./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/heap-manipulation/dancing.i --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_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/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_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/heap-manipulation/dancing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/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_501f5d3c-3674-4075-be10-6b03054429df/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 c2e0266b63b958a771d0226973905d5a39a7a28d05d194ae66381394d9ab520a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 01:52:13,539 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 01:52:13,542 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 01:52:13,583 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 01:52:13,584 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 01:52:13,586 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 01:52:13,588 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 01:52:13,591 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 01:52:13,594 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 01:52:13,596 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 01:52:13,597 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 01:52:13,600 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 01:52:13,600 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 01:52:13,602 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 01:52:13,605 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 01:52:13,607 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 01:52:13,609 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 01:52:13,610 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 01:52:13,613 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 01:52:13,616 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 01:52:13,619 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 01:52:13,621 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 01:52:13,623 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 01:52:13,625 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 01:52:13,630 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 01:52:13,631 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 01:52:13,631 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 01:52:13,633 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 01:52:13,634 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 01:52:13,636 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 01:52:13,636 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 01:52:13,638 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 01:52:13,639 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 01:52:13,641 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 01:52:13,643 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 01:52:13,644 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 01:52:13,645 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 01:52:13,646 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 01:52:13,646 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 01:52:13,648 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 01:52:13,649 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 01:52:13,651 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-23 01:52:13,682 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 01:52:13,682 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 01:52:13,683 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 01:52:13,683 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 01:52:13,684 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 01:52:13,686 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 01:52:13,686 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 01:52:13,687 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 01:52:13,687 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 01:52:13,688 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 01:52:13,689 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 01:52:13,689 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 01:52:13,690 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 01:52:13,690 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 01:52:13,690 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 01:52:13,691 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 01:52:13,691 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 01:52:13,691 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 01:52:13,692 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 01:52:13,692 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 01:52:13,693 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 01:52:13,693 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 01:52:13,693 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 01:52:13,695 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 01:52:13,696 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 01:52:13,696 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 01:52:13,696 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 01:52:13,697 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 01:52:13,697 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 01:52:13,697 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 01:52:13,698 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 01:52:13,698 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 01:52:13,698 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 01:52:13,699 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 01:52:13,699 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 01:52:13,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 01:52:13,700 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 01:52:13,700 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 01:52:13,700 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 01:52:13,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 01:52:13,701 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 01:52:13,701 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 01:52:13,701 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_501f5d3c-3674-4075-be10-6b03054429df/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2e0266b63b958a771d0226973905d5a39a7a28d05d194ae66381394d9ab520a [2021-11-23 01:52:14,108 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 01:52:14,132 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 01:52:14,135 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 01:52:14,137 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 01:52:14,138 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 01:52:14,140 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/heap-manipulation/dancing.i [2021-11-23 01:52:14,224 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/data/273708d90/806db536f67448d28e0765424d60ab55/FLAG8eafb8b8f [2021-11-23 01:52:14,809 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 01:52:14,810 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/sv-benchmarks/c/heap-manipulation/dancing.i [2021-11-23 01:52:14,827 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/data/273708d90/806db536f67448d28e0765424d60ab55/FLAG8eafb8b8f [2021-11-23 01:52:15,121 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/data/273708d90/806db536f67448d28e0765424d60ab55 [2021-11-23 01:52:15,124 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 01:52:15,127 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 01:52:15,129 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 01:52:15,129 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 01:52:15,134 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 01:52:15,135 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:52:15" (1/1) ... [2021-11-23 01:52:15,137 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44f8dfde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:15, skipping insertion in model container [2021-11-23 01:52:15,137 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:52:15" (1/1) ... [2021-11-23 01:52:15,146 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 01:52:15,196 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 01:52:15,411 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_501f5d3c-3674-4075-be10-6b03054429df/sv-benchmarks/c/heap-manipulation/dancing.i[938,951] [2021-11-23 01:52:15,555 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 01:52:15,573 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 01:52:15,602 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_501f5d3c-3674-4075-be10-6b03054429df/sv-benchmarks/c/heap-manipulation/dancing.i[938,951] [2021-11-23 01:52:15,672 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 01:52:15,714 INFO L208 MainTranslator]: Completed translation [2021-11-23 01:52:15,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:15 WrapperNode [2021-11-23 01:52:15,715 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 01:52:15,716 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 01:52:15,717 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 01:52:15,717 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 01:52:15,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:15" (1/1) ... [2021-11-23 01:52:15,752 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:15" (1/1) ... [2021-11-23 01:52:15,785 INFO L137 Inliner]: procedures = 124, calls = 40, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 90 [2021-11-23 01:52:15,786 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 01:52:15,787 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 01:52:15,787 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 01:52:15,788 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 01:52:15,799 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:15" (1/1) ... [2021-11-23 01:52:15,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:15" (1/1) ... [2021-11-23 01:52:15,809 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:15" (1/1) ... [2021-11-23 01:52:15,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:15" (1/1) ... [2021-11-23 01:52:15,848 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:15" (1/1) ... [2021-11-23 01:52:15,854 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:15" (1/1) ... [2021-11-23 01:52:15,859 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:15" (1/1) ... [2021-11-23 01:52:15,875 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 01:52:15,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 01:52:15,877 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 01:52:15,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 01:52:15,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:15" (1/1) ... [2021-11-23 01:52:15,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 01:52:15,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:52:15,930 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 01:52:15,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 01:52:15,998 INFO L130 BoogieDeclarations]: Found specification of procedure is_list_containing_x [2021-11-23 01:52:15,998 INFO L138 BoogieDeclarations]: Found implementation of procedure is_list_containing_x [2021-11-23 01:52:15,998 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-23 01:52:15,999 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-23 01:52:15,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 01:52:15,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 01:52:15,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 01:52:15,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 01:52:16,000 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 01:52:16,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 01:52:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 01:52:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 01:52:16,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 01:52:16,153 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 01:52:16,155 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 01:52:16,613 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 01:52:16,673 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 01:52:16,686 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 01:52:16,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:52:16 BoogieIcfgContainer [2021-11-23 01:52:16,689 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 01:52:16,691 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 01:52:16,696 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 01:52:16,700 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 01:52:16,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:52:15" (1/3) ... [2021-11-23 01:52:16,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10be78e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:52:16, skipping insertion in model container [2021-11-23 01:52:16,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:15" (2/3) ... [2021-11-23 01:52:16,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10be78e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:52:16, skipping insertion in model container [2021-11-23 01:52:16,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:52:16" (3/3) ... [2021-11-23 01:52:16,704 INFO L111 eAbstractionObserver]: Analyzing ICFG dancing.i [2021-11-23 01:52:16,710 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 01:52:16,710 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2021-11-23 01:52:16,779 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 01:52:16,795 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 01:52:16,795 INFO L340 AbstractCegarLoop]: Starting to check reachability of 44 error locations. [2021-11-23 01:52:16,823 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 45 states have (on average 2.2) internal successors, (99), 89 states have internal predecessors, (99), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 01:52:16,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-11-23 01:52:16,841 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:52:16,842 INFO L514 BasicCegarLoop]: trace histogram [1, 1] [2021-11-23 01:52:16,842 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-23 01:52:16,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:52:16,856 INFO L85 PathProgramCache]: Analyzing trace with hash 6700, now seen corresponding path program 1 times [2021-11-23 01:52:16,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:52:16,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687765787] [2021-11-23 01:52:16,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:16,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:52:17,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:17,149 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 01:52:17,149 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:52:17,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687765787] [2021-11-23 01:52:17,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687765787] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:52:17,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:52:17,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-23 01:52:17,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415722301] [2021-11-23 01:52:17,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:52:17,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:52:17,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:52:17,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:52:17,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:52:17,216 INFO L87 Difference]: Start difference. First operand has 98 states, 45 states have (on average 2.2) internal successors, (99), 89 states have internal predecessors, (99), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 01:52:17,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:52:17,427 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2021-11-23 01:52:17,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:52:17,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2021-11-23 01:52:17,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:52:17,443 INFO L225 Difference]: With dead ends: 96 [2021-11-23 01:52:17,444 INFO L226 Difference]: Without dead ends: 95 [2021-11-23 01:52:17,446 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 01:52:17,452 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 73 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:52:17,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 79 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:52:17,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-23 01:52:17,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-11-23 01:52:17,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 45 states have (on average 2.111111111111111) internal successors, (95), 86 states have internal predecessors, (95), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 01:52:17,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2021-11-23 01:52:17,523 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 2 [2021-11-23 01:52:17,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:52:17,524 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2021-11-23 01:52:17,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 01:52:17,524 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2021-11-23 01:52:17,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-11-23 01:52:17,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:52:17,525 INFO L514 BasicCegarLoop]: trace histogram [1, 1] [2021-11-23 01:52:17,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 01:52:17,526 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-23 01:52:17,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:52:17,530 INFO L85 PathProgramCache]: Analyzing trace with hash 6701, now seen corresponding path program 1 times [2021-11-23 01:52:17,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:52:17,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301780373] [2021-11-23 01:52:17,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:17,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:52:17,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:17,618 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 01:52:17,619 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:52:17,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301780373] [2021-11-23 01:52:17,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301780373] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:52:17,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:52:17,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-23 01:52:17,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706196538] [2021-11-23 01:52:17,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:52:17,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:52:17,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:52:17,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:52:17,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:52:17,632 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 01:52:17,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:52:17,777 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2021-11-23 01:52:17,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:52:17,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2021-11-23 01:52:17,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:52:17,779 INFO L225 Difference]: With dead ends: 93 [2021-11-23 01:52:17,780 INFO L226 Difference]: Without dead ends: 93 [2021-11-23 01:52:17,780 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 01:52:17,782 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 71 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:52:17,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 80 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:52:17,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-23 01:52:17,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-11-23 01:52:17,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 45 states have (on average 2.066666666666667) internal successors, (93), 84 states have internal predecessors, (93), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 01:52:17,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2021-11-23 01:52:17,796 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 2 [2021-11-23 01:52:17,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:52:17,797 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2021-11-23 01:52:17,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 01:52:17,797 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2021-11-23 01:52:17,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 01:52:17,798 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:52:17,798 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 01:52:17,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 01:52:17,799 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-23 01:52:17,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:52:17,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1897110090, now seen corresponding path program 1 times [2021-11-23 01:52:17,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:52:17,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552225796] [2021-11-23 01:52:17,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:17,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:52:17,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:17,886 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 01:52:17,887 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:52:17,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552225796] [2021-11-23 01:52:17,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552225796] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:52:17,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:52:17,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 01:52:17,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856407186] [2021-11-23 01:52:17,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:52:17,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:52:17,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:52:17,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:52:17,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:52:17,892 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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 01:52:18,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:52:18,092 INFO L93 Difference]: Finished difference Result 150 states and 173 transitions. [2021-11-23 01:52:18,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:52:18,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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 01:52:18,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:52:18,101 INFO L225 Difference]: With dead ends: 150 [2021-11-23 01:52:18,101 INFO L226 Difference]: Without dead ends: 150 [2021-11-23 01:52:18,102 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 01:52:18,111 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 66 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:52:18,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 179 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:52:18,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-23 01:52:18,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 91. [2021-11-23 01:52:18,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 45 states have (on average 2.022222222222222) internal successors, (91), 82 states have internal predecessors, (91), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 01:52:18,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2021-11-23 01:52:18,146 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 6 [2021-11-23 01:52:18,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:52:18,147 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2021-11-23 01:52:18,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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 01:52:18,148 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2021-11-23 01:52:18,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 01:52:18,148 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:52:18,149 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 01:52:18,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 01:52:18,150 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-23 01:52:18,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:52:18,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1897110091, now seen corresponding path program 1 times [2021-11-23 01:52:18,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:52:18,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986673428] [2021-11-23 01:52:18,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:18,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:52:18,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:18,233 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 01:52:18,234 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:52:18,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986673428] [2021-11-23 01:52:18,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986673428] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:52:18,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:52:18,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 01:52:18,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709504456] [2021-11-23 01:52:18,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:52:18,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:52:18,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:52:18,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:52:18,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:52:18,240 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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 01:52:18,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:52:18,422 INFO L93 Difference]: Finished difference Result 150 states and 172 transitions. [2021-11-23 01:52:18,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:52:18,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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 01:52:18,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:52:18,425 INFO L225 Difference]: With dead ends: 150 [2021-11-23 01:52:18,425 INFO L226 Difference]: Without dead ends: 150 [2021-11-23 01:52:18,426 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 01:52:18,438 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 66 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:52:18,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 183 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:52:18,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-23 01:52:18,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 89. [2021-11-23 01:52:18,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 80 states have internal predecessors, (89), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 01:52:18,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2021-11-23 01:52:18,460 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 6 [2021-11-23 01:52:18,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:52:18,460 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2021-11-23 01:52:18,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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 01:52:18,461 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2021-11-23 01:52:18,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 01:52:18,462 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:52:18,462 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:52:18,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 01:52:18,462 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting is_list_containing_xErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-23 01:52:18,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:52:18,463 INFO L85 PathProgramCache]: Analyzing trace with hash -2076841129, now seen corresponding path program 1 times [2021-11-23 01:52:18,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:52:18,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170214040] [2021-11-23 01:52:18,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:18,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:52:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:18,606 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 01:52:18,606 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:52:18,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170214040] [2021-11-23 01:52:18,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170214040] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:52:18,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:52:18,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 01:52:18,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877549681] [2021-11-23 01:52:18,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:52:18,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 01:52:18,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:52:18,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 01:52:18,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:52:18,610 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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 01:52:18,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:52:18,741 INFO L93 Difference]: Finished difference Result 160 states and 186 transitions. [2021-11-23 01:52:18,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 01:52:18,742 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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 8 [2021-11-23 01:52:18,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:52:18,745 INFO L225 Difference]: With dead ends: 160 [2021-11-23 01:52:18,745 INFO L226 Difference]: Without dead ends: 160 [2021-11-23 01:52:18,746 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 01:52:18,747 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 70 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:52:18,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 346 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:52:18,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-23 01:52:18,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 123. [2021-11-23 01:52:18,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 74 states have (on average 2.0675675675675675) internal successors, (153), 110 states have internal predecessors, (153), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-23 01:52:18,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 173 transitions. [2021-11-23 01:52:18,774 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 173 transitions. Word has length 8 [2021-11-23 01:52:18,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:52:18,774 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 173 transitions. [2021-11-23 01:52:18,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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 01:52:18,775 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 173 transitions. [2021-11-23 01:52:18,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 01:52:18,775 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:52:18,776 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:52:18,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 01:52:18,776 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-23 01:52:18,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:52:18,777 INFO L85 PathProgramCache]: Analyzing trace with hash 2056662894, now seen corresponding path program 1 times [2021-11-23 01:52:18,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:52:18,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449248451] [2021-11-23 01:52:18,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:18,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:52:18,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:18,880 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 01:52:18,880 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:52:18,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449248451] [2021-11-23 01:52:18,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449248451] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:52:18,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:52:18,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 01:52:18,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457720504] [2021-11-23 01:52:18,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:52:18,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 01:52:18,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:52:18,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 01:52:18,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 01:52:18,883 INFO L87 Difference]: Start difference. First operand 123 states and 173 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:52:19,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:52:19,033 INFO L93 Difference]: Finished difference Result 122 states and 172 transitions. [2021-11-23 01:52:19,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 01:52:19,033 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-23 01:52:19,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:52:19,035 INFO L225 Difference]: With dead ends: 122 [2021-11-23 01:52:19,035 INFO L226 Difference]: Without dead ends: 122 [2021-11-23 01:52:19,036 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 01:52:19,037 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 127 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:52:19,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 93 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:52:19,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-23 01:52:19,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-11-23 01:52:19,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 74 states have (on average 2.054054054054054) internal successors, (152), 109 states have internal predecessors, (152), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-23 01:52:19,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 172 transitions. [2021-11-23 01:52:19,048 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 172 transitions. Word has length 8 [2021-11-23 01:52:19,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:52:19,049 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 172 transitions. [2021-11-23 01:52:19,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:52:19,049 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 172 transitions. [2021-11-23 01:52:19,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 01:52:19,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:52:19,050 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:52:19,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 01:52:19,050 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-23 01:52:19,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:52:19,051 INFO L85 PathProgramCache]: Analyzing trace with hash 2056662893, now seen corresponding path program 1 times [2021-11-23 01:52:19,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:52:19,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993289213] [2021-11-23 01:52:19,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:19,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:52:19,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:19,132 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 01:52:19,132 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:52:19,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993289213] [2021-11-23 01:52:19,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993289213] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:52:19,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:52:19,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 01:52:19,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320236424] [2021-11-23 01:52:19,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:52:19,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 01:52:19,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:52:19,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 01:52:19,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:52:19,135 INFO L87 Difference]: Start difference. First operand 122 states and 172 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:52:19,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:52:19,264 INFO L93 Difference]: Finished difference Result 121 states and 171 transitions. [2021-11-23 01:52:19,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 01:52:19,264 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-23 01:52:19,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:52:19,266 INFO L225 Difference]: With dead ends: 121 [2021-11-23 01:52:19,266 INFO L226 Difference]: Without dead ends: 121 [2021-11-23 01:52:19,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 01:52:19,267 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 187 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:52:19,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 92 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:52:19,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-23 01:52:19,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-11-23 01:52:19,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 108 states have internal predecessors, (151), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-23 01:52:19,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 171 transitions. [2021-11-23 01:52:19,277 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 171 transitions. Word has length 8 [2021-11-23 01:52:19,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:52:19,277 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 171 transitions. [2021-11-23 01:52:19,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:52:19,278 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 171 transitions. [2021-11-23 01:52:19,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 01:52:19,279 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:52:19,279 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:52:19,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 01:52:19,279 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-23 01:52:19,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:52:19,280 INFO L85 PathProgramCache]: Analyzing trace with hash 2124365722, now seen corresponding path program 1 times [2021-11-23 01:52:19,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:52:19,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974242085] [2021-11-23 01:52:19,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:19,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:52:19,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:19,341 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 01:52:19,341 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:52:19,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974242085] [2021-11-23 01:52:19,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974242085] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:52:19,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:52:19,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 01:52:19,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410093073] [2021-11-23 01:52:19,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:52:19,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 01:52:19,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:52:19,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 01:52:19,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:52:19,343 INFO L87 Difference]: Start difference. First operand 121 states and 171 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 01:52:19,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:52:19,608 INFO L93 Difference]: Finished difference Result 143 states and 166 transitions. [2021-11-23 01:52:19,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 01:52:19,608 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-23 01:52:19,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:52:19,610 INFO L225 Difference]: With dead ends: 143 [2021-11-23 01:52:19,610 INFO L226 Difference]: Without dead ends: 143 [2021-11-23 01:52:19,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 01:52:19,612 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 322 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:52:19,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 132 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:52:19,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-23 01:52:19,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 116. [2021-11-23 01:52:19,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 74 states have (on average 1.8918918918918919) internal successors, (140), 103 states have internal predecessors, (140), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-23 01:52:19,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 160 transitions. [2021-11-23 01:52:19,620 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 160 transitions. Word has length 11 [2021-11-23 01:52:19,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:52:19,620 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 160 transitions. [2021-11-23 01:52:19,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 01:52:19,620 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 160 transitions. [2021-11-23 01:52:19,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 01:52:19,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:52:19,621 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:52:19,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 01:52:19,622 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-23 01:52:19,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:52:19,622 INFO L85 PathProgramCache]: Analyzing trace with hash 2124365723, now seen corresponding path program 1 times [2021-11-23 01:52:19,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:52:19,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218535139] [2021-11-23 01:52:19,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:19,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:52:19,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:19,732 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 01:52:19,733 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:52:19,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218535139] [2021-11-23 01:52:19,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218535139] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:52:19,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:52:19,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 01:52:19,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545282056] [2021-11-23 01:52:19,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:52:19,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 01:52:19,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:52:19,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 01:52:19,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:52:19,735 INFO L87 Difference]: Start difference. First operand 116 states and 160 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 01:52:20,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:52:20,041 INFO L93 Difference]: Finished difference Result 139 states and 161 transitions. [2021-11-23 01:52:20,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 01:52:20,042 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-23 01:52:20,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:52:20,044 INFO L225 Difference]: With dead ends: 139 [2021-11-23 01:52:20,044 INFO L226 Difference]: Without dead ends: 139 [2021-11-23 01:52:20,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 01:52:20,045 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 204 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 01:52:20,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 180 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 01:52:20,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-23 01:52:20,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 116. [2021-11-23 01:52:20,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 74 states have (on average 1.8108108108108107) internal successors, (134), 103 states have internal predecessors, (134), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-23 01:52:20,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 154 transitions. [2021-11-23 01:52:20,052 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 154 transitions. Word has length 11 [2021-11-23 01:52:20,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:52:20,053 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 154 transitions. [2021-11-23 01:52:20,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 01:52:20,053 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 154 transitions. [2021-11-23 01:52:20,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 01:52:20,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:52:20,054 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:52:20,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 01:52:20,054 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting is_list_containing_xErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-23 01:52:20,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:52:20,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1159058315, now seen corresponding path program 1 times [2021-11-23 01:52:20,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:52:20,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529488085] [2021-11-23 01:52:20,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:20,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:52:20,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:20,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:52:20,130 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:52:20,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529488085] [2021-11-23 01:52:20,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529488085] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:52:20,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137751899] [2021-11-23 01:52:20,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:20,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:52:20,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:52:20,135 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:52:20,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 01:52:20,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:20,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 01:52:20,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:52:20,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 01:52:20,347 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 01:52:20,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-23 01:52:20,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:52:20,662 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:52:20,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137751899] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:52:20,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 01:52:20,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-11-23 01:52:20,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734041710] [2021-11-23 01:52:20,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:52:20,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 01:52:20,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:52:20,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 01:52:20,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-23 01:52:20,666 INFO L87 Difference]: Start difference. First operand 116 states and 154 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 01:52:20,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:52:20,790 INFO L93 Difference]: Finished difference Result 167 states and 217 transitions. [2021-11-23 01:52:20,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 01:52:20,791 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 13 [2021-11-23 01:52:20,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:52:20,794 INFO L225 Difference]: With dead ends: 167 [2021-11-23 01:52:20,794 INFO L226 Difference]: Without dead ends: 167 [2021-11-23 01:52:20,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-23 01:52:20,796 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 49 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:52:20,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 267 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 182 Unchecked, 0.1s Time] [2021-11-23 01:52:20,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-23 01:52:20,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 119. [2021-11-23 01:52:20,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 77 states have (on average 1.8051948051948052) internal successors, (139), 105 states have internal predecessors, (139), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-23 01:52:20,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 159 transitions. [2021-11-23 01:52:20,808 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 159 transitions. Word has length 13 [2021-11-23 01:52:20,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:52:20,809 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 159 transitions. [2021-11-23 01:52:20,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 01:52:20,810 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 159 transitions. [2021-11-23 01:52:20,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 01:52:20,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:52:20,814 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:52:20,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 01:52:21,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 01:52:21,030 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting is_list_containing_xErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-23 01:52:21,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:52:21,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1159058314, now seen corresponding path program 1 times [2021-11-23 01:52:21,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:52:21,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161461600] [2021-11-23 01:52:21,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:21,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:52:21,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:21,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:52:21,180 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:52:21,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161461600] [2021-11-23 01:52:21,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161461600] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:52:21,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831389981] [2021-11-23 01:52:21,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:21,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:52:21,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:52:21,182 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:52:21,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 01:52:21,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:21,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 01:52:21,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:52:21,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 01:52:21,349 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 01:52:21,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-11-23 01:52:21,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 01:52:21,527 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:52:21,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831389981] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:52:21,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 01:52:21,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2021-11-23 01:52:21,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103010773] [2021-11-23 01:52:21,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:52:21,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 01:52:21,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:52:21,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 01:52:21,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-23 01:52:21,530 INFO L87 Difference]: Start difference. First operand 119 states and 159 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 01:52:21,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:52:21,744 INFO L93 Difference]: Finished difference Result 130 states and 171 transitions. [2021-11-23 01:52:21,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 01:52:21,745 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 13 [2021-11-23 01:52:21,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:52:21,746 INFO L225 Difference]: With dead ends: 130 [2021-11-23 01:52:21,747 INFO L226 Difference]: Without dead ends: 130 [2021-11-23 01:52:21,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-23 01:52:21,748 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 133 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:52:21,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 133 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:52:21,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-23 01:52:21,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2021-11-23 01:52:21,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 84 states have (on average 1.7738095238095237) internal successors, (149), 112 states have internal predecessors, (149), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-23 01:52:21,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 171 transitions. [2021-11-23 01:52:21,760 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 171 transitions. Word has length 13 [2021-11-23 01:52:21,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:52:21,760 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 171 transitions. [2021-11-23 01:52:21,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 01:52:21,761 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 171 transitions. [2021-11-23 01:52:21,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 01:52:21,763 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:52:21,764 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:52:21,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 01:52:21,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:52:21,990 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting is_list_containing_xErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-23 01:52:21,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:52:21,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1458507210, now seen corresponding path program 1 times [2021-11-23 01:52:21,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:52:21,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569741111] [2021-11-23 01:52:21,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:21,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:52:22,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:22,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 01:52:22,054 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:52:22,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569741111] [2021-11-23 01:52:22,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569741111] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:52:22,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:52:22,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 01:52:22,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843730708] [2021-11-23 01:52:22,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:52:22,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:52:22,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:52:22,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:52:22,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:52:22,057 INFO L87 Difference]: Start difference. First operand 128 states and 171 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 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 01:52:22,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:52:22,141 INFO L93 Difference]: Finished difference Result 131 states and 176 transitions. [2021-11-23 01:52:22,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:52:22,142 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 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 15 [2021-11-23 01:52:22,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:52:22,144 INFO L225 Difference]: With dead ends: 131 [2021-11-23 01:52:22,145 INFO L226 Difference]: Without dead ends: 131 [2021-11-23 01:52:22,145 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 01:52:22,146 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 5 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:52:22,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 133 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:52:22,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-23 01:52:22,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2021-11-23 01:52:22,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 84 states have (on average 1.75) internal successors, (147), 111 states have internal predecessors, (147), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-23 01:52:22,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 169 transitions. [2021-11-23 01:52:22,163 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 169 transitions. Word has length 15 [2021-11-23 01:52:22,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:52:22,163 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 169 transitions. [2021-11-23 01:52:22,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 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 01:52:22,164 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 169 transitions. [2021-11-23 01:52:22,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 01:52:22,167 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:52:22,167 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:52:22,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 01:52:22,168 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-23 01:52:22,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:52:22,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1754391202, now seen corresponding path program 1 times [2021-11-23 01:52:22,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:52:22,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459968486] [2021-11-23 01:52:22,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:22,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:52:22,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:22,311 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 01:52:22,312 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:52:22,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459968486] [2021-11-23 01:52:22,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459968486] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:52:22,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:52:22,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 01:52:22,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770950864] [2021-11-23 01:52:22,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:52:22,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 01:52:22,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:52:22,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 01:52:22,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:52:22,315 INFO L87 Difference]: Start difference. First operand 127 states and 169 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 01:52:22,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:52:22,522 INFO L93 Difference]: Finished difference Result 159 states and 202 transitions. [2021-11-23 01:52:22,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 01:52:22,523 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-23 01:52:22,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:52:22,525 INFO L225 Difference]: With dead ends: 159 [2021-11-23 01:52:22,525 INFO L226 Difference]: Without dead ends: 159 [2021-11-23 01:52:22,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-23 01:52:22,526 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 113 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:52:22,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 281 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:52:22,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-23 01:52:22,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 124. [2021-11-23 01:52:22,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 81 states have (on average 1.7407407407407407) internal successors, (141), 108 states have internal predecessors, (141), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-23 01:52:22,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 163 transitions. [2021-11-23 01:52:22,539 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 163 transitions. Word has length 15 [2021-11-23 01:52:22,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:52:22,540 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 163 transitions. [2021-11-23 01:52:22,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 01:52:22,540 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 163 transitions. [2021-11-23 01:52:22,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 01:52:22,541 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:52:22,541 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:52:22,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 01:52:22,542 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-23 01:52:22,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:52:22,542 INFO L85 PathProgramCache]: Analyzing trace with hash 2030371260, now seen corresponding path program 1 times [2021-11-23 01:52:22,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:52:22,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413366929] [2021-11-23 01:52:22,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:22,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:52:22,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:22,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:52:22,615 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:52:22,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413366929] [2021-11-23 01:52:22,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413366929] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:52:22,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023578177] [2021-11-23 01:52:22,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:22,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:52:22,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:52:22,618 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:52:22,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 01:52:22,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:22,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 01:52:22,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:52:22,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:52:22,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:52:22,986 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 01:52:22,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2021-11-23 01:52:23,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:52:23,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023578177] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:52:23,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [906998368] [2021-11-23 01:52:23,041 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-23 01:52:23,042 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:52:23,051 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:52:23,059 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:52:23,059 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:52:23,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-23 01:52:23,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 01:52:23,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 01:52:23,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-23 01:52:23,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 01:52:23,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 01:52:23,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-23 01:52:23,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-23 01:52:23,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-23 01:52:23,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-23 01:52:23,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-23 01:52:23,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-23 01:52:23,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-23 01:52:23,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-23 01:52:23,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:23,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 45 [2021-11-23 01:52:23,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:23,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 45 [2021-11-23 01:52:23,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-23 01:52:23,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 49 [2021-11-23 01:52:23,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:23,956 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-23 01:52:23,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 215 treesize of output 160 [2021-11-23 01:52:23,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:23,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:23,996 INFO L354 Elim1Store]: treesize reduction 63, result has 17.1 percent of original size [2021-11-23 01:52:23,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 219 [2021-11-23 01:52:24,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:24,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-23 01:52:24,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:52:24,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:52:24,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-23 01:52:24,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:24,170 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 01:52:24,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-23 01:52:24,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-23 01:52:24,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:24,235 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-23 01:52:24,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 01:52:24,319 INFO L354 Elim1Store]: treesize reduction 32, result has 58.4 percent of original size [2021-11-23 01:52:24,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 66 [2021-11-23 01:52:24,454 INFO L354 Elim1Store]: treesize reduction 68, result has 31.3 percent of original size [2021-11-23 01:52:24,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 45 [2021-11-23 01:52:24,523 INFO L354 Elim1Store]: treesize reduction 71, result has 17.4 percent of original size [2021-11-23 01:52:24,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 204 treesize of output 161 [2021-11-23 01:52:24,551 INFO L354 Elim1Store]: treesize reduction 63, result has 17.1 percent of original size [2021-11-23 01:52:24,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 200 treesize of output 175 [2021-11-23 01:52:24,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-23 01:52:24,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-23 01:52:24,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:52:24,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:52:24,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-23 01:52:24,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:24,685 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 01:52:24,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-23 01:52:24,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:24,709 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-23 01:52:24,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 01:52:25,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 01:52:25,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-23 01:52:25,025 INFO L197 IcfgInterpreter]: Interpreting procedure is_list_containing_x with input of size 21 for LOIs [2021-11-23 01:52:25,038 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:52:26,074 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3589#(and (<= 0 |ULTIMATE.start_main_~tail~0#1.base|) (= |ULTIMATE.start_remove_#in~x#1.offset| |ULTIMATE.start_main_~x~0#1.offset|) (= |ULTIMATE.start_main_~#list~0#1.base| |ULTIMATE.start_main_~x~0#1.base|) (<= 0 |ULTIMATE.start_main_~tail~0#1.offset|) (= (mod (+ (* |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 255) 1) 256) 0) (<= 0 |ULTIMATE.start_main_~x~0#1.offset|) (= |ULTIMATE.start_remove_#in~x#1.base| |ULTIMATE.start_main_~x~0#1.base|) (< |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 256) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#list~0#1.base|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start_main_~#list~0#1.offset| 0) (= |ULTIMATE.start_main_~#list~0#1.offset| |ULTIMATE.start_main_~x~0#1.offset|) (= |ULTIMATE.start_remove_#in~x#1.offset| |ULTIMATE.start_remove_~x#1.offset|) (not (= (select |#valid| |ULTIMATE.start_remove_~x#1.base|) 1)) (= |ULTIMATE.start_remove_#in~x#1.base| |ULTIMATE.start_remove_~x#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= |ULTIMATE.start_main_~tail~0#1.offset| 0))' at error location [2021-11-23 01:52:26,074 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:52:26,074 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 01:52:26,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 12 [2021-11-23 01:52:26,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106175023] [2021-11-23 01:52:26,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 01:52:26,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 01:52:26,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:52:26,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 01:52:26,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-11-23 01:52:26,077 INFO L87 Difference]: Start difference. First operand 124 states and 163 transitions. Second operand has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 01:52:26,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:52:26,472 INFO L93 Difference]: Finished difference Result 228 states and 301 transitions. [2021-11-23 01:52:26,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 01:52:26,473 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 16 [2021-11-23 01:52:26,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:52:26,475 INFO L225 Difference]: With dead ends: 228 [2021-11-23 01:52:26,475 INFO L226 Difference]: Without dead ends: 228 [2021-11-23 01:52:26,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2021-11-23 01:52:26,477 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 199 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 01:52:26,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 322 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 393 Invalid, 0 Unknown, 25 Unchecked, 0.3s Time] [2021-11-23 01:52:26,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-11-23 01:52:26,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 134. [2021-11-23 01:52:26,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 88 states have (on average 1.6931818181818181) internal successors, (149), 116 states have internal predecessors, (149), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2021-11-23 01:52:26,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 174 transitions. [2021-11-23 01:52:26,485 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 174 transitions. Word has length 16 [2021-11-23 01:52:26,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:52:26,486 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 174 transitions. [2021-11-23 01:52:26,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 01:52:26,486 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 174 transitions. [2021-11-23 01:52:26,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 01:52:26,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:52:26,487 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:52:26,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 01:52:26,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:52:26,702 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-23 01:52:26,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:52:26,703 INFO L85 PathProgramCache]: Analyzing trace with hash 2030371261, now seen corresponding path program 1 times [2021-11-23 01:52:26,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:52:26,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476410427] [2021-11-23 01:52:26,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:26,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:52:26,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:26,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:52:26,819 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:52:26,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476410427] [2021-11-23 01:52:26,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476410427] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:52:26,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756157456] [2021-11-23 01:52:26,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:26,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:52:26,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:52:26,821 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:52:26,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 01:52:26,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:26,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-23 01:52:26,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:52:27,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:52:27,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:52:27,330 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 01:52:27,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2021-11-23 01:52:27,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:52:27,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756157456] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:52:27,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1303652927] [2021-11-23 01:52:27,460 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-23 01:52:27,460 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:52:27,460 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:52:27,461 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:52:27,461 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:52:27,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-23 01:52:27,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 01:52:27,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-23 01:52:27,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 01:52:27,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 01:52:27,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-23 01:52:27,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 01:52:27,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-23 01:52:27,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-23 01:52:27,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-23 01:52:27,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-23 01:52:27,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-23 01:52:27,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-23 01:52:27,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-23 01:52:27,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:27,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 45 [2021-11-23 01:52:27,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-23 01:52:27,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:27,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 45 [2021-11-23 01:52:27,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 49 [2021-11-23 01:52:27,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-23 01:52:27,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:27,972 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-23 01:52:27,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 215 treesize of output 160 [2021-11-23 01:52:27,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:27,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:27,999 INFO L354 Elim1Store]: treesize reduction 63, result has 17.1 percent of original size [2021-11-23 01:52:28,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 219 [2021-11-23 01:52:28,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-23 01:52:28,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:52:28,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:52:28,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-23 01:52:28,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:28,077 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 01:52:28,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-23 01:52:28,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:28,109 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-23 01:52:28,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 01:52:28,165 INFO L354 Elim1Store]: treesize reduction 68, result has 31.3 percent of original size [2021-11-23 01:52:28,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 45 [2021-11-23 01:52:28,187 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-23 01:52:28,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 38 [2021-11-23 01:52:28,229 INFO L354 Elim1Store]: treesize reduction 63, result has 17.1 percent of original size [2021-11-23 01:52:28,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 151 treesize of output 132 [2021-11-23 01:52:28,247 INFO L354 Elim1Store]: treesize reduction 71, result has 17.4 percent of original size [2021-11-23 01:52:28,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 147 treesize of output 116 [2021-11-23 01:52:28,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-23 01:52:28,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:52:28,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-23 01:52:28,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:52:28,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:28,323 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-23 01:52:28,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 01:52:28,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-23 01:52:28,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:28,347 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 01:52:28,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-23 01:52:28,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 01:52:28,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-23 01:52:28,554 INFO L197 IcfgInterpreter]: Interpreting procedure is_list_containing_x with input of size 21 for LOIs [2021-11-23 01:52:28,564 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:52:29,477 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4084#(and (<= 0 |ULTIMATE.start_main_~tail~0#1.base|) (= |ULTIMATE.start_remove_#in~x#1.offset| |ULTIMATE.start_main_~x~0#1.offset|) (= |ULTIMATE.start_main_~#list~0#1.base| |ULTIMATE.start_main_~x~0#1.base|) (<= 0 |ULTIMATE.start_main_~tail~0#1.offset|) (= (mod (+ (* |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 255) 1) 256) 0) (<= 0 |ULTIMATE.start_main_~x~0#1.offset|) (= |ULTIMATE.start_remove_#in~x#1.base| |ULTIMATE.start_main_~x~0#1.base|) (< (select |#length| |ULTIMATE.start_remove_~x#1.base|) (+ 8 |ULTIMATE.start_remove_~x#1.offset|)) (< |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 256) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#list~0#1.base|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start_main_~#list~0#1.offset| 0) (= |ULTIMATE.start_main_~#list~0#1.offset| |ULTIMATE.start_main_~x~0#1.offset|) (= |ULTIMATE.start_remove_#in~x#1.offset| |ULTIMATE.start_remove_~x#1.offset|) (= |ULTIMATE.start_remove_#in~x#1.base| |ULTIMATE.start_remove_~x#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= |ULTIMATE.start_main_~tail~0#1.offset| 0))' at error location [2021-11-23 01:52:29,478 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:52:29,478 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 01:52:29,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2021-11-23 01:52:29,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379487533] [2021-11-23 01:52:29,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 01:52:29,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 01:52:29,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:52:29,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 01:52:29,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-11-23 01:52:29,480 INFO L87 Difference]: Start difference. First operand 134 states and 174 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 01:52:30,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:52:30,220 INFO L93 Difference]: Finished difference Result 306 states and 413 transitions. [2021-11-23 01:52:30,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 01:52:30,221 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 16 [2021-11-23 01:52:30,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:52:30,224 INFO L225 Difference]: With dead ends: 306 [2021-11-23 01:52:30,224 INFO L226 Difference]: Without dead ends: 306 [2021-11-23 01:52:30,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=202, Invalid=1280, Unknown=0, NotChecked=0, Total=1482 [2021-11-23 01:52:30,226 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 478 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 01:52:30,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 616 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 715 Invalid, 0 Unknown, 130 Unchecked, 0.6s Time] [2021-11-23 01:52:30,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-11-23 01:52:30,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 142. [2021-11-23 01:52:30,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 97 states have (on average 1.6185567010309279) internal successors, (157), 122 states have internal predecessors, (157), 12 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2021-11-23 01:52:30,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 185 transitions. [2021-11-23 01:52:30,236 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 185 transitions. Word has length 16 [2021-11-23 01:52:30,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:52:30,236 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 185 transitions. [2021-11-23 01:52:30,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 01:52:30,237 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 185 transitions. [2021-11-23 01:52:30,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 01:52:30,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:52:30,238 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:52:30,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 01:52:30,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-23 01:52:30,450 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-23 01:52:30,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:52:30,451 INFO L85 PathProgramCache]: Analyzing trace with hash 472269758, now seen corresponding path program 1 times [2021-11-23 01:52:30,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:52:30,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607835960] [2021-11-23 01:52:30,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:30,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:52:30,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:30,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 01:52:30,476 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:52:30,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607835960] [2021-11-23 01:52:30,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607835960] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:52:30,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:52:30,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 01:52:30,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777195848] [2021-11-23 01:52:30,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:52:30,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:52:30,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:52:30,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:52:30,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:52:30,478 INFO L87 Difference]: Start difference. First operand 142 states and 185 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 01:52:30,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:52:30,509 INFO L93 Difference]: Finished difference Result 153 states and 177 transitions. [2021-11-23 01:52:30,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:52:30,510 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-23 01:52:30,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:52:30,511 INFO L225 Difference]: With dead ends: 153 [2021-11-23 01:52:30,511 INFO L226 Difference]: Without dead ends: 153 [2021-11-23 01:52:30,511 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 01:52:30,512 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 56 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 01:52:30,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 197 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 01:52:30,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-23 01:52:30,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 134. [2021-11-23 01:52:30,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 91 states have (on average 1.6153846153846154) internal successors, (147), 116 states have internal predecessors, (147), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2021-11-23 01:52:30,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 172 transitions. [2021-11-23 01:52:30,520 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 172 transitions. Word has length 17 [2021-11-23 01:52:30,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:52:30,521 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 172 transitions. [2021-11-23 01:52:30,521 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 01:52:30,521 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 172 transitions. [2021-11-23 01:52:30,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 01:52:30,524 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:52:30,524 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:52:30,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 01:52:30,525 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-23 01:52:30,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:52:30,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1986748576, now seen corresponding path program 1 times [2021-11-23 01:52:30,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:52:30,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150952890] [2021-11-23 01:52:30,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:30,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:52:30,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:30,613 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 01:52:30,614 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:52:30,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150952890] [2021-11-23 01:52:30,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150952890] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:52:30,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:52:30,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 01:52:30,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334126417] [2021-11-23 01:52:30,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:52:30,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 01:52:30,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:52:30,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 01:52:30,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 01:52:30,617 INFO L87 Difference]: Start difference. First operand 134 states and 172 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 01:52:30,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:52:30,817 INFO L93 Difference]: Finished difference Result 155 states and 186 transitions. [2021-11-23 01:52:30,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 01:52:30,818 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-23 01:52:30,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:52:30,819 INFO L225 Difference]: With dead ends: 155 [2021-11-23 01:52:30,819 INFO L226 Difference]: Without dead ends: 155 [2021-11-23 01:52:30,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-23 01:52:30,820 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 127 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:52:30,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 324 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:52:30,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-23 01:52:30,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 131. [2021-11-23 01:52:30,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 88 states have (on average 1.6022727272727273) internal successors, (141), 113 states have internal predecessors, (141), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2021-11-23 01:52:30,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 166 transitions. [2021-11-23 01:52:30,828 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 166 transitions. Word has length 17 [2021-11-23 01:52:30,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:52:30,829 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 166 transitions. [2021-11-23 01:52:30,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 01:52:30,829 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 166 transitions. [2021-11-23 01:52:30,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 01:52:30,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:52:30,830 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:52:30,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 01:52:30,831 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting is_list_containing_xErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-23 01:52:30,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:52:30,831 INFO L85 PathProgramCache]: Analyzing trace with hash -158970448, now seen corresponding path program 1 times [2021-11-23 01:52:30,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:52:30,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556125586] [2021-11-23 01:52:30,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:30,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:52:30,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:31,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:52:31,231 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:52:31,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556125586] [2021-11-23 01:52:31,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556125586] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:52:31,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011698912] [2021-11-23 01:52:31,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:31,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:52:31,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:52:31,238 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:52:31,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 01:52:31,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:31,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 01:52:31,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:52:31,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 01:52:31,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-23 01:52:31,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-11-23 01:52:31,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:52:31,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:52:31,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2021-11-23 01:52:31,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:52:31,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011698912] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:52:31,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1276791418] [2021-11-23 01:52:31,696 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-23 01:52:31,696 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:52:31,697 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 01:52:31,710 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 01:52:31,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 23 [2021-11-23 01:52:31,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481408502] [2021-11-23 01:52:31,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 01:52:31,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-23 01:52:31,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:52:31,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-23 01:52:31,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-11-23 01:52:31,713 INFO L87 Difference]: Start difference. First operand 131 states and 166 transitions. Second operand has 23 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 19 states have internal predecessors, (39), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:52:33,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:52:33,685 INFO L93 Difference]: Finished difference Result 295 states and 351 transitions. [2021-11-23 01:52:33,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-23 01:52:33,686 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 19 states have internal predecessors, (39), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-23 01:52:33,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:52:33,688 INFO L225 Difference]: With dead ends: 295 [2021-11-23 01:52:33,688 INFO L226 Difference]: Without dead ends: 295 [2021-11-23 01:52:33,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=245, Invalid=1735, Unknown=0, NotChecked=0, Total=1980 [2021-11-23 01:52:33,690 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 577 mSDsluCounter, 1301 mSDsCounter, 0 mSdLazyCounter, 1858 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 1361 SdHoareTripleChecker+Invalid, 2090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:52:33,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [584 Valid, 1361 Invalid, 2090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1858 Invalid, 0 Unknown, 71 Unchecked, 1.2s Time] [2021-11-23 01:52:33,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-11-23 01:52:33,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 210. [2021-11-23 01:52:33,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 151 states have (on average 1.5695364238410596) internal successors, (237), 178 states have internal predecessors, (237), 21 states have call successors, (21), 11 states have call predecessors, (21), 13 states have return successors, (27), 20 states have call predecessors, (27), 21 states have call successors, (27) [2021-11-23 01:52:33,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 285 transitions. [2021-11-23 01:52:33,701 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 285 transitions. Word has length 19 [2021-11-23 01:52:33,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:52:33,701 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 285 transitions. [2021-11-23 01:52:33,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 19 states have internal predecessors, (39), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:52:33,701 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 285 transitions. [2021-11-23 01:52:33,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 01:52:33,702 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:52:33,702 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:52:33,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 01:52:33,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 01:52:33,926 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-23 01:52:33,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:52:33,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1801700008, now seen corresponding path program 1 times [2021-11-23 01:52:33,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:52:33,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406356158] [2021-11-23 01:52:33,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:33,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:52:33,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:34,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:52:34,028 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:52:34,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406356158] [2021-11-23 01:52:34,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406356158] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:52:34,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636176847] [2021-11-23 01:52:34,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:34,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:52:34,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:52:34,030 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:52:34,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 01:52:34,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:34,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-23 01:52:34,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:52:34,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 01:52:34,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:52:34,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:52:34,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-11-23 01:52:34,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:52:34,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636176847] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:52:34,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [878859162] [2021-11-23 01:52:34,775 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-23 01:52:34,775 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:52:34,776 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:52:34,776 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:52:34,777 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:52:34,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:34,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:34,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-23 01:52:34,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 01:52:34,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:34,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-23 01:52:34,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 01:52:34,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:34,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 01:52:34,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:34,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 01:52:34,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:34,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-23 01:52:34,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:34,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:34,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:34,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:34,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:34,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-23 01:52:34,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:34,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:34,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-23 01:52:34,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:34,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:34,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-23 01:52:34,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:34,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-23 01:52:35,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:35,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-23 01:52:35,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:35,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:35,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:35,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-23 01:52:35,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:35,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:35,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:35,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-23 01:52:35,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:35,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-23 01:52:35,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:35,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:35,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:35,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:35,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:35,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 45 [2021-11-23 01:52:35,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:35,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:35,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:35,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:35,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:35,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 45 [2021-11-23 01:52:35,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:35,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:35,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:35,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:35,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:35,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:35,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:35,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:35,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:35,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 60 [2021-11-23 01:52:35,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:35,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-23 01:52:35,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:35,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:35,261 INFO L354 Elim1Store]: treesize reduction 192, result has 13.1 percent of original size [2021-11-23 01:52:35,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 249 treesize of output 194 [2021-11-23 01:52:35,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:35,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:35,307 INFO L354 Elim1Store]: treesize reduction 168, result has 13.8 percent of original size [2021-11-23 01:52:35,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 245 treesize of output 229 [2021-11-23 01:52:35,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:52:35,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:52:35,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-23 01:52:35,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:35,382 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 01:52:35,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-23 01:52:35,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:35,413 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-23 01:52:35,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 01:52:35,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-23 01:52:35,494 INFO L354 Elim1Store]: treesize reduction 32, result has 58.4 percent of original size [2021-11-23 01:52:35,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 66 [2021-11-23 01:52:35,589 INFO L354 Elim1Store]: treesize reduction 68, result has 31.3 percent of original size [2021-11-23 01:52:35,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 45 [2021-11-23 01:52:35,641 INFO L354 Elim1Store]: treesize reduction 71, result has 17.4 percent of original size [2021-11-23 01:52:35,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 204 treesize of output 161 [2021-11-23 01:52:35,660 INFO L354 Elim1Store]: treesize reduction 63, result has 17.1 percent of original size [2021-11-23 01:52:35,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 200 treesize of output 175 [2021-11-23 01:52:35,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-23 01:52:35,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:52:35,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-23 01:52:35,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:52:35,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-23 01:52:35,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:35,748 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-23 01:52:35,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 01:52:35,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:35,789 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 01:52:35,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-23 01:52:35,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-23 01:52:35,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 01:52:35,979 INFO L197 IcfgInterpreter]: Interpreting procedure is_list_containing_x with input of size 21 for LOIs [2021-11-23 01:52:36,000 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:52:36,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [878859162] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:52:36,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 01:52:36,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [8, 9, 8] total 31 [2021-11-23 01:52:36,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941566865] [2021-11-23 01:52:36,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:52:36,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 01:52:36,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:52:36,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 01:52:36,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2021-11-23 01:52:36,638 INFO L87 Difference]: Start difference. First operand 210 states and 285 transitions. Second operand has 14 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 11 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 01:52:37,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:52:37,781 INFO L93 Difference]: Finished difference Result 249 states and 319 transitions. [2021-11-23 01:52:37,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 01:52:37,781 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 11 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-11-23 01:52:37,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:52:37,783 INFO L225 Difference]: With dead ends: 249 [2021-11-23 01:52:37,783 INFO L226 Difference]: Without dead ends: 247 [2021-11-23 01:52:37,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2021-11-23 01:52:37,785 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 243 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 01:52:37,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 277 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 01:52:37,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-11-23 01:52:37,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 210. [2021-11-23 01:52:37,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 151 states have (on average 1.5695364238410596) internal successors, (237), 178 states have internal predecessors, (237), 21 states have call successors, (21), 11 states have call predecessors, (21), 13 states have return successors, (27), 20 states have call predecessors, (27), 21 states have call successors, (27) [2021-11-23 01:52:37,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 285 transitions. [2021-11-23 01:52:37,809 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 285 transitions. Word has length 18 [2021-11-23 01:52:37,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:52:37,811 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 285 transitions. [2021-11-23 01:52:37,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 11 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 01:52:37,812 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 285 transitions. [2021-11-23 01:52:37,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 01:52:37,813 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:52:37,814 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 01:52:37,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 01:52:38,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:52:38,034 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-23 01:52:38,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:52:38,035 INFO L85 PathProgramCache]: Analyzing trace with hash -130356238, now seen corresponding path program 1 times [2021-11-23 01:52:38,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:52:38,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489913536] [2021-11-23 01:52:38,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:38,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:52:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:38,098 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 01:52:38,099 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:52:38,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489913536] [2021-11-23 01:52:38,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489913536] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:52:38,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:52:38,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 01:52:38,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706774774] [2021-11-23 01:52:38,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:52:38,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 01:52:38,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:52:38,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 01:52:38,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:52:38,101 INFO L87 Difference]: Start difference. First operand 210 states and 285 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 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 01:52:38,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:52:38,150 INFO L93 Difference]: Finished difference Result 222 states and 300 transitions. [2021-11-23 01:52:38,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 01:52:38,152 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 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 01:52:38,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:52:38,154 INFO L225 Difference]: With dead ends: 222 [2021-11-23 01:52:38,154 INFO L226 Difference]: Without dead ends: 222 [2021-11-23 01:52:38,154 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 01:52:38,155 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 6 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 01:52:38,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 304 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 01:52:38,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-11-23 01:52:38,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 218. [2021-11-23 01:52:38,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 154 states have (on average 1.5584415584415585) internal successors, (240), 185 states have internal predecessors, (240), 25 states have call successors, (25), 12 states have call predecessors, (25), 14 states have return successors, (31), 20 states have call predecessors, (31), 25 states have call successors, (31) [2021-11-23 01:52:38,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 296 transitions. [2021-11-23 01:52:38,173 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 296 transitions. Word has length 20 [2021-11-23 01:52:38,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:52:38,174 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 296 transitions. [2021-11-23 01:52:38,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 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 01:52:38,174 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 296 transitions. [2021-11-23 01:52:38,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 01:52:38,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:52:38,177 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 01:52:38,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-23 01:52:38,178 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-23 01:52:38,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:52:38,178 INFO L85 PathProgramCache]: Analyzing trace with hash -2029912448, now seen corresponding path program 1 times [2021-11-23 01:52:38,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:52:38,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611448706] [2021-11-23 01:52:38,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:38,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:52:38,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:38,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:52:38,600 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:52:38,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611448706] [2021-11-23 01:52:38,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611448706] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:52:38,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537160444] [2021-11-23 01:52:38,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:38,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:52:38,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:52:38,601 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:52:38,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 01:52:38,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:38,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-23 01:52:38,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:52:38,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 01:52:38,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-23 01:52:38,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-11-23 01:52:38,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:52:38,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:52:39,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2021-11-23 01:52:39,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:52:39,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537160444] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:52:39,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1227612653] [2021-11-23 01:52:39,210 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-23 01:52:39,210 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:52:39,210 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:52:39,211 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:52:39,211 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:52:39,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-23 01:52:39,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-23 01:52:39,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 01:52:39,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 01:52:39,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-23 01:52:39,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 01:52:39,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 01:52:39,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-23 01:52:39,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-23 01:52:39,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-23 01:52:39,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-23 01:52:39,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-23 01:52:39,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-23 01:52:39,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-23 01:52:39,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-23 01:52:39,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:39,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 45 [2021-11-23 01:52:39,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:39,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 45 [2021-11-23 01:52:39,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 49 [2021-11-23 01:52:39,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:39,621 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-23 01:52:39,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 215 treesize of output 160 [2021-11-23 01:52:39,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:39,647 INFO L354 Elim1Store]: treesize reduction 63, result has 17.1 percent of original size [2021-11-23 01:52:39,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 219 [2021-11-23 01:52:39,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:39,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-23 01:52:39,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:52:39,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:52:39,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-23 01:52:39,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:39,730 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-23 01:52:39,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 01:52:39,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:39,749 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 01:52:39,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-23 01:52:39,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-23 01:52:39,841 INFO L354 Elim1Store]: treesize reduction 32, result has 58.4 percent of original size [2021-11-23 01:52:39,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 66 [2021-11-23 01:52:39,925 INFO L354 Elim1Store]: treesize reduction 68, result has 31.3 percent of original size [2021-11-23 01:52:39,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 45 [2021-11-23 01:52:39,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-23 01:52:39,985 INFO L354 Elim1Store]: treesize reduction 71, result has 17.4 percent of original size [2021-11-23 01:52:39,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 197 treesize of output 148 [2021-11-23 01:52:40,011 INFO L354 Elim1Store]: treesize reduction 63, result has 17.1 percent of original size [2021-11-23 01:52:40,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 193 treesize of output 174 [2021-11-23 01:52:40,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:52:40,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:52:40,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-23 01:52:40,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-23 01:52:40,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:40,076 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 01:52:40,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-23 01:52:40,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:40,093 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-23 01:52:40,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 01:52:40,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-23 01:52:40,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 01:52:40,310 INFO L197 IcfgInterpreter]: Interpreting procedure is_list_containing_x with input of size 21 for LOIs [2021-11-23 01:52:40,319 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:52:42,536 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7017#(and (<= 0 |ULTIMATE.start_main_~tail~0#1.base|) (= (select |#valid| |ULTIMATE.start_remove_~x#1.base|) 1) (= |ULTIMATE.start_remove_#in~x#1.offset| |ULTIMATE.start_main_~x~0#1.offset|) (= |ULTIMATE.start_main_~#list~0#1.base| |ULTIMATE.start_main_~x~0#1.base|) (= |ULTIMATE.start_remove_#t~mem4#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4))) (<= (+ 8 |ULTIMATE.start_remove_~x#1.offset|) (select |#length| |ULTIMATE.start_remove_~x#1.base|)) (<= 0 |ULTIMATE.start_main_~tail~0#1.offset|) (= |ULTIMATE.start_remove_#in~x#1.base| |ULTIMATE.start_main_~x~0#1.base|) (< |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 256) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4)) |ULTIMATE.start_remove_#t~mem4#1.offset|) (<= |#NULL.offset| 0) (= (mod (+ 255 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (- 256)) 0) (<= 0 |ULTIMATE.start_main_~#list~0#1.base|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) |ULTIMATE.start_remove_~x#1.offset|) |ULTIMATE.start_remove_#t~mem5#1.base|) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= 0 |ULTIMATE.start_remove_~x#1.offset|) (<= |ULTIMATE.start_main_~#list~0#1.offset| 0) (= |ULTIMATE.start_remove_#t~mem5#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) |ULTIMATE.start_remove_~x#1.offset|)) (= |ULTIMATE.start_main_~#list~0#1.offset| |ULTIMATE.start_main_~x~0#1.offset|) (= |ULTIMATE.start_remove_#in~x#1.offset| |ULTIMATE.start_remove_~x#1.offset|) (or (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4)) 0)) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4)) 0))) (= |ULTIMATE.start_remove_#in~x#1.base| |ULTIMATE.start_remove_~x#1.base|) (not (= (select |#valid| |ULTIMATE.start_remove_#t~mem4#1.base|) 1)) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= |ULTIMATE.start_main_~tail~0#1.offset| 0))' at error location [2021-11-23 01:52:42,536 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:52:42,537 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 01:52:42,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 9] total 27 [2021-11-23 01:52:42,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149106509] [2021-11-23 01:52:42,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 01:52:42,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-23 01:52:42,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:52:42,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-23 01:52:42,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1721, Unknown=0, NotChecked=0, Total=1892 [2021-11-23 01:52:42,539 INFO L87 Difference]: Start difference. First operand 218 states and 296 transitions. Second operand has 28 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 25 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 01:52:44,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:52:44,105 INFO L93 Difference]: Finished difference Result 363 states and 490 transitions. [2021-11-23 01:52:44,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 01:52:44,106 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 25 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2021-11-23 01:52:44,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:52:44,110 INFO L225 Difference]: With dead ends: 363 [2021-11-23 01:52:44,110 INFO L226 Difference]: Without dead ends: 363 [2021-11-23 01:52:44,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=285, Invalid=2685, Unknown=0, NotChecked=0, Total=2970 [2021-11-23 01:52:44,112 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 449 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 1366 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 1743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 01:52:44,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [454 Valid, 995 Invalid, 1743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1366 Invalid, 0 Unknown, 225 Unchecked, 0.9s Time] [2021-11-23 01:52:44,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-11-23 01:52:44,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 219. [2021-11-23 01:52:44,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 155 states have (on average 1.5612903225806452) internal successors, (242), 186 states have internal predecessors, (242), 25 states have call successors, (25), 12 states have call predecessors, (25), 14 states have return successors, (31), 20 states have call predecessors, (31), 25 states have call successors, (31) [2021-11-23 01:52:44,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 298 transitions. [2021-11-23 01:52:44,127 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 298 transitions. Word has length 20 [2021-11-23 01:52:44,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:52:44,127 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 298 transitions. [2021-11-23 01:52:44,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 25 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 01:52:44,128 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 298 transitions. [2021-11-23 01:52:44,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 01:52:44,129 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:52:44,129 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 01:52:44,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 01:52:44,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:52:44,354 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-23 01:52:44,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:52:44,355 INFO L85 PathProgramCache]: Analyzing trace with hash -2029912447, now seen corresponding path program 1 times [2021-11-23 01:52:44,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:52:44,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358714563] [2021-11-23 01:52:44,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:44,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:52:44,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:44,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:52:44,672 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:52:44,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358714563] [2021-11-23 01:52:44,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358714563] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:52:44,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270712385] [2021-11-23 01:52:44,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:44,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:52:44,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:52:44,674 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:52:44,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 01:52:44,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:44,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-23 01:52:44,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:52:44,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 01:52:44,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:52:44,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-23 01:52:45,256 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 01:52:45,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 45 [2021-11-23 01:52:45,263 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 01:52:45,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 42 [2021-11-23 01:52:45,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:52:45,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:52:45,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270712385] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:52:45,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1702670427] [2021-11-23 01:52:45,675 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-23 01:52:45,676 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:52:45,676 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:52:45,676 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:52:45,676 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:52:45,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:45,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:45,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-23 01:52:45,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 01:52:45,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:45,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-23 01:52:45,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 01:52:45,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:45,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 01:52:45,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:45,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-23 01:52:45,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:45,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 01:52:45,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:45,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:45,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:45,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:45,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:45,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-23 01:52:45,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:45,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:45,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-23 01:52:45,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:45,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-23 01:52:45,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:45,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:45,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-23 01:52:45,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:45,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:45,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:45,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-23 01:52:45,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:45,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:45,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:45,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-23 01:52:45,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:45,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-23 01:52:45,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:45,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:45,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:45,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:45,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:45,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 45 [2021-11-23 01:52:45,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:45,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:45,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:45,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:45,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:45,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 45 [2021-11-23 01:52:46,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:46,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-23 01:52:46,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:46,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:46,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:46,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:46,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:46,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:46,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:46,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:46,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:46,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 54 [2021-11-23 01:52:46,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:46,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-23 01:52:46,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:46,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:46,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:46,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:46,150 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-23 01:52:46,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 215 treesize of output 160 [2021-11-23 01:52:46,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:46,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:46,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:46,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:46,176 INFO L354 Elim1Store]: treesize reduction 63, result has 17.1 percent of original size [2021-11-23 01:52:46,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 219 [2021-11-23 01:52:46,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-23 01:52:46,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:52:46,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:52:46,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:46,264 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 01:52:46,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-23 01:52:46,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:46,313 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-23 01:52:46,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 01:52:46,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-23 01:52:46,384 INFO L354 Elim1Store]: treesize reduction 32, result has 58.4 percent of original size [2021-11-23 01:52:46,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 66 [2021-11-23 01:52:46,499 INFO L354 Elim1Store]: treesize reduction 68, result has 31.3 percent of original size [2021-11-23 01:52:46,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 45 [2021-11-23 01:52:46,569 INFO L354 Elim1Store]: treesize reduction 71, result has 17.4 percent of original size [2021-11-23 01:52:46,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 244 treesize of output 201 [2021-11-23 01:52:46,591 INFO L354 Elim1Store]: treesize reduction 63, result has 17.1 percent of original size [2021-11-23 01:52:46,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 240 treesize of output 197 [2021-11-23 01:52:46,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-23 01:52:46,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:52:46,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-23 01:52:46,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:52:46,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:46,685 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 01:52:46,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-23 01:52:46,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-23 01:52:46,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:46,741 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-23 01:52:46,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 01:52:46,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-23 01:52:47,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 01:52:47,006 INFO L197 IcfgInterpreter]: Interpreting procedure is_list_containing_x with input of size 21 for LOIs [2021-11-23 01:52:47,023 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:52:49,011 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7746#(and (<= 0 |ULTIMATE.start_main_~tail~0#1.base|) (= (select |#valid| |ULTIMATE.start_remove_~x#1.base|) 1) (= |ULTIMATE.start_remove_#in~x#1.offset| |ULTIMATE.start_main_~x~0#1.offset|) (= |ULTIMATE.start_main_~#list~0#1.base| |ULTIMATE.start_main_~x~0#1.base|) (= |ULTIMATE.start_remove_#t~mem4#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4))) (<= (+ 8 |ULTIMATE.start_remove_~x#1.offset|) (select |#length| |ULTIMATE.start_remove_~x#1.base|)) (<= 0 |ULTIMATE.start_main_~tail~0#1.offset|) (= (mod (+ (* |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 255) 1) 256) 0) (or (< (select |#length| |ULTIMATE.start_remove_#t~mem4#1.base|) (+ |ULTIMATE.start_remove_#t~mem4#1.offset| 4)) (< |ULTIMATE.start_remove_#t~mem4#1.offset| 0)) (= |ULTIMATE.start_remove_#in~x#1.base| |ULTIMATE.start_main_~x~0#1.base|) (< |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 256) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4)) |ULTIMATE.start_remove_#t~mem4#1.offset|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#list~0#1.base|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) |ULTIMATE.start_remove_~x#1.offset|) |ULTIMATE.start_remove_#t~mem5#1.base|) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= 0 |ULTIMATE.start_remove_~x#1.offset|) (<= |ULTIMATE.start_main_~#list~0#1.offset| 0) (= |ULTIMATE.start_remove_#t~mem5#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) |ULTIMATE.start_remove_~x#1.offset|)) (= |ULTIMATE.start_main_~#list~0#1.offset| |ULTIMATE.start_main_~x~0#1.offset|) (= |ULTIMATE.start_remove_#in~x#1.offset| |ULTIMATE.start_remove_~x#1.offset|) (or (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4)) 0)) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4)) 0))) (= |ULTIMATE.start_remove_#in~x#1.base| |ULTIMATE.start_remove_~x#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= |ULTIMATE.start_main_~tail~0#1.offset| 0))' at error location [2021-11-23 01:52:49,011 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:52:49,011 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 01:52:49,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-11-23 01:52:49,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625503987] [2021-11-23 01:52:49,012 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 01:52:49,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 01:52:49,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:52:49,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 01:52:49,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1883, Unknown=0, NotChecked=0, Total=2070 [2021-11-23 01:52:49,013 INFO L87 Difference]: Start difference. First operand 219 states and 298 transitions. Second operand has 25 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 21 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 01:52:50,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:52:50,044 INFO L93 Difference]: Finished difference Result 259 states and 333 transitions. [2021-11-23 01:52:50,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 01:52:50,044 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 21 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-11-23 01:52:50,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:52:50,047 INFO L225 Difference]: With dead ends: 259 [2021-11-23 01:52:50,047 INFO L226 Difference]: Without dead ends: 259 [2021-11-23 01:52:50,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=309, Invalid=3113, Unknown=0, NotChecked=0, Total=3422 [2021-11-23 01:52:50,049 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 243 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 217 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 01:52:50,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 607 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 596 Invalid, 0 Unknown, 217 Unchecked, 0.4s Time] [2021-11-23 01:52:50,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-11-23 01:52:50,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 219. [2021-11-23 01:52:50,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 155 states have (on average 1.5548387096774194) internal successors, (241), 186 states have internal predecessors, (241), 25 states have call successors, (25), 12 states have call predecessors, (25), 14 states have return successors, (31), 20 states have call predecessors, (31), 25 states have call successors, (31) [2021-11-23 01:52:50,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 297 transitions. [2021-11-23 01:52:50,059 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 297 transitions. Word has length 20 [2021-11-23 01:52:50,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:52:50,060 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 297 transitions. [2021-11-23 01:52:50,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 21 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 01:52:50,060 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 297 transitions. [2021-11-23 01:52:50,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 01:52:50,061 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:52:50,061 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 01:52:50,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 01:52:50,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-23 01:52:50,270 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-23 01:52:50,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:52:50,271 INFO L85 PathProgramCache]: Analyzing trace with hash -474693630, now seen corresponding path program 1 times [2021-11-23 01:52:50,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:52:50,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714340420] [2021-11-23 01:52:50,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:50,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:52:50,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:50,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:52:50,527 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:52:50,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714340420] [2021-11-23 01:52:50,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714340420] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:52:50,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558356376] [2021-11-23 01:52:50,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:50,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:52:50,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:52:50,529 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:52:50,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 01:52:50,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:50,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-23 01:52:50,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:52:50,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-23 01:52:53,026 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 01:52:53,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-11-23 01:52:53,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:52:53,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:52:54,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558356376] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:52:54,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [741965959] [2021-11-23 01:52:54,111 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2021-11-23 01:52:54,111 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:52:54,111 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:52:54,112 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:52:54,112 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:52:54,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-23 01:52:54,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 01:52:54,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 01:52:54,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-23 01:52:54,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 01:52:54,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-23 01:52:54,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 01:52:54,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-23 01:52:54,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-23 01:52:54,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-23 01:52:54,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-23 01:52:54,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-23 01:52:54,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-23 01:52:54,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-23 01:52:54,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:54,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 45 [2021-11-23 01:52:54,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-23 01:52:54,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:54,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 45 [2021-11-23 01:52:54,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 60 [2021-11-23 01:52:54,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,567 INFO L354 Elim1Store]: treesize reduction 192, result has 13.1 percent of original size [2021-11-23 01:52:54,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 268 treesize of output 207 [2021-11-23 01:52:54,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,614 INFO L354 Elim1Store]: treesize reduction 168, result has 13.8 percent of original size [2021-11-23 01:52:54,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 264 treesize of output 242 [2021-11-23 01:52:54,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-23 01:52:54,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:52:54,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-23 01:52:54,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:52:54,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:54,718 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-23 01:52:54,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 01:52:54,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:54,735 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 01:52:54,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-23 01:52:54,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-23 01:52:54,791 INFO L354 Elim1Store]: treesize reduction 68, result has 31.3 percent of original size [2021-11-23 01:52:54,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 45 [2021-11-23 01:52:54,805 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-23 01:52:54,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 38 [2021-11-23 01:52:54,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-23 01:52:54,847 INFO L354 Elim1Store]: treesize reduction 63, result has 17.1 percent of original size [2021-11-23 01:52:54,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 124 treesize of output 111 [2021-11-23 01:52:54,865 INFO L354 Elim1Store]: treesize reduction 71, result has 17.4 percent of original size [2021-11-23 01:52:54,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 120 treesize of output 95 [2021-11-23 01:52:54,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:52:54,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:52:54,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-23 01:52:54,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-23 01:52:54,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:54,956 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-23 01:52:54,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 01:52:54,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:54,972 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 01:52:54,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-23 01:52:55,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 01:52:55,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-23 01:52:55,178 INFO L197 IcfgInterpreter]: Interpreting procedure is_list_containing_x with input of size 18 for LOIs [2021-11-23 01:52:55,184 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:53:01,512 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8384#(and (not (= (select |#valid| |ULTIMATE.start_remove_#t~mem7#1.base|) 1)) (<= 0 |ULTIMATE.start_main_~tail~0#1.base|) (= (select |#valid| |ULTIMATE.start_remove_~x#1.base|) 1) (= |ULTIMATE.start_remove_#in~x#1.offset| |ULTIMATE.start_main_~x~0#1.offset|) (= |ULTIMATE.start_main_~#list~0#1.base| |ULTIMATE.start_main_~x~0#1.base|) (<= (+ 8 |ULTIMATE.start_remove_~x#1.offset|) (select |#length| |ULTIMATE.start_remove_~x#1.base|)) (<= 0 |ULTIMATE.start_main_~tail~0#1.offset|) (= (mod (+ (* |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 255) 1) 256) 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4)) 0) (= |ULTIMATE.start_remove_#in~x#1.base| |ULTIMATE.start_main_~x~0#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4)) |ULTIMATE.start_remove_#t~mem8#1.offset|) (< |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 256) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#list~0#1.base|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= 0 |ULTIMATE.start_remove_~x#1.offset|) (<= |ULTIMATE.start_main_~#list~0#1.offset| 0) (or (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) |ULTIMATE.start_remove_~x#1.offset|) 0)) (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) |ULTIMATE.start_remove_~x#1.offset|) 0))) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4)) 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) |ULTIMATE.start_remove_~x#1.offset|) |ULTIMATE.start_remove_#t~mem7#1.base|) (= |ULTIMATE.start_main_~#list~0#1.offset| |ULTIMATE.start_main_~x~0#1.offset|) (= |ULTIMATE.start_remove_#in~x#1.offset| |ULTIMATE.start_remove_~x#1.offset|) (= |ULTIMATE.start_remove_#in~x#1.base| |ULTIMATE.start_remove_~x#1.base|) (= |ULTIMATE.start_remove_#t~mem7#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) |ULTIMATE.start_remove_~x#1.offset|)) (= |ULTIMATE.start_remove_#t~mem8#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4))) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= |ULTIMATE.start_main_~tail~0#1.offset| 0))' at error location [2021-11-23 01:53:01,512 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:53:01,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 01:53:01,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-11-23 01:53:01,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831852312] [2021-11-23 01:53:01,513 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 01:53:01,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-23 01:53:01,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:53:01,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-23 01:53:01,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1727, Unknown=4, NotChecked=0, Total=1892 [2021-11-23 01:53:01,515 INFO L87 Difference]: Start difference. First operand 219 states and 297 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 01:53:06,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:53:06,379 INFO L93 Difference]: Finished difference Result 259 states and 331 transitions. [2021-11-23 01:53:06,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 01:53:06,380 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-11-23 01:53:06,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:53:06,381 INFO L225 Difference]: With dead ends: 259 [2021-11-23 01:53:06,382 INFO L226 Difference]: Without dead ends: 257 [2021-11-23 01:53:06,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=287, Invalid=3129, Unknown=6, NotChecked=0, Total=3422 [2021-11-23 01:53:06,383 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 197 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 01:53:06,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 685 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 563 Invalid, 0 Unknown, 79 Unchecked, 0.4s Time] [2021-11-23 01:53:06,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-11-23 01:53:06,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 214. [2021-11-23 01:53:06,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 150 states have (on average 1.56) internal successors, (234), 182 states have internal predecessors, (234), 25 states have call successors, (25), 12 states have call predecessors, (25), 14 states have return successors, (31), 19 states have call predecessors, (31), 25 states have call successors, (31) [2021-11-23 01:53:06,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 290 transitions. [2021-11-23 01:53:06,393 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 290 transitions. Word has length 22 [2021-11-23 01:53:06,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:53:06,394 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 290 transitions. [2021-11-23 01:53:06,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 01:53:06,394 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 290 transitions. [2021-11-23 01:53:06,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 01:53:06,395 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:53:06,395 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 01:53:06,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 01:53:06,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-23 01:53:06,622 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-23 01:53:06,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:53:06,622 INFO L85 PathProgramCache]: Analyzing trace with hash -787313730, now seen corresponding path program 1 times [2021-11-23 01:53:06,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:53:06,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440388060] [2021-11-23 01:53:06,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:53:06,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:53:06,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:53:06,658 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 01:53:06,659 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:53:06,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440388060] [2021-11-23 01:53:06,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440388060] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:53:06,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:53:06,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 01:53:06,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923094568] [2021-11-23 01:53:06,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:53:06,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 01:53:06,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:53:06,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 01:53:06,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:53:06,661 INFO L87 Difference]: Start difference. First operand 214 states and 290 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 01:53:06,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:53:06,809 INFO L93 Difference]: Finished difference Result 221 states and 284 transitions. [2021-11-23 01:53:06,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 01:53:06,810 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2021-11-23 01:53:06,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:53:06,811 INFO L225 Difference]: With dead ends: 221 [2021-11-23 01:53:06,811 INFO L226 Difference]: Without dead ends: 221 [2021-11-23 01:53:06,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 01:53:06,812 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 179 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:53:06,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 137 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:53:06,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-11-23 01:53:06,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 211. [2021-11-23 01:53:06,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 150 states have (on average 1.5) internal successors, (225), 179 states have internal predecessors, (225), 25 states have call successors, (25), 12 states have call predecessors, (25), 14 states have return successors, (31), 19 states have call predecessors, (31), 25 states have call successors, (31) [2021-11-23 01:53:06,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 281 transitions. [2021-11-23 01:53:06,824 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 281 transitions. Word has length 23 [2021-11-23 01:53:06,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:53:06,825 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 281 transitions. [2021-11-23 01:53:06,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 01:53:06,826 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 281 transitions. [2021-11-23 01:53:06,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 01:53:06,826 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:53:06,826 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 01:53:06,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-23 01:53:06,827 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-23 01:53:06,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:53:06,827 INFO L85 PathProgramCache]: Analyzing trace with hash -787313729, now seen corresponding path program 1 times [2021-11-23 01:53:06,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:53:06,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911272109] [2021-11-23 01:53:06,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:53:06,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:53:06,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:53:06,906 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 01:53:06,906 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:53:06,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911272109] [2021-11-23 01:53:06,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911272109] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:53:06,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:53:06,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 01:53:06,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193990995] [2021-11-23 01:53:06,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:53:06,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 01:53:06,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:53:06,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 01:53:06,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:53:06,909 INFO L87 Difference]: Start difference. First operand 211 states and 281 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 01:53:07,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:53:07,109 INFO L93 Difference]: Finished difference Result 219 states and 281 transitions. [2021-11-23 01:53:07,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 01:53:07,110 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2021-11-23 01:53:07,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:53:07,111 INFO L225 Difference]: With dead ends: 219 [2021-11-23 01:53:07,111 INFO L226 Difference]: Without dead ends: 219 [2021-11-23 01:53:07,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 01:53:07,112 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 127 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:53:07,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 158 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:53:07,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-11-23 01:53:07,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 211. [2021-11-23 01:53:07,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 150 states have (on average 1.4733333333333334) internal successors, (221), 179 states have internal predecessors, (221), 25 states have call successors, (25), 12 states have call predecessors, (25), 14 states have return successors, (31), 19 states have call predecessors, (31), 25 states have call successors, (31) [2021-11-23 01:53:07,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 277 transitions. [2021-11-23 01:53:07,128 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 277 transitions. Word has length 23 [2021-11-23 01:53:07,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:53:07,128 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 277 transitions. [2021-11-23 01:53:07,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 01:53:07,128 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 277 transitions. [2021-11-23 01:53:07,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 01:53:07,129 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:53:07,129 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:53:07,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-23 01:53:07,129 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting is_list_containing_xErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-23 01:53:07,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:53:07,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1226886611, now seen corresponding path program 1 times [2021-11-23 01:53:07,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:53:07,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760977782] [2021-11-23 01:53:07,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:53:07,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:53:07,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:53:07,305 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 01:53:07,305 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:53:07,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760977782] [2021-11-23 01:53:07,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760977782] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:53:07,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074889176] [2021-11-23 01:53:07,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:53:07,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:53:07,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:53:07,306 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:53:07,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 01:53:07,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:53:07,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-23 01:53:07,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:53:07,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 01:53:07,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-11-23 01:53:07,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:53:07,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-11-23 01:53:07,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-11-23 01:53:07,704 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 01:53:07,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:53:07,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2021-11-23 01:53:07,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:07,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:07,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:07,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:07,955 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 01:53:07,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074889176] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:53:07,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [166364329] [2021-11-23 01:53:07,957 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-23 01:53:07,957 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:53:07,957 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 01:53:07,959 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 01:53:07,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 24 [2021-11-23 01:53:07,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573707913] [2021-11-23 01:53:07,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 01:53:07,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 01:53:07,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:53:07,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 01:53:07,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-11-23 01:53:07,961 INFO L87 Difference]: Start difference. First operand 211 states and 277 transitions. Second operand has 25 states, 22 states have (on average 2.772727272727273) internal successors, (61), 20 states have internal predecessors, (61), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:53:08,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:53:08,839 INFO L93 Difference]: Finished difference Result 245 states and 308 transitions. [2021-11-23 01:53:08,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 01:53:08,840 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.772727272727273) internal successors, (61), 20 states have internal predecessors, (61), 5 states have call successors, (5), 5 states have call predecessors, (5), 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 01:53:08,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:53:08,842 INFO L225 Difference]: With dead ends: 245 [2021-11-23 01:53:08,842 INFO L226 Difference]: Without dead ends: 245 [2021-11-23 01:53:08,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2021-11-23 01:53:08,843 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 395 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 1272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 01:53:08,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 816 Invalid, 1272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 01:53:08,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-11-23 01:53:08,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 210. [2021-11-23 01:53:08,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 150 states have (on average 1.4533333333333334) internal successors, (218), 178 states have internal predecessors, (218), 25 states have call successors, (25), 12 states have call predecessors, (25), 14 states have return successors, (31), 19 states have call predecessors, (31), 25 states have call successors, (31) [2021-11-23 01:53:08,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 274 transitions. [2021-11-23 01:53:08,853 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 274 transitions. Word has length 24 [2021-11-23 01:53:08,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:53:08,854 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 274 transitions. [2021-11-23 01:53:08,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.772727272727273) internal successors, (61), 20 states have internal predecessors, (61), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:53:08,854 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 274 transitions. [2021-11-23 01:53:08,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 01:53:08,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:53:08,855 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:53:08,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 01:53:09,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:53:09,066 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-23 01:53:09,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:53:09,066 INFO L85 PathProgramCache]: Analyzing trace with hash 840902531, now seen corresponding path program 1 times [2021-11-23 01:53:09,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:53:09,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711324433] [2021-11-23 01:53:09,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:53:09,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:53:09,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:53:09,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 01:53:09,153 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:53:09,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711324433] [2021-11-23 01:53:09,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711324433] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:53:09,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116826445] [2021-11-23 01:53:09,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:53:09,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:53:09,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:53:09,171 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:53:09,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 01:53:09,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:53:09,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-23 01:53:09,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:53:09,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 01:53:09,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 01:53:09,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:53:09,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-11-23 01:53:09,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 01:53:09,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116826445] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:53:09,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2000240472] [2021-11-23 01:53:09,936 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-23 01:53:09,936 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:53:09,937 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 01:53:09,938 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 01:53:09,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 18 [2021-11-23 01:53:09,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27396385] [2021-11-23 01:53:09,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 01:53:09,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 01:53:09,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:53:09,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 01:53:09,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-11-23 01:53:09,941 INFO L87 Difference]: Start difference. First operand 210 states and 274 transitions. Second operand has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-23 01:53:10,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:53:10,333 INFO L93 Difference]: Finished difference Result 275 states and 351 transitions. [2021-11-23 01:53:10,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 01:53:10,340 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 25 [2021-11-23 01:53:10,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:53:10,342 INFO L225 Difference]: With dead ends: 275 [2021-11-23 01:53:10,343 INFO L226 Difference]: Without dead ends: 273 [2021-11-23 01:53:10,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-11-23 01:53:10,344 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 178 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 01:53:10,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 457 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 328 Invalid, 0 Unknown, 125 Unchecked, 0.3s Time] [2021-11-23 01:53:10,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-11-23 01:53:10,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 218. [2021-11-23 01:53:10,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 156 states have (on average 1.4294871794871795) internal successors, (223), 184 states have internal predecessors, (223), 26 states have call successors, (26), 13 states have call predecessors, (26), 15 states have return successors, (30), 20 states have call predecessors, (30), 26 states have call successors, (30) [2021-11-23 01:53:10,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 279 transitions. [2021-11-23 01:53:10,356 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 279 transitions. Word has length 25 [2021-11-23 01:53:10,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:53:10,356 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 279 transitions. [2021-11-23 01:53:10,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-23 01:53:10,357 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 279 transitions. [2021-11-23 01:53:10,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 01:53:10,357 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:53:10,358 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:53:10,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 01:53:10,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-23 01:53:10,586 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-23 01:53:10,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:53:10,586 INFO L85 PathProgramCache]: Analyzing trace with hash 840902532, now seen corresponding path program 1 times [2021-11-23 01:53:10,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:53:10,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478353085] [2021-11-23 01:53:10,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:53:10,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:53:10,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:53:10,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 01:53:10,721 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:53:10,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478353085] [2021-11-23 01:53:10,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478353085] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:53:10,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993347373] [2021-11-23 01:53:10,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:53:10,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:53:10,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:53:10,723 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:53:10,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 01:53:10,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:53:10,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-23 01:53:10,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:53:10,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 01:53:11,193 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 01:53:11,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:53:11,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 01:53:11,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 01:53:11,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993347373] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:53:11,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1589586262] [2021-11-23 01:53:11,851 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-23 01:53:11,852 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:53:11,852 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 01:53:11,852 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 01:53:11,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 24 [2021-11-23 01:53:11,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034325398] [2021-11-23 01:53:11,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 01:53:11,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 01:53:11,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:53:11,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 01:53:11,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-11-23 01:53:11,854 INFO L87 Difference]: Start difference. First operand 218 states and 279 transitions. Second operand has 25 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 01:53:12,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:53:12,499 INFO L93 Difference]: Finished difference Result 280 states and 351 transitions. [2021-11-23 01:53:12,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 01:53:12,499 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 25 [2021-11-23 01:53:12,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:53:12,501 INFO L225 Difference]: With dead ends: 280 [2021-11-23 01:53:12,501 INFO L226 Difference]: Without dead ends: 280 [2021-11-23 01:53:12,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2021-11-23 01:53:12,502 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 287 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 01:53:12,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 602 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 806 Invalid, 0 Unknown, 144 Unchecked, 0.5s Time] [2021-11-23 01:53:12,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-11-23 01:53:12,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 220. [2021-11-23 01:53:12,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 158 states have (on average 1.4113924050632911) internal successors, (223), 186 states have internal predecessors, (223), 26 states have call successors, (26), 13 states have call predecessors, (26), 15 states have return successors, (30), 20 states have call predecessors, (30), 26 states have call successors, (30) [2021-11-23 01:53:12,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 279 transitions. [2021-11-23 01:53:12,512 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 279 transitions. Word has length 25 [2021-11-23 01:53:12,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:53:12,512 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 279 transitions. [2021-11-23 01:53:12,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 01:53:12,512 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 279 transitions. [2021-11-23 01:53:12,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 01:53:12,513 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:53:12,513 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:53:12,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 01:53:12,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-23 01:53:12,734 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-23 01:53:12,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:53:12,735 INFO L85 PathProgramCache]: Analyzing trace with hash 856309015, now seen corresponding path program 1 times [2021-11-23 01:53:12,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:53:12,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128314266] [2021-11-23 01:53:12,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:53:12,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:53:12,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:53:12,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 01:53:12,760 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:53:12,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128314266] [2021-11-23 01:53:12,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128314266] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:53:12,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:53:12,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 01:53:12,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114765799] [2021-11-23 01:53:12,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:53:12,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 01:53:12,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:53:12,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 01:53:12,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 01:53:12,763 INFO L87 Difference]: Start difference. First operand 220 states and 279 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 01:53:12,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:53:12,804 INFO L93 Difference]: Finished difference Result 226 states and 279 transitions. [2021-11-23 01:53:12,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 01:53:12,804 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2021-11-23 01:53:12,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:53:12,806 INFO L225 Difference]: With dead ends: 226 [2021-11-23 01:53:12,806 INFO L226 Difference]: Without dead ends: 226 [2021-11-23 01:53:12,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 01:53:12,813 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 22 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 01:53:12,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 223 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 01:53:12,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-23 01:53:12,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 217. [2021-11-23 01:53:12,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 157 states have (on average 1.4076433121019107) internal successors, (221), 184 states have internal predecessors, (221), 24 states have call successors, (24), 13 states have call predecessors, (24), 15 states have return successors, (28), 19 states have call predecessors, (28), 24 states have call successors, (28) [2021-11-23 01:53:12,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 273 transitions. [2021-11-23 01:53:12,822 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 273 transitions. Word has length 26 [2021-11-23 01:53:12,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:53:12,823 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 273 transitions. [2021-11-23 01:53:12,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 01:53:12,823 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 273 transitions. [2021-11-23 01:53:12,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 01:53:12,826 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:53:12,826 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 01:53:12,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-23 01:53:12,826 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-23 01:53:12,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:53:12,827 INFO L85 PathProgramCache]: Analyzing trace with hash -876853165, now seen corresponding path program 1 times [2021-11-23 01:53:12,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:53:12,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668510408] [2021-11-23 01:53:12,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:53:12,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:53:12,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:53:13,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:53:13,199 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:53:13,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668510408] [2021-11-23 01:53:13,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668510408] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:53:13,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186471199] [2021-11-23 01:53:13,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:53:13,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:53:13,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:53:13,201 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:53:13,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 01:53:13,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:53:13,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-23 01:53:13,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:53:13,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 01:53:13,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 01:53:13,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:13,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 01:53:13,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:13,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 01:53:13,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 01:53:13,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:13,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:13,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-23 01:53:13,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:13,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:13,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-23 01:53:13,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:13,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:13,638 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-23 01:53:13,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 42 [2021-11-23 01:53:13,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:13,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:13,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:13,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-23 01:53:13,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:13,835 INFO L354 Elim1Store]: treesize reduction 231, result has 9.4 percent of original size [2021-11-23 01:53:13,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 146 treesize of output 132 [2021-11-23 01:53:13,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:13,883 INFO L354 Elim1Store]: treesize reduction 183, result has 11.6 percent of original size [2021-11-23 01:53:13,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 132 treesize of output 126 [2021-11-23 01:53:14,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:53:14,708 INFO L354 Elim1Store]: treesize reduction 271, result has 18.1 percent of original size [2021-11-23 01:53:14,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 143 treesize of output 134 [2021-11-23 01:53:14,772 INFO L354 Elim1Store]: treesize reduction 168, result has 21.1 percent of original size [2021-11-23 01:53:14,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 134 treesize of output 132 [2021-11-23 01:53:14,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:14,896 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 01:53:14,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 48 [2021-11-23 01:53:14,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:53:14,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:53:33,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186471199] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:53:33,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1566222798] [2021-11-23 01:53:33,430 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2021-11-23 01:53:33,430 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:53:33,431 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:53:33,431 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:53:33,431 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:53:33,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-23 01:53:33,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-23 01:53:33,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 01:53:33,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 01:53:33,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-23 01:53:33,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 01:53:33,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 01:53:33,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-23 01:53:33,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-23 01:53:33,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-23 01:53:33,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-23 01:53:33,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-23 01:53:33,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-23 01:53:33,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-23 01:53:33,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:53:33,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 45 [2021-11-23 01:53:33,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-23 01:53:33,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:53:33,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 45 [2021-11-23 01:53:33,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 54 [2021-11-23 01:53:33,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:53:33,865 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-23 01:53:33,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 215 treesize of output 160 [2021-11-23 01:53:33,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:53:33,888 INFO L354 Elim1Store]: treesize reduction 63, result has 17.1 percent of original size [2021-11-23 01:53:33,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 219 [2021-11-23 01:53:33,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:33,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-23 01:53:33,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-23 01:53:33,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:53:33,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:53:33,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-23 01:53:33,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:53:33,986 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 01:53:33,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-23 01:53:33,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:53:34,003 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-23 01:53:34,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 01:53:34,125 INFO L354 Elim1Store]: treesize reduction 68, result has 31.3 percent of original size [2021-11-23 01:53:34,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 45 [2021-11-23 01:53:34,144 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-23 01:53:34,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 38 [2021-11-23 01:53:34,216 INFO L354 Elim1Store]: treesize reduction 63, result has 17.1 percent of original size [2021-11-23 01:53:34,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 222 treesize of output 179 [2021-11-23 01:53:34,249 INFO L354 Elim1Store]: treesize reduction 71, result has 17.4 percent of original size [2021-11-23 01:53:34,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 218 treesize of output 181 [2021-11-23 01:53:34,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-23 01:53:34,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-23 01:53:34,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:53:34,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:53:34,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:53:34,389 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 01:53:34,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-23 01:53:34,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:53:34,414 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-23 01:53:34,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 01:53:34,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-23 01:53:34,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:34,681 INFO L354 Elim1Store]: treesize reduction 62, result has 34.7 percent of original size [2021-11-23 01:53:34,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 172 treesize of output 139 [2021-11-23 01:53:34,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:34,730 INFO L354 Elim1Store]: treesize reduction 44, result has 38.0 percent of original size [2021-11-23 01:53:34,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 133 treesize of output 106 [2021-11-23 01:53:34,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 85 [2021-11-23 01:53:34,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-23 01:53:34,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 01:53:34,911 INFO L197 IcfgInterpreter]: Interpreting procedure is_list_containing_x with input of size 21 for LOIs [2021-11-23 01:53:34,919 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:53:38,825 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12362#(and (not (= (select |#valid| |ULTIMATE.start_remove_#t~mem7#1.base|) 1)) (<= 0 |ULTIMATE.start_main_~tail~0#1.base|) (= (select |#valid| |ULTIMATE.start_remove_~x#1.base|) 1) (= |ULTIMATE.start_remove_#in~x#1.offset| |ULTIMATE.start_main_~x~0#1.offset|) (= |ULTIMATE.start_main_~#list~0#1.base| |ULTIMATE.start_main_~x~0#1.base|) (<= (+ 8 |ULTIMATE.start_remove_~x#1.offset|) (select |#length| |ULTIMATE.start_remove_~x#1.base|)) (<= 0 |ULTIMATE.start_main_~tail~0#1.offset|) (= (mod (+ (* |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 255) 1) 256) 0) (= |ULTIMATE.start_remove_#in~x#1.base| |ULTIMATE.start_main_~x~0#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4)) |ULTIMATE.start_remove_#t~mem8#1.offset|) (< |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 256) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#list~0#1.base|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= 0 |ULTIMATE.start_remove_~x#1.offset|) (<= |ULTIMATE.start_main_~#list~0#1.offset| 0) (or (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) |ULTIMATE.start_remove_~x#1.offset|) 0)) (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) |ULTIMATE.start_remove_~x#1.offset|) 0))) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) |ULTIMATE.start_remove_~x#1.offset|) |ULTIMATE.start_remove_#t~mem7#1.base|) (= |ULTIMATE.start_main_~#list~0#1.offset| |ULTIMATE.start_main_~x~0#1.offset|) (= |ULTIMATE.start_remove_#in~x#1.offset| |ULTIMATE.start_remove_~x#1.offset|) (= |ULTIMATE.start_remove_#in~x#1.base| |ULTIMATE.start_remove_~x#1.base|) (or (and (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) |ULTIMATE.start_remove_~x#1.offset|) (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4))) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4)) (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) |ULTIMATE.start_remove_~x#1.offset|))) (and (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) |ULTIMATE.start_remove_~x#1.offset|) (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4))) (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4)))) (= (select |#valid| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4))) 1) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4))) (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4))) (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) |ULTIMATE.start_remove_~x#1.offset|)) (<= 0 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4))) (<= (+ (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4)) 4) (select |#length| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4)))) (or (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4)) 0)) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4)) 0))))) (= |ULTIMATE.start_remove_#t~mem7#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) |ULTIMATE.start_remove_~x#1.offset|)) (= |ULTIMATE.start_remove_#t~mem8#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4))) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= |ULTIMATE.start_main_~tail~0#1.offset| 0))' at error location [2021-11-23 01:53:38,826 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:53:38,826 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 01:53:38,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 27 [2021-11-23 01:53:38,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589992432] [2021-11-23 01:53:38,826 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 01:53:38,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-23 01:53:38,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:53:38,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-23 01:53:38,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=2854, Unknown=4, NotChecked=0, Total=3080 [2021-11-23 01:53:38,828 INFO L87 Difference]: Start difference. First operand 217 states and 273 transitions. Second operand has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 24 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 01:53:48,178 WARN L227 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 01:53:49,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:53:49,218 INFO L93 Difference]: Finished difference Result 367 states and 452 transitions. [2021-11-23 01:53:49,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-23 01:53:49,219 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 24 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2021-11-23 01:53:49,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:53:49,221 INFO L225 Difference]: With dead ends: 367 [2021-11-23 01:53:49,221 INFO L226 Difference]: Without dead ends: 367 [2021-11-23 01:53:49,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1724 ImplicationChecksByTransitivity, 32.0s TimeCoverageRelationStatistics Valid=453, Invalid=5243, Unknown=4, NotChecked=0, Total=5700 [2021-11-23 01:53:49,224 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 457 mSDsluCounter, 1442 mSDsCounter, 0 mSdLazyCounter, 1337 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 1513 SdHoareTripleChecker+Invalid, 1858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 368 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:53:49,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 1513 Invalid, 1858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1337 Invalid, 0 Unknown, 368 Unchecked, 1.1s Time] [2021-11-23 01:53:49,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-11-23 01:53:49,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 219. [2021-11-23 01:53:49,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 159 states have (on average 1.4025157232704402) internal successors, (223), 186 states have internal predecessors, (223), 24 states have call successors, (24), 13 states have call predecessors, (24), 15 states have return successors, (28), 19 states have call predecessors, (28), 24 states have call successors, (28) [2021-11-23 01:53:49,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 275 transitions. [2021-11-23 01:53:49,241 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 275 transitions. Word has length 25 [2021-11-23 01:53:49,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:53:49,241 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 275 transitions. [2021-11-23 01:53:49,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 24 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 01:53:49,242 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 275 transitions. [2021-11-23 01:53:49,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 01:53:49,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:53:49,243 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 01:53:49,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 01:53:49,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:53:49,464 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-23 01:53:49,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:53:49,465 INFO L85 PathProgramCache]: Analyzing trace with hash -46852464, now seen corresponding path program 1 times [2021-11-23 01:53:49,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:53:49,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877655497] [2021-11-23 01:53:49,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:53:49,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:53:49,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:53:49,592 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 01:53:49,593 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:53:49,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877655497] [2021-11-23 01:53:49,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877655497] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:53:49,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:53:49,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 01:53:49,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779500926] [2021-11-23 01:53:49,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:53:49,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 01:53:49,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:53:49,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 01:53:49,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:53:49,597 INFO L87 Difference]: Start difference. First operand 219 states and 275 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 01:53:49,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:53:49,735 INFO L93 Difference]: Finished difference Result 225 states and 277 transitions. [2021-11-23 01:53:49,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 01:53:49,735 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2021-11-23 01:53:49,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:53:49,737 INFO L225 Difference]: With dead ends: 225 [2021-11-23 01:53:49,737 INFO L226 Difference]: Without dead ends: 225 [2021-11-23 01:53:49,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-23 01:53:49,738 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 29 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:53:49,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 298 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:53:49,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-11-23 01:53:49,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 217. [2021-11-23 01:53:49,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 157 states have (on average 1.3885350318471337) internal successors, (218), 184 states have internal predecessors, (218), 24 states have call successors, (24), 13 states have call predecessors, (24), 15 states have return successors, (28), 19 states have call predecessors, (28), 24 states have call successors, (28) [2021-11-23 01:53:49,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 270 transitions. [2021-11-23 01:53:49,746 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 270 transitions. Word has length 26 [2021-11-23 01:53:49,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:53:49,746 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 270 transitions. [2021-11-23 01:53:49,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 01:53:49,747 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 270 transitions. [2021-11-23 01:53:49,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 01:53:49,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:53:49,748 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 01:53:49,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-23 01:53:49,748 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting is_list_containing_xErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-23 01:53:49,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:53:49,749 INFO L85 PathProgramCache]: Analyzing trace with hash 2107357873, now seen corresponding path program 1 times [2021-11-23 01:53:49,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:53:49,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490728499] [2021-11-23 01:53:49,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:53:49,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:53:49,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:53:49,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 01:53:49,813 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:53:49,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490728499] [2021-11-23 01:53:49,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490728499] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:53:49,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:53:49,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 01:53:49,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694042909] [2021-11-23 01:53:49,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:53:49,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 01:53:49,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:53:49,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 01:53:49,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:53:49,815 INFO L87 Difference]: Start difference. First operand 217 states and 270 transitions. Second operand has 6 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 01:53:49,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:53:49,959 INFO L93 Difference]: Finished difference Result 282 states and 360 transitions. [2021-11-23 01:53:49,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 01:53:49,960 INFO L78 Accepts]: Start accepts. Automaton has has 6 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 01:53:49,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:53:49,961 INFO L225 Difference]: With dead ends: 282 [2021-11-23 01:53:49,962 INFO L226 Difference]: Without dead ends: 282 [2021-11-23 01:53:49,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-23 01:53:49,962 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 44 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:53:49,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 340 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:53:49,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-11-23 01:53:49,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 263. [2021-11-23 01:53:49,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 193 states have (on average 1.4248704663212435) internal successors, (275), 221 states have internal predecessors, (275), 31 states have call successors, (31), 16 states have call predecessors, (31), 18 states have return successors, (41), 25 states have call predecessors, (41), 31 states have call successors, (41) [2021-11-23 01:53:49,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 347 transitions. [2021-11-23 01:53:49,972 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 347 transitions. Word has length 28 [2021-11-23 01:53:49,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:53:49,972 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 347 transitions. [2021-11-23 01:53:49,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 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 01:53:49,973 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 347 transitions. [2021-11-23 01:53:49,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 01:53:49,973 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:53:49,973 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 01:53:49,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-23 01:53:49,974 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-23 01:53:49,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:53:49,975 INFO L85 PathProgramCache]: Analyzing trace with hash -2066920866, now seen corresponding path program 1 times [2021-11-23 01:53:49,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:53:49,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091231192] [2021-11-23 01:53:49,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:53:49,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:53:49,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:53:50,042 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 01:53:50,042 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:53:50,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091231192] [2021-11-23 01:53:50,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091231192] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:53:50,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:53:50,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 01:53:50,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499210728] [2021-11-23 01:53:50,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:53:50,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 01:53:50,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:53:50,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 01:53:50,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 01:53:50,045 INFO L87 Difference]: Start difference. First operand 263 states and 347 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 01:53:50,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:53:50,257 INFO L93 Difference]: Finished difference Result 297 states and 391 transitions. [2021-11-23 01:53:50,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 01:53:50,258 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-11-23 01:53:50,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:53:50,259 INFO L225 Difference]: With dead ends: 297 [2021-11-23 01:53:50,259 INFO L226 Difference]: Without dead ends: 297 [2021-11-23 01:53:50,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-23 01:53:50,260 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 91 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:53:50,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 273 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:53:50,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-11-23 01:53:50,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 279. [2021-11-23 01:53:50,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 205 states have (on average 1.4097560975609755) internal successors, (289), 233 states have internal predecessors, (289), 35 states have call successors, (35), 16 states have call predecessors, (35), 18 states have return successors, (46), 29 states have call predecessors, (46), 35 states have call successors, (46) [2021-11-23 01:53:50,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 370 transitions. [2021-11-23 01:53:50,270 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 370 transitions. Word has length 28 [2021-11-23 01:53:50,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:53:50,271 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 370 transitions. [2021-11-23 01:53:50,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 01:53:50,271 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 370 transitions. [2021-11-23 01:53:50,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 01:53:50,272 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:53:50,272 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 01:53:50,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-23 01:53:50,272 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting is_list_containing_xErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-23 01:53:50,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:53:50,273 INFO L85 PathProgramCache]: Analyzing trace with hash -2027702963, now seen corresponding path program 2 times [2021-11-23 01:53:50,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:53:50,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917843812] [2021-11-23 01:53:50,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:53:50,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:53:50,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:53:50,682 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:53:50,683 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:53:50,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917843812] [2021-11-23 01:53:50,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917843812] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:53:50,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748691930] [2021-11-23 01:53:50,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 01:53:50,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:53:50,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:53:50,684 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:53:50,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501f5d3c-3674-4075-be10-6b03054429df/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 01:53:50,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 01:53:50,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 01:53:50,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-23 01:53:50,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:53:50,901 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 01:53:50,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-23 01:53:50,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:53:50,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:53:51,025 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-23 01:53:51,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 48 [2021-11-23 01:53:51,035 INFO L354 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2021-11-23 01:53:51,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 53 [2021-11-23 01:53:51,385 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-11-23 01:53:51,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 40 [2021-11-23 01:53:51,390 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 01:53:51,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 19 [2021-11-23 01:53:51,431 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:53:51,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:53:51,866 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 01:53:51,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 4529 treesize of output 3846 [2021-11-23 01:53:52,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5550 treesize of output 5346