 trivial. 0 not checked. [2021-11-21 00:44:26,164 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:44:26,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400333677] [2021-11-21 00:44:26,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400333677] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:44:26,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670543079] [2021-11-21 00:44:26,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:44:26,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:44:26,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:44:26,166 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:44:26,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-21 00:44:26,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 00:44:26,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:44:26,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-21 00:44:26,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:44:26,287 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 10 treesize of output 8 [2021-11-21 00:44:26,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-21 00:44:30,277 INFO L134 CoverageAnalysis]: Checked inductivity of 24914 backedges. 3 proven. 9414 refuted. 0 times theorem prover too weak. 15497 trivial. 0 not checked. [2021-11-21 00:44:30,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:44:33,464 INFO L134 CoverageAnalysis]: Checked inductivity of 24914 backedges. 0 proven. 9417 refuted. 0 times theorem prover too weak. 15497 trivial. 0 not checked. [2021-11-21 00:44:33,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670543079] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:44:33,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [489777595] [2021-11-21 00:44:33,467 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 00:44:33,467 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:44:33,467 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:44:33,468 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:44:33,468 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:44:33,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:33,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-21 00:44:33,812 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 15 treesize of output 14 [2021-11-21 00:44:34,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:34,368 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 171 treesize of output 173 [2021-11-21 00:44:34,752 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 15 treesize of output 14 [2021-11-21 00:44:35,001 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 00:44:35,554 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 15 treesize of output 14 [2021-11-21 00:44:35,874 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 15 treesize of output 14 [2021-11-21 00:44:36,126 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 00:44:36,326 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 15 treesize of output 14 [2021-11-21 00:44:36,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:36,758 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 99 treesize of output 101 [2021-11-21 00:44:37,052 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 15 treesize of output 14 [2021-11-21 00:44:37,226 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 00:44:37,549 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 10 treesize of output 9 [2021-11-21 00:44:37,928 INFO L354 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2021-11-21 00:44:37,929 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 89 treesize of output 95 [2021-11-21 00:44:38,227 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 15 treesize of output 14 [2021-11-21 00:44:38,621 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:44:38,986 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:44:38,986 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:44:38,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 11 [2021-11-21 00:44:38,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096233331] [2021-11-21 00:44:38,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:44:38,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-21 00:44:38,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:44:38,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-21 00:44:38,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-11-21 00:44:38,989 INFO L87 Difference]: Start difference. First operand 405 states and 410 transitions. Second operand has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 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 00:44:39,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:44:39,264 INFO L93 Difference]: Finished difference Result 512 states and 518 transitions. [2021-11-21 00:44:39,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 00:44:39,264 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 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 397 [2021-11-21 00:44:39,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:44:39,265 INFO L225 Difference]: With dead ends: 512 [2021-11-21 00:44:39,266 INFO L226 Difference]: Without dead ends: 0 [2021-11-21 00:44:39,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1203 GetRequests, 1178 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-11-21 00:44:39,266 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 96 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:44:39,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 36 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 130 Invalid, 0 Unknown, 18 Unchecked, 0.1s Time] [2021-11-21 00:44:39,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-21 00:44:39,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-21 00:44:39,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 00:44:39,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-21 00:44:39,267 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 397 [2021-11-21 00:44:39,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:44:39,267 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-21 00:44:39,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 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 00:44:39,268 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-21 00:44:39,268 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-21 00:44:39,270 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX (7 of 8 remaining) [2021-11-21 00:44:39,270 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION (6 of 8 remaining) [2021-11-21 00:44:39,271 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATION (5 of 8 remaining) [2021-11-21 00:44:39,271 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION (4 of 8 remaining) [2021-11-21 00:44:39,271 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATION (3 of 8 remaining) [2021-11-21 00:44:39,271 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION (2 of 8 remaining) [2021-11-21 00:44:39,271 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATION (1 of 8 remaining) [2021-11-21 00:44:39,271 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2021-11-21 00:44:39,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-21 00:44:39,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:44:39,481 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:44:39,482 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-21 00:44:39,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 12:44:39 BoogieIcfgContainer [2021-11-21 00:44:39,493 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-21 00:44:39,493 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-21 00:44:39,493 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-21 00:44:39,493 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-21 00:44:39,494 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:43:18" (3/4) ... [2021-11-21 00:44:39,497 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-21 00:44:39,512 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2021-11-21 00:44:39,512 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-11-21 00:44:39,512 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-21 00:44:39,513 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-21 00:44:39,558 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/bin/utaipan-TEXQjIfE4P/witness.graphml [2021-11-21 00:44:39,558 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-21 00:44:39,559 INFO L158 Benchmark]: Toolchain (without parser) took 81959.72ms. Allocated memory was 100.7MB in the beginning and 211.8MB in the end (delta: 111.1MB). Free memory was 60.6MB in the beginning and 71.7MB in the end (delta: -11.1MB). Peak memory consumption was 100.8MB. Max. memory is 16.1GB. [2021-11-21 00:44:39,559 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 100.7MB. Free memory is still 77.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:44:39,564 INFO L158 Benchmark]: CACSL2BoogieTranslator took 245.45ms. Allocated memory is still 100.7MB. Free memory was 60.4MB in the beginning and 75.7MB in the end (delta: -15.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-21 00:44:39,565 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.41ms. Allocated memory is still 100.7MB. Free memory was 75.7MB in the beginning and 74.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 00:44:39,565 INFO L158 Benchmark]: Boogie Preprocessor took 49.10ms. Allocated memory is still 100.7MB. Free memory was 74.1MB in the beginning and 73.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:44:39,566 INFO L158 Benchmark]: RCFGBuilder took 438.34ms. Allocated memory is still 100.7MB. Free memory was 72.8MB in the beginning and 60.5MB in the end (delta: 12.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-21 00:44:39,566 INFO L158 Benchmark]: TraceAbstraction took 81113.99ms. Allocated memory was 100.7MB in the beginning and 211.8MB in the end (delta: 111.1MB). Free memory was 60.2MB in the beginning and 74.5MB in the end (delta: -14.3MB). Peak memory consumption was 98.9MB. Max. memory is 16.1GB. [2021-11-21 00:44:39,566 INFO L158 Benchmark]: Witness Printer took 64.98ms. Allocated memory is still 211.8MB. Free memory was 74.5MB in the beginning and 71.7MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 00:44:39,570 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 100.7MB. Free memory is still 77.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 245.45ms. Allocated memory is still 100.7MB. Free memory was 60.4MB in the beginning and 75.7MB in the end (delta: -15.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.41ms. Allocated memory is still 100.7MB. Free memory was 75.7MB in the beginning and 74.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 49.10ms. Allocated memory is still 100.7MB. Free memory was 74.1MB in the beginning and 73.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 438.34ms. Allocated memory is still 100.7MB. Free memory was 72.8MB in the beginning and 60.5MB in the end (delta: 12.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 81113.99ms. Allocated memory was 100.7MB in the beginning and 211.8MB in the end (delta: 111.1MB). Free memory was 60.2MB in the beginning and 74.5MB in the end (delta: -14.3MB). Peak memory consumption was 98.9MB. Max. memory is 16.1GB. * Witness Printer took 64.98ms. Allocated memory is still 211.8MB. Free memory was 74.5MB in the beginning and 71.7MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. 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 - PositiveResult [Line: 16]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 81.1s, OverallIterations: 19, TraceHistogramMax: 128, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 796 SdHoareTripleChecker+Valid, 1.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 796 mSDsluCounter, 321 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 55 IncrementalHoareTripleChecker+Unchecked, 367 mSDsCounter, 406 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1229 IncrementalHoareTripleChecker+Invalid, 1690 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 406 mSolverCounterUnsat, 111 mSDtfsCounter, 1229 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3394 GetRequests, 3012 SyntacticMatches, 6 SemanticMatches, 376 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4085 ImplicationChecksByTransitivity, 9.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=406occurred in iteration=16, InterpolantAutomatonStates: 176, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 19 MinimizatonAttempts, 106 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 21.6s InterpolantComputationTime, 2407 NumberOfCodeBlocks, 1771 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 3383 ConstructedInterpolants, 297 QuantifiedInterpolants, 56664 SizeOfPredicates, 35 NumberOfNonLiveVariables, 2368 ConjunctsInSsa, 177 ConjunctsInUnsatCore, 42 InterpolantComputations, 9 PerfectInterpolantSequences, 57791/111595 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: OVERALL_TIME: 7.5s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 8, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 62, TOOLS_POST_TIME: 7.3s, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 62, TOOLS_QUANTIFIERELIM_TIME: 7.2s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.5s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 117, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 0, DOMAIN_JOIN_TIME: 0.0s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 11, DOMAIN_WIDEN_TIME: 0.2s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 17, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 8, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 6, LOOP_SUMMARIZER_CACHE_MISSES: 6, LOOP_SUMMARIZER_OVERALL_TIME: 6.6s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 6.6s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 17, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 86, DAG_COMPRESSION_RETAINED_NODES: 48, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-11-21 00:44:39,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40817e16-4fa4-436f-99ca-5fa568eed998/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: TRUE