./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ntdrivers-simplified/diskperf_simpl1.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26147c09-4ce7-461e-9233-d1adf6188fa2/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26147c09-4ce7-461e-9233-d1adf6188fa2/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26147c09-4ce7-461e-9233-d1adf6188fa2/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26147c09-4ce7-461e-9233-d1adf6188fa2/bin/utaipan-EQgc7hIp5V/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ntdrivers-simplified/diskperf_simpl1.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26147c09-4ce7-461e-9233-d1adf6188fa2/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26147c09-4ce7-461e-9233-d1adf6188fa2/bin/utaipan-EQgc7hIp5V --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 48b194ce99c1fa112b5c4d4ed6cc0216b9fbb33f6f6efd57d62e9c27b1f7eb5c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:35:12,556 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:35:12,557 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:35:12,590 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:35:12,591 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:35:12,592 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:35:12,594 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:35:12,597 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:35:12,599 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:35:12,600 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:35:12,601 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:35:12,603 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:35:12,604 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:35:12,606 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:35:12,610 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:35:12,612 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:35:12,614 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:35:12,621 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:35:12,623 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:35:12,627 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:35:12,630 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:35:12,633 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:35:12,634 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:35:12,637 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:35:12,642 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:35:12,647 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:35:12,648 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:35:12,649 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:35:12,650 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:35:12,652 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:35:12,653 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:35:12,654 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:35:12,656 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:35:12,657 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:35:12,659 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:35:12,659 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:35:12,660 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:35:12,660 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:35:12,660 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:35:12,661 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:35:12,662 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:35:12,663 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26147c09-4ce7-461e-9233-d1adf6188fa2/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-23 03:35:12,711 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:35:12,712 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:35:12,712 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:35:12,713 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:35:12,713 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:35:12,714 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:35:12,714 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:35:12,714 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:35:12,714 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:35:12,715 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:35:12,716 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:35:12,716 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:35:12,716 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:35:12,716 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:35:12,717 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:35:12,717 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:35:12,717 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:35:12,717 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:35:12,718 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 03:35:12,719 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 03:35:12,719 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:35:12,719 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:35:12,719 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 03:35:12,721 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:35:12,721 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:35:12,721 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:35:12,721 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 03:35:12,722 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 03:35:12,722 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 03:35:12,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:35:12,722 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 03:35:12,723 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:35:12,723 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:35:12,723 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:35:12,723 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:35:12,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:35:12,724 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:35:12,724 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:35:12,724 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:35:12,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:35:12,725 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:35:12,725 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:35:12,725 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_26147c09-4ce7-461e-9233-d1adf6188fa2/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26147c09-4ce7-461e-9233-d1adf6188fa2/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 48b194ce99c1fa112b5c4d4ed6cc0216b9fbb33f6f6efd57d62e9c27b1f7eb5c [2021-11-23 03:35:13,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:35:13,031 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:35:13,034 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:35:13,035 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:35:13,036 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:35:13,038 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26147c09-4ce7-461e-9233-d1adf6188fa2/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ntdrivers-simplified/diskperf_simpl1.cil.c [2021-11-23 03:35:13,111 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26147c09-4ce7-461e-9233-d1adf6188fa2/bin/utaipan-EQgc7hIp5V/data/c2744c6a9/2b1834e5d5ad48d0af6d6a9514b010c8/FLAG1b43e70a7 [2021-11-23 03:35:13,739 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:35:13,742 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26147c09-4ce7-461e-9233-d1adf6188fa2/sv-benchmarks/c/ntdrivers-simplified/diskperf_simpl1.cil.c [2021-11-23 03:35:13,768 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26147c09-4ce7-461e-9233-d1adf6188fa2/bin/utaipan-EQgc7hIp5V/data/c2744c6a9/2b1834e5d5ad48d0af6d6a9514b010c8/FLAG1b43e70a7 [2021-11-23 03:35:14,024 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26147c09-4ce7-461e-9233-d1adf6188fa2/bin/utaipan-EQgc7hIp5V/data/c2744c6a9/2b1834e5d5ad48d0af6d6a9514b010c8 [2021-11-23 03:35:14,026 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:35:14,028 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:35:14,044 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:35:14,044 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:35:14,046 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:35:14,047 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:35:14" (1/1) ... [2021-11-23 03:35:14,048 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76008004 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:35:14, skipping insertion in model container [2021-11-23 03:35:14,049 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:35:14" (1/1) ... [2021-11-23 03:35:14,056 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:35:14,104 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:35:14,358 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26147c09-4ce7-461e-9233-d1adf6188fa2/sv-benchmarks/c/ntdrivers-simplified/diskperf_simpl1.cil.c[2072,2085] [2021-11-23 03:35:14,503 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:35:14,512 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:35:14,534 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26147c09-4ce7-461e-9233-d1adf6188fa2/sv-benchmarks/c/ntdrivers-simplified/diskperf_simpl1.cil.c[2072,2085] [2021-11-23 03:35:14,613 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:35:14,629 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:35:14,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:35:14 WrapperNode [2021-11-23 03:35:14,630 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:35:14,631 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:35:14,631 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:35:14,631 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:35:14,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:35:14" (1/1) ... [2021-11-23 03:35:14,665 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:35:14" (1/1) ... [2021-11-23 03:35:14,755 INFO L137 Inliner]: procedures = 38, calls = 66, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 755 [2021-11-23 03:35:14,755 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:35:14,756 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:35:14,756 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:35:14,756 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:35:14,779 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:35:14" (1/1) ... [2021-11-23 03:35:14,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:35:14" (1/1) ... [2021-11-23 03:35:14,786 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:35:14" (1/1) ... [2021-11-23 03:35:14,786 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:35:14" (1/1) ... [2021-11-23 03:35:14,815 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:35:14" (1/1) ... [2021-11-23 03:35:14,836 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:35:14" (1/1) ... [2021-11-23 03:35:14,840 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:35:14" (1/1) ... [2021-11-23 03:35:14,862 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:35:14,863 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:35:14,863 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:35:14,863 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:35:14,864 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:35:14" (1/1) ... [2021-11-23 03:35:14,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:35:14,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26147c09-4ce7-461e-9233-d1adf6188fa2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:35:14,912 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26147c09-4ce7-461e-9233-d1adf6188fa2/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:35:14,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26147c09-4ce7-461e-9233-d1adf6188fa2/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:35:14,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:35:14,957 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2021-11-23 03:35:14,958 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2021-11-23 03:35:14,958 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2021-11-23 03:35:14,958 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2021-11-23 03:35:14,958 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2021-11-23 03:35:14,958 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2021-11-23 03:35:14,958 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildDeviceIoControlRequest [2021-11-23 03:35:14,959 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildDeviceIoControlRequest [2021-11-23 03:35:14,959 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfForwardIrpSynchronous [2021-11-23 03:35:14,959 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfForwardIrpSynchronous [2021-11-23 03:35:14,959 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2021-11-23 03:35:14,959 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2021-11-23 03:35:14,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:35:14,960 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2021-11-23 03:35:14,960 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2021-11-23 03:35:14,960 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfIrpCompletion [2021-11-23 03:35:14,960 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfIrpCompletion [2021-11-23 03:35:14,960 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfIoCompletion [2021-11-23 03:35:14,960 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfIoCompletion [2021-11-23 03:35:14,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:35:14,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:35:15,125 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:35:15,132 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:35:15,149 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 03:35:15,274 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2021-11-23 03:35:15,275 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2021-11-23 03:35:15,277 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 03:35:15,304 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2021-11-23 03:35:15,305 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2021-11-23 03:35:15,388 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 03:35:15,395 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 03:35:15,409 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 03:35:15,901 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##39: assume !false; [2021-11-23 03:35:15,901 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume false; [2021-11-23 03:35:15,902 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume false; [2021-11-23 03:35:15,902 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume !false; [2021-11-23 03:35:15,902 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##106: assume !false; [2021-11-23 03:35:15,902 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##105: assume false; [2021-11-23 03:35:15,904 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 03:35:15,927 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !false; [2021-11-23 03:35:15,928 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume false; [2021-11-23 03:35:15,971 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:35:16,109 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:35:16,109 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 03:35:16,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:35:16 BoogieIcfgContainer [2021-11-23 03:35:16,113 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:35:16,117 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:35:16,117 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:35:16,120 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:35:16,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:35:14" (1/3) ... [2021-11-23 03:35:16,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ae040af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:35:16, skipping insertion in model container [2021-11-23 03:35:16,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:35:14" (2/3) ... [2021-11-23 03:35:16,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ae040af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:35:16, skipping insertion in model container [2021-11-23 03:35:16,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:35:16" (3/3) ... [2021-11-23 03:35:16,124 INFO L111 eAbstractionObserver]: Analyzing ICFG diskperf_simpl1.cil.c [2021-11-23 03:35:16,129 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:35:16,129 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 03:35:16,192 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:35:16,201 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 [2021-11-23 03:35:16,201 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 03:35:16,228 INFO L276 IsEmpty]: Start isEmpty. Operand has 190 states, 134 states have (on average 1.537313432835821) internal successors, (206), 152 states have internal predecessors, (206), 44 states have call successors, (44), 9 states have call predecessors, (44), 9 states have return successors, (44), 40 states have call predecessors, (44), 44 states have call successors, (44) [2021-11-23 03:35:16,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-23 03:35:16,244 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:16,245 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-23 03:35:16,245 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:16,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:16,251 INFO L85 PathProgramCache]: Analyzing trace with hash 25459806, now seen corresponding path program 1 times [2021-11-23 03:35:16,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:16,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886654630] [2021-11-23 03:35:16,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:16,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:16,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:16,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:35:16,417 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:16,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886654630] [2021-11-23 03:35:16,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886654630] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:16,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:16,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:35:16,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517841393] [2021-11-23 03:35:16,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:16,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:35:16,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:16,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:35:16,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:35:16,458 INFO L87 Difference]: Start difference. First operand has 190 states, 134 states have (on average 1.537313432835821) internal successors, (206), 152 states have internal predecessors, (206), 44 states have call successors, (44), 9 states have call predecessors, (44), 9 states have return successors, (44), 40 states have call predecessors, (44), 44 states have call successors, (44) 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) [2021-11-23 03:35:16,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:16,684 INFO L93 Difference]: Finished difference Result 211 states and 311 transitions. [2021-11-23 03:35:16,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:35:16,687 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 [2021-11-23 03:35:16,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:16,707 INFO L225 Difference]: With dead ends: 211 [2021-11-23 03:35:16,707 INFO L226 Difference]: Without dead ends: 209 [2021-11-23 03:35:16,709 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 [2021-11-23 03:35:16,717 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 134 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:16,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 391 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:35:16,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-11-23 03:35:16,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 195. [2021-11-23 03:35:16,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 141 states have (on average 1.5177304964539007) internal successors, (214), 157 states have internal predecessors, (214), 44 states have call successors, (44), 9 states have call predecessors, (44), 8 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-23 03:35:16,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 288 transitions. [2021-11-23 03:35:16,819 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 288 transitions. Word has length 4 [2021-11-23 03:35:16,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:16,819 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 288 transitions. [2021-11-23 03:35:16,819 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) [2021-11-23 03:35:16,821 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 288 transitions. [2021-11-23 03:35:16,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 03:35:16,821 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:16,822 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 03:35:16,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:35:16,822 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:16,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:16,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1616214689, now seen corresponding path program 1 times [2021-11-23 03:35:16,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:16,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094530770] [2021-11-23 03:35:16,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:16,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:16,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:16,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:35:16,864 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:16,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094530770] [2021-11-23 03:35:16,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094530770] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:16,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:16,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:35:16,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894768630] [2021-11-23 03:35:16,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:16,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:35:16,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:16,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:35:16,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:35:16,867 INFO L87 Difference]: Start difference. First operand 195 states and 288 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:35:16,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:16,998 INFO L93 Difference]: Finished difference Result 329 states and 481 transitions. [2021-11-23 03:35:16,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:35:16,998 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 03:35:16,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:17,003 INFO L225 Difference]: With dead ends: 329 [2021-11-23 03:35:17,003 INFO L226 Difference]: Without dead ends: 329 [2021-11-23 03:35:17,004 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 [2021-11-23 03:35:17,005 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 260 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:17,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 444 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:35:17,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-11-23 03:35:17,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 313. [2021-11-23 03:35:17,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 232 states have (on average 1.4655172413793103) internal successors, (340), 244 states have internal predecessors, (340), 63 states have call successors, (63), 16 states have call predecessors, (63), 16 states have return successors, (61), 56 states have call predecessors, (61), 49 states have call successors, (61) [2021-11-23 03:35:17,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 464 transitions. [2021-11-23 03:35:17,043 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 464 transitions. Word has length 6 [2021-11-23 03:35:17,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:17,044 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 464 transitions. [2021-11-23 03:35:17,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:35:17,044 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 464 transitions. [2021-11-23 03:35:17,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 03:35:17,045 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:17,045 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:17,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:35:17,046 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:17,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:17,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1553979174, now seen corresponding path program 1 times [2021-11-23 03:35:17,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:17,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768309363] [2021-11-23 03:35:17,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:17,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:17,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:17,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:35:17,150 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:17,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768309363] [2021-11-23 03:35:17,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768309363] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:17,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:17,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:35:17,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649951580] [2021-11-23 03:35:17,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:17,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:35:17,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:17,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:35:17,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:35:17,155 INFO L87 Difference]: Start difference. First operand 313 states and 464 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:35:17,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:17,501 INFO L93 Difference]: Finished difference Result 448 states and 662 transitions. [2021-11-23 03:35:17,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:35:17,502 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 03:35:17,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:17,510 INFO L225 Difference]: With dead ends: 448 [2021-11-23 03:35:17,511 INFO L226 Difference]: Without dead ends: 448 [2021-11-23 03:35:17,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:35:17,518 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 420 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:17,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 378 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:35:17,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-11-23 03:35:17,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 442. [2021-11-23 03:35:17,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 328 states have (on average 1.420731707317073) internal successors, (466), 335 states have internal predecessors, (466), 86 states have call successors, (86), 28 states have call predecessors, (86), 26 states have return successors, (106), 82 states have call predecessors, (106), 75 states have call successors, (106) [2021-11-23 03:35:17,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 658 transitions. [2021-11-23 03:35:17,587 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 658 transitions. Word has length 9 [2021-11-23 03:35:17,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:17,587 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 658 transitions. [2021-11-23 03:35:17,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:35:17,588 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 658 transitions. [2021-11-23 03:35:17,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 03:35:17,589 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:17,589 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:17,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:35:17,589 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:17,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:17,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1444845384, now seen corresponding path program 1 times [2021-11-23 03:35:17,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:17,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662492285] [2021-11-23 03:35:17,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:17,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:17,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:17,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:35:17,651 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:17,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662492285] [2021-11-23 03:35:17,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662492285] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:17,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:17,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-23 03:35:17,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156695899] [2021-11-23 03:35:17,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:17,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:35:17,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:17,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:35:17,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:35:17,655 INFO L87 Difference]: Start difference. First operand 442 states and 658 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2021-11-23 03:35:17,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:17,767 INFO L93 Difference]: Finished difference Result 441 states and 657 transitions. [2021-11-23 03:35:17,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:35:17,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 03:35:17,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:17,772 INFO L225 Difference]: With dead ends: 441 [2021-11-23 03:35:17,772 INFO L226 Difference]: Without dead ends: 439 [2021-11-23 03:35:17,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:35:17,774 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 135 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:17,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 303 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:35:17,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-11-23 03:35:17,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 434. [2021-11-23 03:35:17,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 321 states have (on average 1.395638629283489) internal successors, (448), 327 states have internal predecessors, (448), 86 states have call successors, (86), 28 states have call predecessors, (86), 26 states have return successors, (106), 82 states have call predecessors, (106), 75 states have call successors, (106) [2021-11-23 03:35:17,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 640 transitions. [2021-11-23 03:35:17,800 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 640 transitions. Word has length 7 [2021-11-23 03:35:17,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:17,800 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 640 transitions. [2021-11-23 03:35:17,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2021-11-23 03:35:17,801 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 640 transitions. [2021-11-23 03:35:17,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 03:35:17,802 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:17,802 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:17,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 03:35:17,803 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:17,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:17,804 INFO L85 PathProgramCache]: Analyzing trace with hash 190657969, now seen corresponding path program 1 times [2021-11-23 03:35:17,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:17,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117224683] [2021-11-23 03:35:17,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:17,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:17,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:17,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:35:17,831 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:17,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117224683] [2021-11-23 03:35:17,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117224683] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:17,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:17,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:35:17,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039785560] [2021-11-23 03:35:17,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:17,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:35:17,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:17,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:35:17,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:35:17,834 INFO L87 Difference]: Start difference. First operand 434 states and 640 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:35:17,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:17,929 INFO L93 Difference]: Finished difference Result 437 states and 642 transitions. [2021-11-23 03:35:17,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:35:17,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 03:35:17,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:17,936 INFO L225 Difference]: With dead ends: 437 [2021-11-23 03:35:17,936 INFO L226 Difference]: Without dead ends: 434 [2021-11-23 03:35:17,937 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 [2021-11-23 03:35:17,940 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 0 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:17,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 425 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:35:17,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-11-23 03:35:17,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2021-11-23 03:35:17,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 321 states have (on average 1.3925233644859814) internal successors, (447), 327 states have internal predecessors, (447), 86 states have call successors, (86), 28 states have call predecessors, (86), 26 states have return successors, (106), 82 states have call predecessors, (106), 75 states have call successors, (106) [2021-11-23 03:35:17,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 639 transitions. [2021-11-23 03:35:17,968 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 639 transitions. Word has length 11 [2021-11-23 03:35:17,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:17,969 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 639 transitions. [2021-11-23 03:35:17,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:35:17,969 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 639 transitions. [2021-11-23 03:35:17,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 03:35:17,975 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:17,975 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:17,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 03:35:17,976 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:17,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:17,977 INFO L85 PathProgramCache]: Analyzing trace with hash 209179452, now seen corresponding path program 1 times [2021-11-23 03:35:17,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:17,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978600872] [2021-11-23 03:35:17,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:17,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:18,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:18,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:35:18,076 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:18,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978600872] [2021-11-23 03:35:18,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978600872] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:18,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:18,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:35:18,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913890774] [2021-11-23 03:35:18,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:18,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:35:18,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:18,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:35:18,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:35:18,079 INFO L87 Difference]: Start difference. First operand 434 states and 639 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:35:18,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:18,158 INFO L93 Difference]: Finished difference Result 672 states and 995 transitions. [2021-11-23 03:35:18,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:35:18,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-23 03:35:18,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:18,163 INFO L225 Difference]: With dead ends: 672 [2021-11-23 03:35:18,164 INFO L226 Difference]: Without dead ends: 672 [2021-11-23 03:35:18,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:35:18,167 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 203 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:18,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 421 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:35:18,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-11-23 03:35:18,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 632. [2021-11-23 03:35:18,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 467 states have (on average 1.3940042826552463) internal successors, (651), 472 states have internal predecessors, (651), 124 states have call successors, (124), 42 states have call predecessors, (124), 40 states have return successors, (171), 119 states have call predecessors, (171), 114 states have call successors, (171) [2021-11-23 03:35:18,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 946 transitions. [2021-11-23 03:35:18,217 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 946 transitions. Word has length 13 [2021-11-23 03:35:18,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:18,218 INFO L470 AbstractCegarLoop]: Abstraction has 632 states and 946 transitions. [2021-11-23 03:35:18,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:35:18,218 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 946 transitions. [2021-11-23 03:35:18,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 03:35:18,220 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:18,220 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:18,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 03:35:18,220 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:18,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:18,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1824710985, now seen corresponding path program 1 times [2021-11-23 03:35:18,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:18,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961480835] [2021-11-23 03:35:18,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:18,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:18,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:18,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:35:18,287 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:18,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961480835] [2021-11-23 03:35:18,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961480835] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:18,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:18,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:35:18,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608913584] [2021-11-23 03:35:18,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:18,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:35:18,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:18,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:35:18,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:35:18,290 INFO L87 Difference]: Start difference. First operand 632 states and 946 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:35:18,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:18,382 INFO L93 Difference]: Finished difference Result 637 states and 952 transitions. [2021-11-23 03:35:18,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:35:18,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-23 03:35:18,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:18,403 INFO L225 Difference]: With dead ends: 637 [2021-11-23 03:35:18,403 INFO L226 Difference]: Without dead ends: 637 [2021-11-23 03:35:18,404 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 [2021-11-23 03:35:18,405 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 7 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:18,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 375 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:35:18,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-11-23 03:35:18,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 637. [2021-11-23 03:35:18,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 473 states have (on average 1.3911205073995772) internal successors, (658), 476 states have internal predecessors, (658), 123 states have call successors, (123), 43 states have call predecessors, (123), 40 states have return successors, (171), 119 states have call predecessors, (171), 114 states have call successors, (171) [2021-11-23 03:35:18,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 952 transitions. [2021-11-23 03:35:18,444 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 952 transitions. Word has length 16 [2021-11-23 03:35:18,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:18,444 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 952 transitions. [2021-11-23 03:35:18,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:35:18,445 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 952 transitions. [2021-11-23 03:35:18,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 03:35:18,447 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:18,447 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:18,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 03:35:18,453 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:18,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:18,454 INFO L85 PathProgramCache]: Analyzing trace with hash 735565653, now seen corresponding path program 1 times [2021-11-23 03:35:18,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:18,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899649436] [2021-11-23 03:35:18,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:18,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:18,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:18,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:35:18,521 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:18,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899649436] [2021-11-23 03:35:18,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899649436] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:18,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:18,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:35:18,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077575124] [2021-11-23 03:35:18,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:18,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:35:18,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:18,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:35:18,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:35:18,524 INFO L87 Difference]: Start difference. First operand 637 states and 952 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:35:18,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:18,614 INFO L93 Difference]: Finished difference Result 651 states and 966 transitions. [2021-11-23 03:35:18,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:35:18,615 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-11-23 03:35:18,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:18,620 INFO L225 Difference]: With dead ends: 651 [2021-11-23 03:35:18,621 INFO L226 Difference]: Without dead ends: 651 [2021-11-23 03:35:18,621 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 [2021-11-23 03:35:18,622 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 26 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:18,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 361 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:35:18,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2021-11-23 03:35:18,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 649. [2021-11-23 03:35:18,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 485 states have (on average 1.3835051546391752) internal successors, (671), 488 states have internal predecessors, (671), 123 states have call successors, (123), 43 states have call predecessors, (123), 40 states have return successors, (171), 119 states have call predecessors, (171), 114 states have call successors, (171) [2021-11-23 03:35:18,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 965 transitions. [2021-11-23 03:35:18,656 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 965 transitions. Word has length 20 [2021-11-23 03:35:18,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:18,657 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 965 transitions. [2021-11-23 03:35:18,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:35:18,657 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 965 transitions. [2021-11-23 03:35:18,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 03:35:18,659 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:18,660 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:18,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 03:35:18,660 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:18,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:18,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1780778480, now seen corresponding path program 1 times [2021-11-23 03:35:18,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:18,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607353790] [2021-11-23 03:35:18,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:18,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:18,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:18,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:35:18,768 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:18,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607353790] [2021-11-23 03:35:18,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607353790] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:18,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:18,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:35:18,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7149367] [2021-11-23 03:35:18,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:18,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:35:18,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:18,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:35:18,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:35:18,771 INFO L87 Difference]: Start difference. First operand 649 states and 965 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:35:19,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:19,019 INFO L93 Difference]: Finished difference Result 651 states and 964 transitions. [2021-11-23 03:35:19,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:35:19,020 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-11-23 03:35:19,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:19,025 INFO L225 Difference]: With dead ends: 651 [2021-11-23 03:35:19,026 INFO L226 Difference]: Without dead ends: 651 [2021-11-23 03:35:19,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:35:19,029 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 290 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:19,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 404 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:35:19,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2021-11-23 03:35:19,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 649. [2021-11-23 03:35:19,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 485 states have (on average 1.379381443298969) internal successors, (669), 488 states have internal predecessors, (669), 123 states have call successors, (123), 43 states have call predecessors, (123), 40 states have return successors, (171), 119 states have call predecessors, (171), 114 states have call successors, (171) [2021-11-23 03:35:19,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 963 transitions. [2021-11-23 03:35:19,057 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 963 transitions. Word has length 21 [2021-11-23 03:35:19,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:19,057 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 963 transitions. [2021-11-23 03:35:19,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:35:19,058 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 963 transitions. [2021-11-23 03:35:19,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 03:35:19,059 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:19,059 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:19,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 03:35:19,059 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:19,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:19,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1519215839, now seen corresponding path program 1 times [2021-11-23 03:35:19,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:19,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119532727] [2021-11-23 03:35:19,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:19,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:19,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:19,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:35:19,115 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:19,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119532727] [2021-11-23 03:35:19,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119532727] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:19,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:19,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:35:19,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208387650] [2021-11-23 03:35:19,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:19,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:35:19,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:19,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:35:19,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:35:19,117 INFO L87 Difference]: Start difference. First operand 649 states and 963 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:35:19,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:19,380 INFO L93 Difference]: Finished difference Result 651 states and 962 transitions. [2021-11-23 03:35:19,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:35:19,381 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-11-23 03:35:19,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:19,385 INFO L225 Difference]: With dead ends: 651 [2021-11-23 03:35:19,386 INFO L226 Difference]: Without dead ends: 651 [2021-11-23 03:35:19,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:35:19,387 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 285 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:19,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 406 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:35:19,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2021-11-23 03:35:19,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 649. [2021-11-23 03:35:19,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 485 states have (on average 1.3752577319587629) internal successors, (667), 488 states have internal predecessors, (667), 123 states have call successors, (123), 43 states have call predecessors, (123), 40 states have return successors, (171), 119 states have call predecessors, (171), 114 states have call successors, (171) [2021-11-23 03:35:19,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 961 transitions. [2021-11-23 03:35:19,413 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 961 transitions. Word has length 22 [2021-11-23 03:35:19,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:19,413 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 961 transitions. [2021-11-23 03:35:19,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:35:19,414 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 961 transitions. [2021-11-23 03:35:19,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:35:19,415 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:19,415 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:19,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 03:35:19,415 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:19,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:19,416 INFO L85 PathProgramCache]: Analyzing trace with hash 204342713, now seen corresponding path program 1 times [2021-11-23 03:35:19,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:19,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438196426] [2021-11-23 03:35:19,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:19,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:19,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:19,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:35:19,444 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:19,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438196426] [2021-11-23 03:35:19,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438196426] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:19,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:19,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:35:19,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235236114] [2021-11-23 03:35:19,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:19,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:35:19,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:19,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:35:19,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:35:19,446 INFO L87 Difference]: Start difference. First operand 649 states and 961 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:35:19,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:19,508 INFO L93 Difference]: Finished difference Result 660 states and 971 transitions. [2021-11-23 03:35:19,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:35:19,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-11-23 03:35:19,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:19,513 INFO L225 Difference]: With dead ends: 660 [2021-11-23 03:35:19,514 INFO L226 Difference]: Without dead ends: 647 [2021-11-23 03:35:19,514 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 [2021-11-23 03:35:19,515 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 0 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:19,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 410 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:35:19,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-11-23 03:35:19,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 647. [2021-11-23 03:35:19,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 484 states have (on average 1.3739669421487604) internal successors, (665), 487 states have internal predecessors, (665), 122 states have call successors, (122), 43 states have call predecessors, (122), 40 states have return successors, (170), 118 states have call predecessors, (170), 113 states have call successors, (170) [2021-11-23 03:35:19,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 957 transitions. [2021-11-23 03:35:19,546 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 957 transitions. Word has length 23 [2021-11-23 03:35:19,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:19,546 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 957 transitions. [2021-11-23 03:35:19,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:35:19,547 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 957 transitions. [2021-11-23 03:35:19,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:35:19,548 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:19,548 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:19,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 03:35:19,548 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:19,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:19,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1261158427, now seen corresponding path program 1 times [2021-11-23 03:35:19,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:19,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381150317] [2021-11-23 03:35:19,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:19,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:19,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:19,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:35:19,594 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:19,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381150317] [2021-11-23 03:35:19,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381150317] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:19,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:19,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:35:19,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77978819] [2021-11-23 03:35:19,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:19,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:35:19,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:19,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:35:19,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:35:19,596 INFO L87 Difference]: Start difference. First operand 647 states and 957 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:35:19,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:19,790 INFO L93 Difference]: Finished difference Result 647 states and 955 transitions. [2021-11-23 03:35:19,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:35:19,791 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-23 03:35:19,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:19,795 INFO L225 Difference]: With dead ends: 647 [2021-11-23 03:35:19,796 INFO L226 Difference]: Without dead ends: 647 [2021-11-23 03:35:19,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:35:19,797 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 234 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:19,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 299 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:35:19,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-11-23 03:35:19,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 647. [2021-11-23 03:35:19,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 484 states have (on average 1.3698347107438016) internal successors, (663), 487 states have internal predecessors, (663), 122 states have call successors, (122), 43 states have call predecessors, (122), 40 states have return successors, (170), 118 states have call predecessors, (170), 113 states have call successors, (170) [2021-11-23 03:35:19,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 955 transitions. [2021-11-23 03:35:19,823 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 955 transitions. Word has length 23 [2021-11-23 03:35:19,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:19,823 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 955 transitions. [2021-11-23 03:35:19,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:35:19,823 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 955 transitions. [2021-11-23 03:35:19,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 03:35:19,824 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:19,824 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:19,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 03:35:19,825 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:19,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:19,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1469075890, now seen corresponding path program 1 times [2021-11-23 03:35:19,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:19,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519843255] [2021-11-23 03:35:19,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:19,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:19,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:19,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:35:19,877 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:19,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519843255] [2021-11-23 03:35:19,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519843255] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:19,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:19,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:35:19,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974223299] [2021-11-23 03:35:19,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:19,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:35:19,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:19,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:35:19,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:35:19,879 INFO L87 Difference]: Start difference. First operand 647 states and 955 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:35:20,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:20,063 INFO L93 Difference]: Finished difference Result 647 states and 953 transitions. [2021-11-23 03:35:20,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:35:20,064 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-23 03:35:20,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:20,068 INFO L225 Difference]: With dead ends: 647 [2021-11-23 03:35:20,068 INFO L226 Difference]: Without dead ends: 647 [2021-11-23 03:35:20,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:35:20,069 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 233 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:20,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 307 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:35:20,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-11-23 03:35:20,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 647. [2021-11-23 03:35:20,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 484 states have (on average 1.365702479338843) internal successors, (661), 487 states have internal predecessors, (661), 122 states have call successors, (122), 43 states have call predecessors, (122), 40 states have return successors, (170), 118 states have call predecessors, (170), 113 states have call successors, (170) [2021-11-23 03:35:20,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 953 transitions. [2021-11-23 03:35:20,094 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 953 transitions. Word has length 24 [2021-11-23 03:35:20,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:20,095 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 953 transitions. [2021-11-23 03:35:20,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:35:20,095 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 953 transitions. [2021-11-23 03:35:20,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:35:20,097 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:20,097 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:20,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 03:35:20,098 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:20,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:20,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1265499097, now seen corresponding path program 1 times [2021-11-23 03:35:20,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:20,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821417080] [2021-11-23 03:35:20,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:20,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:20,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:20,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:35:20,161 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:20,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821417080] [2021-11-23 03:35:20,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821417080] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:20,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:20,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:35:20,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921288781] [2021-11-23 03:35:20,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:20,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:35:20,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:20,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:35:20,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:35:20,163 INFO L87 Difference]: Start difference. First operand 647 states and 953 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:35:20,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:20,304 INFO L93 Difference]: Finished difference Result 965 states and 1519 transitions. [2021-11-23 03:35:20,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:35:20,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-11-23 03:35:20,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:20,312 INFO L225 Difference]: With dead ends: 965 [2021-11-23 03:35:20,312 INFO L226 Difference]: Without dead ends: 965 [2021-11-23 03:35:20,312 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 [2021-11-23 03:35:20,313 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 145 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:20,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 431 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:35:20,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2021-11-23 03:35:20,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 691. [2021-11-23 03:35:20,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 517 states have (on average 1.369439071566731) internal successors, (708), 522 states have internal predecessors, (708), 129 states have call successors, (129), 45 states have call predecessors, (129), 44 states have return successors, (196), 125 states have call predecessors, (196), 120 states have call successors, (196) [2021-11-23 03:35:20,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 1033 transitions. [2021-11-23 03:35:20,353 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 1033 transitions. Word has length 25 [2021-11-23 03:35:20,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:20,354 INFO L470 AbstractCegarLoop]: Abstraction has 691 states and 1033 transitions. [2021-11-23 03:35:20,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:35:20,354 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 1033 transitions. [2021-11-23 03:35:20,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 03:35:20,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:20,357 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:20,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 03:35:20,357 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:20,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:20,357 INFO L85 PathProgramCache]: Analyzing trace with hash 259071617, now seen corresponding path program 1 times [2021-11-23 03:35:20,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:20,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551050320] [2021-11-23 03:35:20,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:20,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:20,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:20,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:35:20,413 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:20,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551050320] [2021-11-23 03:35:20,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551050320] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:20,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:20,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:35:20,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459665116] [2021-11-23 03:35:20,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:20,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:35:20,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:20,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:35:20,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:35:20,415 INFO L87 Difference]: Start difference. First operand 691 states and 1033 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:35:20,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:20,572 INFO L93 Difference]: Finished difference Result 459 states and 632 transitions. [2021-11-23 03:35:20,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:35:20,572 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-11-23 03:35:20,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:20,575 INFO L225 Difference]: With dead ends: 459 [2021-11-23 03:35:20,576 INFO L226 Difference]: Without dead ends: 459 [2021-11-23 03:35:20,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:35:20,578 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 249 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:20,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 384 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:35:20,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-11-23 03:35:20,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 445. [2021-11-23 03:35:20,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 336 states have (on average 1.318452380952381) internal successors, (443), 342 states have internal predecessors, (443), 79 states have call successors, (79), 31 states have call predecessors, (79), 29 states have return successors, (97), 73 states have call predecessors, (97), 70 states have call successors, (97) [2021-11-23 03:35:20,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 619 transitions. [2021-11-23 03:35:20,595 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 619 transitions. Word has length 29 [2021-11-23 03:35:20,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:20,596 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 619 transitions. [2021-11-23 03:35:20,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:35:20,596 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 619 transitions. [2021-11-23 03:35:20,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:35:20,597 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:20,598 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:20,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 03:35:20,598 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:20,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:20,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1602242582, now seen corresponding path program 1 times [2021-11-23 03:35:20,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:20,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480128168] [2021-11-23 03:35:20,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:20,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:20,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:20,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:35:20,642 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:20,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480128168] [2021-11-23 03:35:20,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480128168] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:20,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:20,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:35:20,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039893140] [2021-11-23 03:35:20,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:20,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:35:20,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:20,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:35:20,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:35:20,647 INFO L87 Difference]: Start difference. First operand 445 states and 619 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:35:20,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:20,788 INFO L93 Difference]: Finished difference Result 635 states and 946 transitions. [2021-11-23 03:35:20,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:35:20,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-23 03:35:20,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:20,794 INFO L225 Difference]: With dead ends: 635 [2021-11-23 03:35:20,795 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 03:35:20,795 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 [2021-11-23 03:35:20,795 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 146 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:20,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 500 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:35:20,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 03:35:20,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 442. [2021-11-23 03:35:20,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 334 states have (on average 1.311377245508982) internal successors, (438), 339 states have internal predecessors, (438), 78 states have call successors, (78), 31 states have call predecessors, (78), 29 states have return successors, (97), 73 states have call predecessors, (97), 70 states have call successors, (97) [2021-11-23 03:35:20,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 613 transitions. [2021-11-23 03:35:20,819 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 613 transitions. Word has length 25 [2021-11-23 03:35:20,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:20,819 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 613 transitions. [2021-11-23 03:35:20,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:35:20,819 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 613 transitions. [2021-11-23 03:35:20,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 03:35:20,820 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:20,820 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:20,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 03:35:20,820 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:20,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:20,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1029122890, now seen corresponding path program 1 times [2021-11-23 03:35:20,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:20,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930120466] [2021-11-23 03:35:20,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:20,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:20,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:20,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:35:20,875 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:20,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930120466] [2021-11-23 03:35:20,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930120466] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:20,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:20,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 03:35:20,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411878877] [2021-11-23 03:35:20,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:20,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:35:20,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:20,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:35:20,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:35:20,877 INFO L87 Difference]: Start difference. First operand 442 states and 613 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:35:21,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:21,053 INFO L93 Difference]: Finished difference Result 454 states and 626 transitions. [2021-11-23 03:35:21,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:35:21,054 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-11-23 03:35:21,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:21,057 INFO L225 Difference]: With dead ends: 454 [2021-11-23 03:35:21,057 INFO L226 Difference]: Without dead ends: 453 [2021-11-23 03:35:21,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:35:21,058 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 18 mSDsluCounter, 1082 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1181 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:21,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 1181 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:35:21,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-11-23 03:35:21,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 449. [2021-11-23 03:35:21,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 341 states have (on average 1.3079178885630498) internal successors, (446), 346 states have internal predecessors, (446), 78 states have call successors, (78), 31 states have call predecessors, (78), 29 states have return successors, (97), 73 states have call predecessors, (97), 70 states have call successors, (97) [2021-11-23 03:35:21,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 621 transitions. [2021-11-23 03:35:21,080 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 621 transitions. Word has length 26 [2021-11-23 03:35:21,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:21,080 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 621 transitions. [2021-11-23 03:35:21,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:35:21,081 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 621 transitions. [2021-11-23 03:35:21,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 03:35:21,081 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:21,081 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:21,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 03:35:21,082 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:21,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:21,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1028846060, now seen corresponding path program 1 times [2021-11-23 03:35:21,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:21,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436576519] [2021-11-23 03:35:21,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:21,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:21,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:21,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:35:21,138 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:21,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436576519] [2021-11-23 03:35:21,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436576519] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:21,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:21,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:35:21,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561523443] [2021-11-23 03:35:21,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:21,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:35:21,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:21,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:35:21,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:35:21,140 INFO L87 Difference]: Start difference. First operand 449 states and 621 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:35:21,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:21,529 INFO L93 Difference]: Finished difference Result 640 states and 950 transitions. [2021-11-23 03:35:21,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:35:21,529 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-11-23 03:35:21,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:21,534 INFO L225 Difference]: With dead ends: 640 [2021-11-23 03:35:21,534 INFO L226 Difference]: Without dead ends: 628 [2021-11-23 03:35:21,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:35:21,535 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 400 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:21,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 459 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:35:21,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-11-23 03:35:21,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 441. [2021-11-23 03:35:21,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 334 states have (on average 1.3083832335329342) internal successors, (437), 339 states have internal predecessors, (437), 77 states have call successors, (77), 31 states have call predecessors, (77), 29 states have return successors, (96), 72 states have call predecessors, (96), 69 states have call successors, (96) [2021-11-23 03:35:21,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 610 transitions. [2021-11-23 03:35:21,555 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 610 transitions. Word has length 26 [2021-11-23 03:35:21,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:21,555 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 610 transitions. [2021-11-23 03:35:21,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:35:21,556 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 610 transitions. [2021-11-23 03:35:21,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 03:35:21,556 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:21,556 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:21,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 03:35:21,557 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:21,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:21,557 INFO L85 PathProgramCache]: Analyzing trace with hash -15591929, now seen corresponding path program 1 times [2021-11-23 03:35:21,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:21,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290428984] [2021-11-23 03:35:21,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:21,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:21,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:21,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:35:21,597 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:21,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290428984] [2021-11-23 03:35:21,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290428984] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:21,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:21,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:35:21,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065216646] [2021-11-23 03:35:21,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:21,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:35:21,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:21,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:35:21,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:35:21,599 INFO L87 Difference]: Start difference. First operand 441 states and 610 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:35:21,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:21,979 INFO L93 Difference]: Finished difference Result 630 states and 937 transitions. [2021-11-23 03:35:21,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:35:21,980 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-11-23 03:35:21,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:21,984 INFO L225 Difference]: With dead ends: 630 [2021-11-23 03:35:21,984 INFO L226 Difference]: Without dead ends: 630 [2021-11-23 03:35:21,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:35:21,985 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 487 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:21,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 457 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:35:21,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-11-23 03:35:22,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 441. [2021-11-23 03:35:22,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 334 states have (on average 1.3053892215568863) internal successors, (436), 339 states have internal predecessors, (436), 77 states have call successors, (77), 31 states have call predecessors, (77), 29 states have return successors, (96), 72 states have call predecessors, (96), 69 states have call successors, (96) [2021-11-23 03:35:22,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 609 transitions. [2021-11-23 03:35:22,017 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 609 transitions. Word has length 27 [2021-11-23 03:35:22,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:22,017 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 609 transitions. [2021-11-23 03:35:22,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:35:22,017 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 609 transitions. [2021-11-23 03:35:22,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 03:35:22,018 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:22,018 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:22,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 03:35:22,019 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:22,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:22,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1416730963, now seen corresponding path program 1 times [2021-11-23 03:35:22,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:22,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008698919] [2021-11-23 03:35:22,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:22,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:22,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:22,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:35:22,241 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:22,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008698919] [2021-11-23 03:35:22,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008698919] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:22,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:22,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:35:22,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056088623] [2021-11-23 03:35:22,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:22,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:35:22,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:22,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:35:22,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:35:22,243 INFO L87 Difference]: Start difference. First operand 441 states and 609 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:35:22,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:22,382 INFO L93 Difference]: Finished difference Result 452 states and 620 transitions. [2021-11-23 03:35:22,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:35:22,382 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-23 03:35:22,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:22,385 INFO L225 Difference]: With dead ends: 452 [2021-11-23 03:35:22,385 INFO L226 Difference]: Without dead ends: 451 [2021-11-23 03:35:22,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:35:22,386 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 14 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:22,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 776 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:35:22,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-11-23 03:35:22,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 447. [2021-11-23 03:35:22,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 340 states have (on average 1.3) internal successors, (442), 345 states have internal predecessors, (442), 77 states have call successors, (77), 31 states have call predecessors, (77), 29 states have return successors, (96), 72 states have call predecessors, (96), 69 states have call successors, (96) [2021-11-23 03:35:22,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 615 transitions. [2021-11-23 03:35:22,401 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 615 transitions. Word has length 26 [2021-11-23 03:35:22,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:22,401 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 615 transitions. [2021-11-23 03:35:22,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:35:22,401 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 615 transitions. [2021-11-23 03:35:22,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 03:35:22,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:22,402 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:22,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-23 03:35:22,402 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:22,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:22,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1417007793, now seen corresponding path program 1 times [2021-11-23 03:35:22,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:22,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316760932] [2021-11-23 03:35:22,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:22,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:22,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:22,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:35:22,466 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:22,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316760932] [2021-11-23 03:35:22,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316760932] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:22,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:22,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:35:22,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121670414] [2021-11-23 03:35:22,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:22,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:35:22,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:22,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:35:22,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:35:22,469 INFO L87 Difference]: Start difference. First operand 447 states and 615 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:35:22,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:22,773 INFO L93 Difference]: Finished difference Result 636 states and 941 transitions. [2021-11-23 03:35:22,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:35:22,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-23 03:35:22,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:22,778 INFO L225 Difference]: With dead ends: 636 [2021-11-23 03:35:22,778 INFO L226 Difference]: Without dead ends: 620 [2021-11-23 03:35:22,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:35:22,780 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 325 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:22,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 418 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:35:22,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-11-23 03:35:22,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 431. [2021-11-23 03:35:22,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 324 states have (on average 1.308641975308642) internal successors, (424), 329 states have internal predecessors, (424), 77 states have call successors, (77), 31 states have call predecessors, (77), 29 states have return successors, (96), 72 states have call predecessors, (96), 69 states have call successors, (96) [2021-11-23 03:35:22,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 597 transitions. [2021-11-23 03:35:22,801 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 597 transitions. Word has length 26 [2021-11-23 03:35:22,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:22,802 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 597 transitions. [2021-11-23 03:35:22,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:35:22,802 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 597 transitions. [2021-11-23 03:35:22,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 03:35:22,803 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:22,803 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:22,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-23 03:35:22,804 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:22,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:22,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1380428570, now seen corresponding path program 1 times [2021-11-23 03:35:22,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:22,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379915158] [2021-11-23 03:35:22,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:22,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:22,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:22,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:35:22,998 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:22,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379915158] [2021-11-23 03:35:22,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379915158] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:22,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:22,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 03:35:22,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245474976] [2021-11-23 03:35:23,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:23,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:35:23,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:23,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:35:23,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:35:23,001 INFO L87 Difference]: Start difference. First operand 431 states and 597 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:35:23,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:23,172 INFO L93 Difference]: Finished difference Result 434 states and 599 transitions. [2021-11-23 03:35:23,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:35:23,174 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-11-23 03:35:23,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:23,177 INFO L225 Difference]: With dead ends: 434 [2021-11-23 03:35:23,177 INFO L226 Difference]: Without dead ends: 414 [2021-11-23 03:35:23,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:35:23,178 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 8 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:23,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 944 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:35:23,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-11-23 03:35:23,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 414. [2021-11-23 03:35:23,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 309 states have (on average 1.3203883495145632) internal successors, (408), 314 states have internal predecessors, (408), 76 states have call successors, (76), 30 states have call predecessors, (76), 28 states have return successors, (95), 71 states have call predecessors, (95), 68 states have call successors, (95) [2021-11-23 03:35:23,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 579 transitions. [2021-11-23 03:35:23,193 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 579 transitions. Word has length 28 [2021-11-23 03:35:23,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:23,193 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 579 transitions. [2021-11-23 03:35:23,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:35:23,194 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 579 transitions. [2021-11-23 03:35:23,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 03:35:23,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:23,195 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:23,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-23 03:35:23,196 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:23,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:23,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1996159108, now seen corresponding path program 1 times [2021-11-23 03:35:23,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:23,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778622893] [2021-11-23 03:35:23,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:23,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:23,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:23,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:35:23,245 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:23,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778622893] [2021-11-23 03:35:23,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778622893] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:23,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:23,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:35:23,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279527034] [2021-11-23 03:35:23,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:23,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:35:23,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:23,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:35:23,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:35:23,247 INFO L87 Difference]: Start difference. First operand 414 states and 579 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:35:23,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:23,337 INFO L93 Difference]: Finished difference Result 441 states and 605 transitions. [2021-11-23 03:35:23,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:35:23,337 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-11-23 03:35:23,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:23,340 INFO L225 Difference]: With dead ends: 441 [2021-11-23 03:35:23,340 INFO L226 Difference]: Without dead ends: 412 [2021-11-23 03:35:23,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:35:23,341 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 34 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:23,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 736 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:35:23,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-11-23 03:35:23,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 412. [2021-11-23 03:35:23,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 308 states have (on average 1.3149350649350648) internal successors, (405), 313 states have internal predecessors, (405), 75 states have call successors, (75), 30 states have call predecessors, (75), 28 states have return successors, (94), 70 states have call predecessors, (94), 67 states have call successors, (94) [2021-11-23 03:35:23,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 574 transitions. [2021-11-23 03:35:23,355 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 574 transitions. Word has length 28 [2021-11-23 03:35:23,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:23,356 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 574 transitions. [2021-11-23 03:35:23,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:35:23,356 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 574 transitions. [2021-11-23 03:35:23,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-23 03:35:23,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:23,357 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:23,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-23 03:35:23,357 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:23,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:23,357 INFO L85 PathProgramCache]: Analyzing trace with hash -2090888140, now seen corresponding path program 1 times [2021-11-23 03:35:23,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:23,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170423501] [2021-11-23 03:35:23,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:23,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:23,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:23,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:35:23,383 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:23,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170423501] [2021-11-23 03:35:23,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170423501] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:23,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:23,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:35:23,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378108043] [2021-11-23 03:35:23,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:23,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:35:23,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:23,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:35:23,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:35:23,385 INFO L87 Difference]: Start difference. First operand 412 states and 574 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:35:23,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:23,443 INFO L93 Difference]: Finished difference Result 418 states and 582 transitions. [2021-11-23 03:35:23,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:35:23,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2021-11-23 03:35:23,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:23,447 INFO L225 Difference]: With dead ends: 418 [2021-11-23 03:35:23,447 INFO L226 Difference]: Without dead ends: 418 [2021-11-23 03:35:23,447 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 [2021-11-23 03:35:23,448 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 0 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:23,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 340 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:35:23,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-11-23 03:35:23,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 418. [2021-11-23 03:35:23,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 314 states have (on average 1.3152866242038217) internal successors, (413), 317 states have internal predecessors, (413), 75 states have call successors, (75), 30 states have call predecessors, (75), 28 states have return successors, (94), 70 states have call predecessors, (94), 67 states have call successors, (94) [2021-11-23 03:35:23,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 582 transitions. [2021-11-23 03:35:23,463 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 582 transitions. Word has length 32 [2021-11-23 03:35:23,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:23,463 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 582 transitions. [2021-11-23 03:35:23,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:35:23,463 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 582 transitions. [2021-11-23 03:35:23,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-23 03:35:23,464 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:23,464 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:23,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-23 03:35:23,464 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:23,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:23,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1677831238, now seen corresponding path program 1 times [2021-11-23 03:35:23,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:23,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156190950] [2021-11-23 03:35:23,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:23,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:23,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:23,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:35:23,506 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:23,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156190950] [2021-11-23 03:35:23,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156190950] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:23,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:23,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 03:35:23,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950813526] [2021-11-23 03:35:23,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:23,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:35:23,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:23,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:35:23,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:35:23,508 INFO L87 Difference]: Start difference. First operand 418 states and 582 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:35:23,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:23,649 INFO L93 Difference]: Finished difference Result 417 states and 580 transitions. [2021-11-23 03:35:23,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:35:23,649 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-11-23 03:35:23,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:23,652 INFO L225 Difference]: With dead ends: 417 [2021-11-23 03:35:23,652 INFO L226 Difference]: Without dead ends: 395 [2021-11-23 03:35:23,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:35:23,653 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 10 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:23,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1047 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:35:23,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-11-23 03:35:23,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 395. [2021-11-23 03:35:23,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 294 states have (on average 1.3333333333333333) internal successors, (392), 296 states have internal predecessors, (392), 73 states have call successors, (73), 29 states have call predecessors, (73), 27 states have return successors, (93), 69 states have call predecessors, (93), 66 states have call successors, (93) [2021-11-23 03:35:23,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 558 transitions. [2021-11-23 03:35:23,671 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 558 transitions. Word has length 32 [2021-11-23 03:35:23,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:23,671 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 558 transitions. [2021-11-23 03:35:23,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:35:23,672 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 558 transitions. [2021-11-23 03:35:23,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 03:35:23,673 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:23,673 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:23,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-23 03:35:23,673 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:23,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:23,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1381640600, now seen corresponding path program 1 times [2021-11-23 03:35:23,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:23,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594256180] [2021-11-23 03:35:23,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:23,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:23,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:35:23,701 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:23,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594256180] [2021-11-23 03:35:23,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594256180] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:23,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:23,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:35:23,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816929594] [2021-11-23 03:35:23,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:23,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:35:23,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:23,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:35:23,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:35:23,704 INFO L87 Difference]: Start difference. First operand 395 states and 558 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:35:23,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:23,804 INFO L93 Difference]: Finished difference Result 538 states and 771 transitions. [2021-11-23 03:35:23,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:35:23,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2021-11-23 03:35:23,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:23,808 INFO L225 Difference]: With dead ends: 538 [2021-11-23 03:35:23,808 INFO L226 Difference]: Without dead ends: 538 [2021-11-23 03:35:23,809 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 [2021-11-23 03:35:23,809 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 110 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:23,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 423 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:35:23,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-11-23 03:35:23,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 399. [2021-11-23 03:35:23,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 298 states have (on average 1.3355704697986577) internal successors, (398), 300 states have internal predecessors, (398), 73 states have call successors, (73), 29 states have call predecessors, (73), 27 states have return successors, (93), 69 states have call predecessors, (93), 66 states have call successors, (93) [2021-11-23 03:35:23,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 564 transitions. [2021-11-23 03:35:23,827 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 564 transitions. Word has length 35 [2021-11-23 03:35:23,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:23,827 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 564 transitions. [2021-11-23 03:35:23,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:35:23,828 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 564 transitions. [2021-11-23 03:35:23,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-23 03:35:23,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:23,829 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:23,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-23 03:35:23,829 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:23,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:23,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1343302093, now seen corresponding path program 1 times [2021-11-23 03:35:23,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:23,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301646536] [2021-11-23 03:35:23,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:23,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:23,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:23,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:35:23,859 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:23,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301646536] [2021-11-23 03:35:23,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301646536] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:23,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:23,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:35:23,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159178014] [2021-11-23 03:35:23,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:23,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:35:23,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:23,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:35:23,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:35:23,861 INFO L87 Difference]: Start difference. First operand 399 states and 564 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:35:23,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:23,941 INFO L93 Difference]: Finished difference Result 410 states and 574 transitions. [2021-11-23 03:35:23,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:35:23,942 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-11-23 03:35:23,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:23,944 INFO L225 Difference]: With dead ends: 410 [2021-11-23 03:35:23,945 INFO L226 Difference]: Without dead ends: 385 [2021-11-23 03:35:23,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:35:23,946 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 23 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:23,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 680 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:35:23,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-11-23 03:35:23,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 385. [2021-11-23 03:35:23,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 286 states have (on average 1.3426573426573427) internal successors, (384), 288 states have internal predecessors, (384), 72 states have call successors, (72), 28 states have call predecessors, (72), 26 states have return successors, (92), 68 states have call predecessors, (92), 65 states have call successors, (92) [2021-11-23 03:35:23,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 548 transitions. [2021-11-23 03:35:23,958 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 548 transitions. Word has length 32 [2021-11-23 03:35:23,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:23,959 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 548 transitions. [2021-11-23 03:35:23,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:35:23,959 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 548 transitions. [2021-11-23 03:35:23,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 03:35:23,960 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:23,960 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:23,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-23 03:35:23,961 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:23,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:23,961 INFO L85 PathProgramCache]: Analyzing trace with hash 498700032, now seen corresponding path program 1 times [2021-11-23 03:35:23,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:23,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708614558] [2021-11-23 03:35:23,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:23,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:23,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:23,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:35:23,991 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:23,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708614558] [2021-11-23 03:35:23,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708614558] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:23,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:23,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:35:23,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124632584] [2021-11-23 03:35:23,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:23,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:35:23,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:23,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:35:23,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:35:23,993 INFO L87 Difference]: Start difference. First operand 385 states and 548 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:35:24,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:24,049 INFO L93 Difference]: Finished difference Result 718 states and 1052 transitions. [2021-11-23 03:35:24,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:35:24,050 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2021-11-23 03:35:24,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:24,055 INFO L225 Difference]: With dead ends: 718 [2021-11-23 03:35:24,055 INFO L226 Difference]: Without dead ends: 718 [2021-11-23 03:35:24,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:35:24,056 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 152 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:24,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 367 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:35:24,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-11-23 03:35:24,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 648. [2021-11-23 03:35:24,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 483 states have (on average 1.3685300207039337) internal successors, (661), 484 states have internal predecessors, (661), 119 states have call successors, (119), 48 states have call predecessors, (119), 45 states have return successors, (188), 115 states have call predecessors, (188), 112 states have call successors, (188) [2021-11-23 03:35:24,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 968 transitions. [2021-11-23 03:35:24,079 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 968 transitions. Word has length 37 [2021-11-23 03:35:24,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:24,080 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 968 transitions. [2021-11-23 03:35:24,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:35:24,080 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 968 transitions. [2021-11-23 03:35:24,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 03:35:24,081 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:24,081 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:24,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-23 03:35:24,081 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:24,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:24,082 INFO L85 PathProgramCache]: Analyzing trace with hash -489083578, now seen corresponding path program 1 times [2021-11-23 03:35:24,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:24,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648338943] [2021-11-23 03:35:24,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:24,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:24,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:24,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:35:24,182 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:24,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648338943] [2021-11-23 03:35:24,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648338943] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:24,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:24,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 03:35:24,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904589380] [2021-11-23 03:35:24,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:24,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:35:24,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:24,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:35:24,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:35:24,184 INFO L87 Difference]: Start difference. First operand 648 states and 968 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 03:35:24,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:24,282 INFO L93 Difference]: Finished difference Result 670 states and 1008 transitions. [2021-11-23 03:35:24,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:35:24,283 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2021-11-23 03:35:24,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:24,288 INFO L225 Difference]: With dead ends: 670 [2021-11-23 03:35:24,288 INFO L226 Difference]: Without dead ends: 670 [2021-11-23 03:35:24,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:35:24,289 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 13 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:24,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 822 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:35:24,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-11-23 03:35:24,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 670. [2021-11-23 03:35:24,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 499 states have (on average 1.3607214428857715) internal successors, (679), 504 states have internal predecessors, (679), 123 states have call successors, (123), 48 states have call predecessors, (123), 47 states have return successors, (206), 117 states have call predecessors, (206), 116 states have call successors, (206) [2021-11-23 03:35:24,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1008 transitions. [2021-11-23 03:35:24,312 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1008 transitions. Word has length 37 [2021-11-23 03:35:24,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:24,313 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 1008 transitions. [2021-11-23 03:35:24,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 03:35:24,313 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1008 transitions. [2021-11-23 03:35:24,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-23 03:35:24,314 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:24,314 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:24,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-23 03:35:24,314 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:24,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:24,315 INFO L85 PathProgramCache]: Analyzing trace with hash 525748074, now seen corresponding path program 1 times [2021-11-23 03:35:24,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:24,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303862721] [2021-11-23 03:35:24,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:24,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:24,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:24,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:35:24,349 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:24,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303862721] [2021-11-23 03:35:24,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303862721] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:24,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:24,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:35:24,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853174213] [2021-11-23 03:35:24,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:24,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:35:24,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:24,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:35:24,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:35:24,351 INFO L87 Difference]: Start difference. First operand 670 states and 1008 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:35:24,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:24,440 INFO L93 Difference]: Finished difference Result 210 states and 291 transitions. [2021-11-23 03:35:24,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:35:24,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2021-11-23 03:35:24,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:24,442 INFO L225 Difference]: With dead ends: 210 [2021-11-23 03:35:24,442 INFO L226 Difference]: Without dead ends: 210 [2021-11-23 03:35:24,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:35:24,443 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 150 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:24,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 224 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:35:24,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-23 03:35:24,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 174. [2021-11-23 03:35:24,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 127 states have (on average 1.2598425196850394) internal successors, (160), 128 states have internal predecessors, (160), 35 states have call successors, (35), 13 states have call predecessors, (35), 11 states have return successors, (39), 32 states have call predecessors, (39), 32 states have call successors, (39) [2021-11-23 03:35:24,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 234 transitions. [2021-11-23 03:35:24,450 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 234 transitions. Word has length 39 [2021-11-23 03:35:24,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:24,450 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 234 transitions. [2021-11-23 03:35:24,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:35:24,450 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 234 transitions. [2021-11-23 03:35:24,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-23 03:35:24,451 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:24,451 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:24,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-23 03:35:24,451 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:24,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:24,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1025002463, now seen corresponding path program 1 times [2021-11-23 03:35:24,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:24,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047261926] [2021-11-23 03:35:24,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:24,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:24,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:24,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:35:24,503 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:24,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047261926] [2021-11-23 03:35:24,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047261926] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:24,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:24,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:35:24,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497101321] [2021-11-23 03:35:24,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:24,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:35:24,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:24,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:35:24,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:35:24,505 INFO L87 Difference]: Start difference. First operand 174 states and 234 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 03:35:24,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:24,641 INFO L93 Difference]: Finished difference Result 174 states and 233 transitions. [2021-11-23 03:35:24,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:35:24,641 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2021-11-23 03:35:24,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:24,643 INFO L225 Difference]: With dead ends: 174 [2021-11-23 03:35:24,643 INFO L226 Difference]: Without dead ends: 174 [2021-11-23 03:35:24,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:35:24,644 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 143 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:24,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 283 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:35:24,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-23 03:35:24,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2021-11-23 03:35:24,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 127 states have (on average 1.2519685039370079) internal successors, (159), 128 states have internal predecessors, (159), 35 states have call successors, (35), 13 states have call predecessors, (35), 11 states have return successors, (39), 32 states have call predecessors, (39), 32 states have call successors, (39) [2021-11-23 03:35:24,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 233 transitions. [2021-11-23 03:35:24,650 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 233 transitions. Word has length 41 [2021-11-23 03:35:24,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:24,650 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 233 transitions. [2021-11-23 03:35:24,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 03:35:24,651 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 233 transitions. [2021-11-23 03:35:24,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-23 03:35:24,651 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:24,652 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:24,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-23 03:35:24,652 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:24,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:24,653 INFO L85 PathProgramCache]: Analyzing trace with hash 436962109, now seen corresponding path program 1 times [2021-11-23 03:35:24,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:24,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881473526] [2021-11-23 03:35:24,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:24,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:24,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:24,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:35:24,861 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:24,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881473526] [2021-11-23 03:35:24,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881473526] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:24,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:24,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 03:35:24,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992377262] [2021-11-23 03:35:24,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:24,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 03:35:24,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:24,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 03:35:24,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:35:24,863 INFO L87 Difference]: Start difference. First operand 174 states and 233 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 03:35:25,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:25,259 INFO L93 Difference]: Finished difference Result 200 states and 265 transitions. [2021-11-23 03:35:25,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:35:25,260 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2021-11-23 03:35:25,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:25,261 INFO L225 Difference]: With dead ends: 200 [2021-11-23 03:35:25,261 INFO L226 Difference]: Without dead ends: 200 [2021-11-23 03:35:25,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-11-23 03:35:25,262 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 363 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:25,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 416 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:35:25,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-23 03:35:25,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 180. [2021-11-23 03:35:25,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 130 states have (on average 1.2461538461538462) internal successors, (162), 132 states have internal predecessors, (162), 36 states have call successors, (36), 14 states have call predecessors, (36), 13 states have return successors, (42), 33 states have call predecessors, (42), 33 states have call successors, (42) [2021-11-23 03:35:25,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 240 transitions. [2021-11-23 03:35:25,270 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 240 transitions. Word has length 42 [2021-11-23 03:35:25,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:25,270 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 240 transitions. [2021-11-23 03:35:25,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 03:35:25,271 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 240 transitions. [2021-11-23 03:35:25,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-23 03:35:25,272 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:25,272 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:25,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-23 03:35:25,272 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:25,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:25,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1759084436, now seen corresponding path program 1 times [2021-11-23 03:35:25,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:25,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696850023] [2021-11-23 03:35:25,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:25,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:25,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:25,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:35:25,369 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:25,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696850023] [2021-11-23 03:35:25,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696850023] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:25,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:25,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 03:35:25,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483060688] [2021-11-23 03:35:25,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:25,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 03:35:25,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:25,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 03:35:25,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:35:25,372 INFO L87 Difference]: Start difference. First operand 180 states and 240 transitions. Second operand has 9 states, 7 states have (on average 5.428571428571429) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 03:35:25,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:25,678 INFO L93 Difference]: Finished difference Result 174 states and 231 transitions. [2021-11-23 03:35:25,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 03:35:25,678 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 5.428571428571429) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2021-11-23 03:35:25,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:25,680 INFO L225 Difference]: With dead ends: 174 [2021-11-23 03:35:25,680 INFO L226 Difference]: Without dead ends: 174 [2021-11-23 03:35:25,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:35:25,681 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 38 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:25,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 637 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:35:25,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-23 03:35:25,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2021-11-23 03:35:25,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 127 states have (on average 1.2440944881889764) internal successors, (158), 129 states have internal predecessors, (158), 33 states have call successors, (33), 15 states have call predecessors, (33), 13 states have return successors, (40), 29 states have call predecessors, (40), 30 states have call successors, (40) [2021-11-23 03:35:25,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 231 transitions. [2021-11-23 03:35:25,686 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 231 transitions. Word has length 50 [2021-11-23 03:35:25,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:25,687 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 231 transitions. [2021-11-23 03:35:25,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 5.428571428571429) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 03:35:25,687 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 231 transitions. [2021-11-23 03:35:25,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-23 03:35:25,688 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:25,689 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:25,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-23 03:35:25,689 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:25,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:25,690 INFO L85 PathProgramCache]: Analyzing trace with hash 946985235, now seen corresponding path program 1 times [2021-11-23 03:35:25,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:25,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25555321] [2021-11-23 03:35:25,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:25,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:25,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:25,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:35:25,874 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:25,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25555321] [2021-11-23 03:35:25,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25555321] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:25,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:25,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-23 03:35:25,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706585193] [2021-11-23 03:35:25,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:25,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 03:35:25,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:25,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 03:35:25,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-11-23 03:35:25,877 INFO L87 Difference]: Start difference. First operand 174 states and 231 transitions. Second operand has 13 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 03:35:26,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:26,091 INFO L93 Difference]: Finished difference Result 190 states and 247 transitions. [2021-11-23 03:35:26,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 03:35:26,091 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 58 [2021-11-23 03:35:26,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:26,093 INFO L225 Difference]: With dead ends: 190 [2021-11-23 03:35:26,093 INFO L226 Difference]: Without dead ends: 174 [2021-11-23 03:35:26,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:35:26,094 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 41 mSDsluCounter, 1409 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1405 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:26,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 1405 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:35:26,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-23 03:35:26,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2021-11-23 03:35:26,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 127 states have (on average 1.2440944881889764) internal successors, (158), 129 states have internal predecessors, (158), 33 states have call successors, (33), 15 states have call predecessors, (33), 13 states have return successors, (39), 29 states have call predecessors, (39), 30 states have call successors, (39) [2021-11-23 03:35:26,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 230 transitions. [2021-11-23 03:35:26,105 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 230 transitions. Word has length 58 [2021-11-23 03:35:26,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:26,105 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 230 transitions. [2021-11-23 03:35:26,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 03:35:26,105 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 230 transitions. [2021-11-23 03:35:26,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-23 03:35:26,106 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:26,106 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:26,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-23 03:35:26,107 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:26,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:26,107 INFO L85 PathProgramCache]: Analyzing trace with hash 745663820, now seen corresponding path program 1 times [2021-11-23 03:35:26,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:26,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676344299] [2021-11-23 03:35:26,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:26,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:26,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:26,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:35:26,283 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:26,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676344299] [2021-11-23 03:35:26,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676344299] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:26,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:26,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-23 03:35:26,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876370874] [2021-11-23 03:35:26,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:26,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 03:35:26,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:26,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 03:35:26,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-11-23 03:35:26,286 INFO L87 Difference]: Start difference. First operand 174 states and 230 transitions. Second operand has 13 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 03:35:26,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:26,519 INFO L93 Difference]: Finished difference Result 259 states and 366 transitions. [2021-11-23 03:35:26,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 03:35:26,520 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 63 [2021-11-23 03:35:26,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:26,524 INFO L225 Difference]: With dead ends: 259 [2021-11-23 03:35:26,525 INFO L226 Difference]: Without dead ends: 238 [2021-11-23 03:35:26,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:35:26,526 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 83 mSDsluCounter, 2150 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 2188 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:26,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 2188 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:35:26,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-11-23 03:35:26,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2021-11-23 03:35:26,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 173 states have (on average 1.2658959537572254) internal successors, (219), 175 states have internal predecessors, (219), 51 states have call successors, (51), 15 states have call predecessors, (51), 13 states have return successors, (62), 47 states have call predecessors, (62), 47 states have call successors, (62) [2021-11-23 03:35:26,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 332 transitions. [2021-11-23 03:35:26,535 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 332 transitions. Word has length 63 [2021-11-23 03:35:26,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:26,536 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 332 transitions. [2021-11-23 03:35:26,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 03:35:26,536 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 332 transitions. [2021-11-23 03:35:26,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 03:35:26,542 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:26,543 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:26,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-23 03:35:26,543 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:26,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:26,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1879025492, now seen corresponding path program 1 times [2021-11-23 03:35:26,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:26,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988521393] [2021-11-23 03:35:26,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:26,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:26,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:26,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:35:26,647 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:26,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988521393] [2021-11-23 03:35:26,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988521393] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:26,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:26,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-23 03:35:26,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375712422] [2021-11-23 03:35:26,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:26,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 03:35:26,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:26,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 03:35:26,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-23 03:35:26,650 INFO L87 Difference]: Start difference. First operand 238 states and 332 transitions. Second operand has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-23 03:35:26,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:26,888 INFO L93 Difference]: Finished difference Result 253 states and 345 transitions. [2021-11-23 03:35:26,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 03:35:26,889 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 65 [2021-11-23 03:35:26,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:26,891 INFO L225 Difference]: With dead ends: 253 [2021-11-23 03:35:26,891 INFO L226 Difference]: Without dead ends: 235 [2021-11-23 03:35:26,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-11-23 03:35:26,892 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 153 mSDsluCounter, 967 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:26,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 990 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:35:26,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-11-23 03:35:26,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 233. [2021-11-23 03:35:26,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 170 states have (on average 1.2647058823529411) internal successors, (215), 172 states have internal predecessors, (215), 49 states have call successors, (49), 15 states have call predecessors, (49), 13 states have return successors, (60), 45 states have call predecessors, (60), 45 states have call successors, (60) [2021-11-23 03:35:26,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 324 transitions. [2021-11-23 03:35:26,899 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 324 transitions. Word has length 65 [2021-11-23 03:35:26,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:26,900 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 324 transitions. [2021-11-23 03:35:26,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-23 03:35:26,900 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 324 transitions. [2021-11-23 03:35:26,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 03:35:26,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:26,901 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:26,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-23 03:35:26,902 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:26,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:26,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1757245150, now seen corresponding path program 1 times [2021-11-23 03:35:26,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:26,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190376580] [2021-11-23 03:35:26,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:26,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:26,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:27,089 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 03:35:27,089 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:27,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190376580] [2021-11-23 03:35:27,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190376580] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:27,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:27,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 03:35:27,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607300265] [2021-11-23 03:35:27,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:27,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:35:27,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:27,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:35:27,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:35:27,094 INFO L87 Difference]: Start difference. First operand 233 states and 324 transitions. Second operand has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 03:35:27,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:27,472 INFO L93 Difference]: Finished difference Result 277 states and 380 transitions. [2021-11-23 03:35:27,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:35:27,472 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 70 [2021-11-23 03:35:27,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:27,474 INFO L225 Difference]: With dead ends: 277 [2021-11-23 03:35:27,475 INFO L226 Difference]: Without dead ends: 274 [2021-11-23 03:35:27,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:35:27,476 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 318 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:27,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 395 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:35:27,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-23 03:35:27,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 241. [2021-11-23 03:35:27,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 175 states have (on average 1.2685714285714285) internal successors, (222), 179 states have internal predecessors, (222), 51 states have call successors, (51), 16 states have call predecessors, (51), 14 states have return successors, (62), 45 states have call predecessors, (62), 47 states have call successors, (62) [2021-11-23 03:35:27,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 335 transitions. [2021-11-23 03:35:27,485 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 335 transitions. Word has length 70 [2021-11-23 03:35:27,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:27,485 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 335 transitions. [2021-11-23 03:35:27,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 03:35:27,486 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 335 transitions. [2021-11-23 03:35:27,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 03:35:27,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:27,487 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:27,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-23 03:35:27,487 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:27,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:27,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1075414213, now seen corresponding path program 1 times [2021-11-23 03:35:27,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:27,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829042077] [2021-11-23 03:35:27,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:27,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:27,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:27,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:35:27,592 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:27,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829042077] [2021-11-23 03:35:27,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829042077] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:27,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:27,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-23 03:35:27,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53095945] [2021-11-23 03:35:27,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:27,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 03:35:27,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:27,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 03:35:27,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-23 03:35:27,596 INFO L87 Difference]: Start difference. First operand 241 states and 335 transitions. Second operand has 10 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-23 03:35:27,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:27,897 INFO L93 Difference]: Finished difference Result 242 states and 334 transitions. [2021-11-23 03:35:27,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 03:35:27,898 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 70 [2021-11-23 03:35:27,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:27,900 INFO L225 Difference]: With dead ends: 242 [2021-11-23 03:35:27,900 INFO L226 Difference]: Without dead ends: 217 [2021-11-23 03:35:27,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-11-23 03:35:27,901 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 216 mSDsluCounter, 1109 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 1181 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:27,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 1181 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:35:27,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-11-23 03:35:27,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 148. [2021-11-23 03:35:27,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 104 states have (on average 1.1826923076923077) internal successors, (123), 107 states have internal predecessors, (123), 30 states have call successors, (30), 15 states have call predecessors, (30), 13 states have return successors, (34), 25 states have call predecessors, (34), 27 states have call successors, (34) [2021-11-23 03:35:27,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 187 transitions. [2021-11-23 03:35:27,907 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 187 transitions. Word has length 70 [2021-11-23 03:35:27,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:27,907 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 187 transitions. [2021-11-23 03:35:27,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-23 03:35:27,907 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 187 transitions. [2021-11-23 03:35:27,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-23 03:35:27,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:27,908 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:27,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-23 03:35:27,909 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:27,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:27,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1814231975, now seen corresponding path program 1 times [2021-11-23 03:35:27,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:27,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549090007] [2021-11-23 03:35:27,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:27,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:27,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:27,958 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 03:35:27,959 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:27,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549090007] [2021-11-23 03:35:27,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549090007] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:27,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:27,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:35:27,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018383790] [2021-11-23 03:35:27,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:27,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:35:27,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:27,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:35:27,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:35:27,961 INFO L87 Difference]: Start difference. First operand 148 states and 187 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 03:35:28,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:28,124 INFO L93 Difference]: Finished difference Result 170 states and 201 transitions. [2021-11-23 03:35:28,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:35:28,125 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 78 [2021-11-23 03:35:28,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:28,126 INFO L225 Difference]: With dead ends: 170 [2021-11-23 03:35:28,126 INFO L226 Difference]: Without dead ends: 169 [2021-11-23 03:35:28,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:35:28,127 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 103 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:28,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 260 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:35:28,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-23 03:35:28,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2021-11-23 03:35:28,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 119 states have (on average 1.1260504201680672) internal successors, (134), 124 states have internal predecessors, (134), 32 states have call successors, (32), 19 states have call predecessors, (32), 17 states have return successors, (33), 25 states have call predecessors, (33), 29 states have call successors, (33) [2021-11-23 03:35:28,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 199 transitions. [2021-11-23 03:35:28,132 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 199 transitions. Word has length 78 [2021-11-23 03:35:28,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:28,133 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 199 transitions. [2021-11-23 03:35:28,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 03:35:28,133 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 199 transitions. [2021-11-23 03:35:28,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 03:35:28,134 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:28,135 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:28,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-11-23 03:35:28,137 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:28,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:28,139 INFO L85 PathProgramCache]: Analyzing trace with hash 549176524, now seen corresponding path program 1 times [2021-11-23 03:35:28,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:28,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213817787] [2021-11-23 03:35:28,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:28,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:28,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:28,374 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-23 03:35:28,374 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:28,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213817787] [2021-11-23 03:35:28,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213817787] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:28,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:28,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 03:35:28,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946387112] [2021-11-23 03:35:28,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:28,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:35:28,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:28,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:35:28,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:35:28,376 INFO L87 Difference]: Start difference. First operand 169 states and 199 transitions. Second operand has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 03:35:28,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:28,694 INFO L93 Difference]: Finished difference Result 208 states and 244 transitions. [2021-11-23 03:35:28,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:35:28,695 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 99 [2021-11-23 03:35:28,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:28,696 INFO L225 Difference]: With dead ends: 208 [2021-11-23 03:35:28,696 INFO L226 Difference]: Without dead ends: 204 [2021-11-23 03:35:28,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:35:28,697 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 301 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:28,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 251 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:35:28,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-23 03:35:28,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 170. [2021-11-23 03:35:28,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 119 states have (on average 1.1092436974789917) internal successors, (132), 125 states have internal predecessors, (132), 32 states have call successors, (32), 20 states have call predecessors, (32), 18 states have return successors, (33), 24 states have call predecessors, (33), 29 states have call successors, (33) [2021-11-23 03:35:28,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 197 transitions. [2021-11-23 03:35:28,703 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 197 transitions. Word has length 99 [2021-11-23 03:35:28,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:28,704 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 197 transitions. [2021-11-23 03:35:28,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 03:35:28,704 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 197 transitions. [2021-11-23 03:35:28,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-23 03:35:28,707 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:28,707 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:28,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-11-23 03:35:28,708 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:28,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:28,708 INFO L85 PathProgramCache]: Analyzing trace with hash -196019302, now seen corresponding path program 1 times [2021-11-23 03:35:28,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:28,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356040206] [2021-11-23 03:35:28,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:28,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:28,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:29,022 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-23 03:35:29,023 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:29,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356040206] [2021-11-23 03:35:29,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356040206] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:35:29,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909083342] [2021-11-23 03:35:29,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:29,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:35:29,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26147c09-4ce7-461e-9233-d1adf6188fa2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:35:29,025 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26147c09-4ce7-461e-9233-d1adf6188fa2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:35:29,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26147c09-4ce7-461e-9233-d1adf6188fa2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:35:29,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:29,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 942 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 03:35:29,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:35:29,667 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-23 03:35:29,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:35:29,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909083342] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:29,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:35:29,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-11-23 03:35:29,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738414888] [2021-11-23 03:35:29,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:29,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:35:29,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:29,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:35:29,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-23 03:35:29,674 INFO L87 Difference]: Start difference. First operand 170 states and 197 transitions. Second operand has 7 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-23 03:35:29,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:29,879 INFO L93 Difference]: Finished difference Result 196 states and 226 transitions. [2021-11-23 03:35:29,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:35:29,880 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 126 [2021-11-23 03:35:29,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:29,881 INFO L225 Difference]: With dead ends: 196 [2021-11-23 03:35:29,881 INFO L226 Difference]: Without dead ends: 192 [2021-11-23 03:35:29,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-11-23 03:35:29,882 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 111 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:29,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 417 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:35:29,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-23 03:35:29,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 155. [2021-11-23 03:35:29,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 109 states have (on average 1.091743119266055) internal successors, (119), 115 states have internal predecessors, (119), 28 states have call successors, (28), 17 states have call predecessors, (28), 17 states have return successors, (30), 22 states have call predecessors, (30), 26 states have call successors, (30) [2021-11-23 03:35:29,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 177 transitions. [2021-11-23 03:35:29,888 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 177 transitions. Word has length 126 [2021-11-23 03:35:29,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:29,888 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 177 transitions. [2021-11-23 03:35:29,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-23 03:35:29,889 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 177 transitions. [2021-11-23 03:35:29,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-23 03:35:29,890 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:29,891 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:29,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26147c09-4ce7-461e-9233-d1adf6188fa2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:35:30,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26147c09-4ce7-461e-9233-d1adf6188fa2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:35:30,116 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK === [errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2021-11-23 03:35:30,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:30,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1551808924, now seen corresponding path program 1 times [2021-11-23 03:35:30,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:30,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138111997] [2021-11-23 03:35:30,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:30,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:30,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:30,351 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-23 03:35:30,351 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:30,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138111997] [2021-11-23 03:35:30,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138111997] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:30,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:30,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 03:35:30,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815594321] [2021-11-23 03:35:30,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:30,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:35:30,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:30,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:35:30,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:35:30,354 INFO L87 Difference]: Start difference. First operand 155 states and 177 transitions. Second operand has 8 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-23 03:35:30,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:30,690 INFO L93 Difference]: Finished difference Result 175 states and 202 transitions. [2021-11-23 03:35:30,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:35:30,691 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 128 [2021-11-23 03:35:30,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:30,692 INFO L225 Difference]: With dead ends: 175 [2021-11-23 03:35:30,692 INFO L226 Difference]: Without dead ends: 0 [2021-11-23 03:35:30,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:35:30,692 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 308 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:30,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 252 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:35:30,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-23 03:35:30,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-23 03:35:30,693 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) [2021-11-23 03:35:30,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-23 03:35:30,693 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 128 [2021-11-23 03:35:30,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:30,694 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-23 03:35:30,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-23 03:35:30,694 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-23 03:35:30,694 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-23 03:35:30,696 INFO L764 garLoopResultBuilder]: Registering result SAFE for location errorFnErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 2 remaining) [2021-11-23 03:35:30,697 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 2 remaining) [2021-11-23 03:35:30,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-11-23 03:35:30,706 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:30,709 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 03:35:30,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:35:30 BoogieIcfgContainer [2021-11-23 03:35:30,714 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 03:35:30,715 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 03:35:30,715 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 03:35:30,715 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 03:35:30,716 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:35:16" (3/4) ... [2021-11-23 03:35:30,718 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-23 03:35:30,724 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure IoBuildDeviceIoControlRequest [2021-11-23 03:35:30,724 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure KeWaitForSingleObject [2021-11-23 03:35:30,724 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure DiskPerfForwardIrpSynchronous [2021-11-23 03:35:30,724 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure IofCompleteRequest [2021-11-23 03:35:30,724 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure errorFn [2021-11-23 03:35:30,726 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure IofCallDriver [2021-11-23 03:35:30,726 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure DiskPerfIrpCompletion [2021-11-23 03:35:30,726 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure stubMoreProcessingRequired [2021-11-23 03:35:30,726 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure DiskPerfIoCompletion [2021-11-23 03:35:30,777 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 97 nodes and edges [2021-11-23 03:35:30,780 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 33 nodes and edges [2021-11-23 03:35:30,782 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-11-23 03:35:30,784 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-23 03:35:30,944 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26147c09-4ce7-461e-9233-d1adf6188fa2/bin/utaipan-EQgc7hIp5V/witness.graphml [2021-11-23 03:35:30,944 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 03:35:30,947 INFO L158 Benchmark]: Toolchain (without parser) took 16917.35ms. Allocated memory was 104.9MB in the beginning and 257.9MB in the end (delta: 153.1MB). Free memory was 62.8MB in the beginning and 208.9MB in the end (delta: -146.1MB). Peak memory consumption was 138.0MB. Max. memory is 16.1GB. [2021-11-23 03:35:30,947 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 104.9MB. Free memory is still 80.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:35:30,947 INFO L158 Benchmark]: CACSL2BoogieTranslator took 586.66ms. Allocated memory is still 104.9MB. Free memory was 62.6MB in the beginning and 67.1MB in the end (delta: -4.5MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-23 03:35:30,948 INFO L158 Benchmark]: Boogie Procedure Inliner took 124.40ms. Allocated memory is still 104.9MB. Free memory was 67.1MB in the beginning and 62.5MB in the end (delta: 4.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-23 03:35:30,948 INFO L158 Benchmark]: Boogie Preprocessor took 106.57ms. Allocated memory is still 104.9MB. Free memory was 62.5MB in the beginning and 59.6MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:35:30,948 INFO L158 Benchmark]: RCFGBuilder took 1250.32ms. Allocated memory was 104.9MB in the beginning and 130.0MB in the end (delta: 25.2MB). Free memory was 59.6MB in the beginning and 68.8MB in the end (delta: -9.2MB). Peak memory consumption was 31.8MB. Max. memory is 16.1GB. [2021-11-23 03:35:30,949 INFO L158 Benchmark]: TraceAbstraction took 14597.55ms. Allocated memory was 130.0MB in the beginning and 257.9MB in the end (delta: 127.9MB). Free memory was 68.8MB in the beginning and 81.5MB in the end (delta: -12.7MB). Peak memory consumption was 114.9MB. Max. memory is 16.1GB. [2021-11-23 03:35:30,949 INFO L158 Benchmark]: Witness Printer took 229.35ms. Allocated memory is still 257.9MB. Free memory was 81.5MB in the beginning and 208.9MB in the end (delta: -127.3MB). Peak memory consumption was 3.7MB. Max. memory is 16.1GB. [2021-11-23 03:35:30,951 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 104.9MB. Free memory is still 80.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 586.66ms. Allocated memory is still 104.9MB. Free memory was 62.6MB in the beginning and 67.1MB in the end (delta: -4.5MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 124.40ms. Allocated memory is still 104.9MB. Free memory was 67.1MB in the beginning and 62.5MB in the end (delta: 4.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 106.57ms. Allocated memory is still 104.9MB. Free memory was 62.5MB in the beginning and 59.6MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1250.32ms. Allocated memory was 104.9MB in the beginning and 130.0MB in the end (delta: 25.2MB). Free memory was 59.6MB in the beginning and 68.8MB in the end (delta: -9.2MB). Peak memory consumption was 31.8MB. Max. memory is 16.1GB. * TraceAbstraction took 14597.55ms. Allocated memory was 130.0MB in the beginning and 257.9MB in the end (delta: 127.9MB). Free memory was 68.8MB in the beginning and 81.5MB in the end (delta: -12.7MB). Peak memory consumption was 114.9MB. Max. memory is 16.1GB. * Witness Printer took 229.35ms. Allocated memory is still 257.9MB. Free memory was 81.5MB in the beginning and 208.9MB in the end (delta: -127.3MB). Peak memory consumption was 3.7MB. 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: 56]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 647]: 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 10 procedures, 190 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 14.5s, OverallIterations: 42, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 8.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6813 SdHoareTripleChecker+Valid, 6.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6689 mSDsluCounter, 23788 SdHoareTripleChecker+Invalid, 5.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 17435 mSDsCounter, 895 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7420 IncrementalHoareTripleChecker+Invalid, 8315 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 895 mSolverCounterUnsat, 8236 mSDtfsCounter, 7420 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 428 GetRequests, 206 SyntacticMatches, 5 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=691occurred in iteration=14, InterpolantAutomatonStates: 228, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 42 MinimizatonAttempts, 1581 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 1725 NumberOfCodeBlocks, 1725 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 1682 ConstructedInterpolants, 0 QuantifiedInterpolants, 4899 SizeOfPredicates, 6 NumberOfNonLiveVariables, 942 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 43 InterpolantComputations, 42 PerfectInterpolantSequences, 426/434 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-11-23 03:35:31,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26147c09-4ce7-461e-9233-d1adf6188fa2/bin/utaipan-EQgc7hIp5V/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