./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext/skiplist_3lvl.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce0c96d-004b-4782-af42-6e4692912375/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce0c96d-004b-4782-af42-6e4692912375/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce0c96d-004b-4782-af42-6e4692912375/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce0c96d-004b-4782-af42-6e4692912375/bin/utaipan-6cKwYrpEi9/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext/skiplist_3lvl.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce0c96d-004b-4782-af42-6e4692912375/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce0c96d-004b-4782-af42-6e4692912375/bin/utaipan-6cKwYrpEi9 --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 a92c386f0a3e93e7f4997075243ca49a5a9660dc1b84c645c53a036868e1508d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 21:18:12,474 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 21:18:12,477 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 21:18:12,519 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 21:18:12,524 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 21:18:12,530 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 21:18:12,532 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 21:18:12,536 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 21:18:12,540 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 21:18:12,544 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 21:18:12,546 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 21:18:12,549 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 21:18:12,552 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 21:18:12,560 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 21:18:12,562 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 21:18:12,563 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 21:18:12,570 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 21:18:12,571 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 21:18:12,573 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 21:18:12,575 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 21:18:12,582 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 21:18:12,585 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 21:18:12,587 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 21:18:12,589 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 21:18:12,594 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 21:18:12,597 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 21:18:12,598 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 21:18:12,599 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 21:18:12,601 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 21:18:12,603 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 21:18:12,605 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 21:18:12,607 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 21:18:12,609 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 21:18:12,610 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 21:18:12,612 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 21:18:12,612 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 21:18:12,613 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 21:18:12,614 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 21:18:12,614 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 21:18:12,616 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 21:18:12,618 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 21:18:12,619 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce0c96d-004b-4782-af42-6e4692912375/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-20 21:18:12,678 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 21:18:12,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 21:18:12,680 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 21:18:12,680 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 21:18:12,681 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 21:18:12,682 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 21:18:12,682 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 21:18:12,682 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 21:18:12,683 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 21:18:12,683 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 21:18:12,684 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 21:18:12,685 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 21:18:12,685 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 21:18:12,685 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 21:18:12,686 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 21:18:12,686 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 21:18:12,686 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 21:18:12,687 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 21:18:12,687 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 21:18:12,688 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 21:18:12,688 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 21:18:12,688 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 21:18:12,689 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 21:18:12,689 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 21:18:12,690 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 21:18:12,690 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 21:18:12,691 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 21:18:12,691 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 21:18:12,691 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 21:18:12,692 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 21:18:12,692 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 21:18:12,692 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 21:18:12,692 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 21:18:12,693 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 21:18:12,693 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 21:18:12,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:18:12,694 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 21:18:12,694 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 21:18:12,694 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 21:18:12,695 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 21:18:12,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 21:18:12,695 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 21:18:12,696 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_1ce0c96d-004b-4782-af42-6e4692912375/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce0c96d-004b-4782-af42-6e4692912375/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a92c386f0a3e93e7f4997075243ca49a5a9660dc1b84c645c53a036868e1508d [2022-11-20 21:18:13,034 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 21:18:13,076 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 21:18:13,079 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 21:18:13,080 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 21:18:13,081 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 21:18:13,083 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce0c96d-004b-4782-af42-6e4692912375/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/memsafety-ext/skiplist_3lvl.i [2022-11-20 21:18:16,626 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 21:18:16,967 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 21:18:16,967 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce0c96d-004b-4782-af42-6e4692912375/sv-benchmarks/c/memsafety-ext/skiplist_3lvl.i [2022-11-20 21:18:16,984 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce0c96d-004b-4782-af42-6e4692912375/bin/utaipan-6cKwYrpEi9/data/bf38c7bce/3f7b6ac193d04a6ea28e3e0abc5254f8/FLAG54da6d869 [2022-11-20 21:18:17,011 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce0c96d-004b-4782-af42-6e4692912375/bin/utaipan-6cKwYrpEi9/data/bf38c7bce/3f7b6ac193d04a6ea28e3e0abc5254f8 [2022-11-20 21:18:17,015 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 21:18:17,016 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 21:18:17,018 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 21:18:17,018 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 21:18:17,022 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 21:18:17,023 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:18:17" (1/1) ... [2022-11-20 21:18:17,025 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e91de29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:18:17, skipping insertion in model container [2022-11-20 21:18:17,025 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:18:17" (1/1) ... [2022-11-20 21:18:17,035 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 21:18:17,095 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 21:18:17,460 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:18:17,473 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 21:18:17,523 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:18:17,554 INFO L208 MainTranslator]: Completed translation [2022-11-20 21:18:17,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:18:17 WrapperNode [2022-11-20 21:18:17,555 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 21:18:17,556 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 21:18:17,556 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 21:18:17,557 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 21:18:17,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:18:17" (1/1) ... [2022-11-20 21:18:17,584 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:18:17" (1/1) ... [2022-11-20 21:18:17,616 INFO L138 Inliner]: procedures = 127, calls = 55, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 175 [2022-11-20 21:18:17,616 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 21:18:17,617 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 21:18:17,618 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 21:18:17,618 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 21:18:17,629 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:18:17" (1/1) ... [2022-11-20 21:18:17,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:18:17" (1/1) ... [2022-11-20 21:18:17,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:18:17" (1/1) ... [2022-11-20 21:18:17,635 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:18:17" (1/1) ... [2022-11-20 21:18:17,647 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:18:17" (1/1) ... [2022-11-20 21:18:17,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:18:17" (1/1) ... [2022-11-20 21:18:17,654 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:18:17" (1/1) ... [2022-11-20 21:18:17,656 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:18:17" (1/1) ... [2022-11-20 21:18:17,660 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 21:18:17,661 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 21:18:17,661 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 21:18:17,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 21:18:17,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:18:17" (1/1) ... [2022-11-20 21:18:17,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:18:17,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce0c96d-004b-4782-af42-6e4692912375/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:18:17,703 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce0c96d-004b-4782-af42-6e4692912375/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 21:18:17,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce0c96d-004b-4782-af42-6e4692912375/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 21:18:17,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 21:18:17,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 21:18:17,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 21:18:17,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 21:18:17,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 21:18:17,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 21:18:17,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 21:18:17,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 21:18:17,951 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 21:18:17,967 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 21:18:18,692 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 21:18:18,880 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 21:18:18,885 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-20 21:18:18,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:18:18 BoogieIcfgContainer [2022-11-20 21:18:18,889 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 21:18:18,892 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 21:18:18,893 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 21:18:18,897 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 21:18:18,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:18:17" (1/3) ... [2022-11-20 21:18:18,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d73a6e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:18:18, skipping insertion in model container [2022-11-20 21:18:18,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:18:17" (2/3) ... [2022-11-20 21:18:18,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d73a6e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:18:18, skipping insertion in model container [2022-11-20 21:18:18,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:18:18" (3/3) ... [2022-11-20 21:18:18,905 INFO L112 eAbstractionObserver]: Analyzing ICFG skiplist_3lvl.i [2022-11-20 21:18:18,930 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 21:18:18,931 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 85 error locations. [2022-11-20 21:18:19,014 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 21:18:19,024 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2b0f3a5b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 21:18:19,024 INFO L358 AbstractCegarLoop]: Starting to check reachability of 85 error locations. [2022-11-20 21:18:19,030 INFO L276 IsEmpty]: Start isEmpty. Operand has 146 states, 60 states have (on average 2.6166666666666667) internal successors, (157), 145 states have internal predecessors, (157), 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) [2022-11-20 21:18:19,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 21:18:19,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:19,038 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 21:18:19,039 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-11-20 21:18:19,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:19,049 INFO L85 PathProgramCache]: Analyzing trace with hash 9211, now seen corresponding path program 1 times [2022-11-20 21:18:19,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:19,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156634416] [2022-11-20 21:18:19,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:19,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:19,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:19,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:18:19,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:19,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156634416] [2022-11-20 21:18:19,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156634416] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:18:19,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:18:19,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:18:19,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640221470] [2022-11-20 21:18:19,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:18:19,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:18:19,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:19,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:18:19,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:18:19,520 INFO L87 Difference]: Start difference. First operand has 146 states, 60 states have (on average 2.6166666666666667) internal successors, (157), 145 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 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) [2022-11-20 21:18:19,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:19,817 INFO L93 Difference]: Finished difference Result 165 states and 172 transitions. [2022-11-20 21:18:19,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:18:19,820 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 [2022-11-20 21:18:19,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:19,831 INFO L225 Difference]: With dead ends: 165 [2022-11-20 21:18:19,832 INFO L226 Difference]: Without dead ends: 164 [2022-11-20 21:18:19,834 INFO L412 NwaCegarLoop]: 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 [2022-11-20 21:18:19,838 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 136 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:19,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 73 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:18:19,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-11-20 21:18:19,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 136. [2022-11-20 21:18:19,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 60 states have (on average 2.3666666666666667) internal successors, (142), 135 states have internal predecessors, (142), 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) [2022-11-20 21:18:19,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 142 transitions. [2022-11-20 21:18:19,916 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 142 transitions. Word has length 2 [2022-11-20 21:18:19,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:19,917 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 142 transitions. [2022-11-20 21:18:19,917 INFO L496 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) [2022-11-20 21:18:19,917 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 142 transitions. [2022-11-20 21:18:19,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 21:18:19,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:19,918 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 21:18:19,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 21:18:19,919 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-11-20 21:18:19,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:19,920 INFO L85 PathProgramCache]: Analyzing trace with hash 9212, now seen corresponding path program 1 times [2022-11-20 21:18:19,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:19,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546165943] [2022-11-20 21:18:19,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:19,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:19,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:20,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:18:20,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:20,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546165943] [2022-11-20 21:18:20,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546165943] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:18:20,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:18:20,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:18:20,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843516550] [2022-11-20 21:18:20,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:18:20,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:18:20,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:20,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:18:20,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:18:20,149 INFO L87 Difference]: Start difference. First operand 136 states and 142 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) [2022-11-20 21:18:20,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:20,467 INFO L93 Difference]: Finished difference Result 196 states and 206 transitions. [2022-11-20 21:18:20,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:18:20,468 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 [2022-11-20 21:18:20,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:20,480 INFO L225 Difference]: With dead ends: 196 [2022-11-20 21:18:20,480 INFO L226 Difference]: Without dead ends: 196 [2022-11-20 21:18:20,481 INFO L412 NwaCegarLoop]: 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 [2022-11-20 21:18:20,482 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 98 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:20,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 129 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 21:18:20,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-11-20 21:18:20,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 127. [2022-11-20 21:18:20,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 60 states have (on average 2.216666666666667) internal successors, (133), 126 states have internal predecessors, (133), 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) [2022-11-20 21:18:20,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 133 transitions. [2022-11-20 21:18:20,510 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 133 transitions. Word has length 2 [2022-11-20 21:18:20,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:20,510 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 133 transitions. [2022-11-20 21:18:20,511 INFO L496 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) [2022-11-20 21:18:20,511 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 133 transitions. [2022-11-20 21:18:20,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 21:18:20,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:20,512 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:18:20,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 21:18:20,512 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-11-20 21:18:20,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:20,513 INFO L85 PathProgramCache]: Analyzing trace with hash 47510968, now seen corresponding path program 1 times [2022-11-20 21:18:20,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:20,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814426923] [2022-11-20 21:18:20,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:20,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:20,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:20,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:18:20,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:20,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814426923] [2022-11-20 21:18:20,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814426923] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:18:20,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:18:20,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:18:20,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329828962] [2022-11-20 21:18:20,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:18:20,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:18:20,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:20,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:18:20,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:18:20,932 INFO L87 Difference]: Start difference. First operand 127 states and 133 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) [2022-11-20 21:18:21,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:21,242 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2022-11-20 21:18:21,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:18:21,243 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 [2022-11-20 21:18:21,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:21,245 INFO L225 Difference]: With dead ends: 126 [2022-11-20 21:18:21,245 INFO L226 Difference]: Without dead ends: 126 [2022-11-20 21:18:21,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:18:21,257 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 10 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:21,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 269 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 21:18:21,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-20 21:18:21,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-11-20 21:18:21,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 60 states have (on average 2.2) internal successors, (132), 125 states have internal predecessors, (132), 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) [2022-11-20 21:18:21,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 132 transitions. [2022-11-20 21:18:21,279 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 132 transitions. Word has length 8 [2022-11-20 21:18:21,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:21,280 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 132 transitions. [2022-11-20 21:18:21,280 INFO L496 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) [2022-11-20 21:18:21,281 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 132 transitions. [2022-11-20 21:18:21,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 21:18:21,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:21,284 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:18:21,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 21:18:21,284 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-11-20 21:18:21,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:21,285 INFO L85 PathProgramCache]: Analyzing trace with hash 47510969, now seen corresponding path program 1 times [2022-11-20 21:18:21,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:21,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688446894] [2022-11-20 21:18:21,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:21,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:21,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:21,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:18:21,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:21,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688446894] [2022-11-20 21:18:21,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688446894] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:18:21,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:18:21,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:18:21,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320959687] [2022-11-20 21:18:21,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:18:21,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:18:21,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:21,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:18:21,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:18:21,765 INFO L87 Difference]: Start difference. First operand 126 states and 132 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) [2022-11-20 21:18:22,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:22,154 INFO L93 Difference]: Finished difference Result 125 states and 131 transitions. [2022-11-20 21:18:22,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:18:22,155 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 [2022-11-20 21:18:22,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:22,156 INFO L225 Difference]: With dead ends: 125 [2022-11-20 21:18:22,156 INFO L226 Difference]: Without dead ends: 125 [2022-11-20 21:18:22,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:18:22,158 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 8 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:22,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 248 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 21:18:22,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-20 21:18:22,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-11-20 21:18:22,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 60 states have (on average 2.183333333333333) internal successors, (131), 124 states have internal predecessors, (131), 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) [2022-11-20 21:18:22,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 131 transitions. [2022-11-20 21:18:22,164 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 131 transitions. Word has length 8 [2022-11-20 21:18:22,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:22,165 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 131 transitions. [2022-11-20 21:18:22,165 INFO L496 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) [2022-11-20 21:18:22,165 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 131 transitions. [2022-11-20 21:18:22,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:18:22,166 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:22,166 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:18:22,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 21:18:22,167 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-11-20 21:18:22,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:22,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1472840004, now seen corresponding path program 1 times [2022-11-20 21:18:22,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:22,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975385391] [2022-11-20 21:18:22,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:22,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:22,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:22,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:18:22,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:22,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975385391] [2022-11-20 21:18:22,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975385391] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:18:22,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:18:22,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:18:22,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314245333] [2022-11-20 21:18:22,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:18:22,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:18:22,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:22,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:18:22,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:18:22,255 INFO L87 Difference]: Start difference. First operand 125 states and 131 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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) [2022-11-20 21:18:22,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:22,487 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2022-11-20 21:18:22,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:18:22,487 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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 9 [2022-11-20 21:18:22,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:22,488 INFO L225 Difference]: With dead ends: 124 [2022-11-20 21:18:22,489 INFO L226 Difference]: Without dead ends: 124 [2022-11-20 21:18:22,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:18:22,490 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 11 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:22,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 347 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:18:22,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-20 21:18:22,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-11-20 21:18:22,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 60 states have (on average 2.1666666666666665) internal successors, (130), 123 states have internal predecessors, (130), 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) [2022-11-20 21:18:22,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 130 transitions. [2022-11-20 21:18:22,496 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 130 transitions. Word has length 9 [2022-11-20 21:18:22,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:22,507 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 130 transitions. [2022-11-20 21:18:22,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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) [2022-11-20 21:18:22,507 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 130 transitions. [2022-11-20 21:18:22,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:18:22,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:22,508 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:18:22,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 21:18:22,508 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-11-20 21:18:22,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:22,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1472840005, now seen corresponding path program 1 times [2022-11-20 21:18:22,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:22,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079016649] [2022-11-20 21:18:22,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:22,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:22,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:22,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:18:22,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:22,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079016649] [2022-11-20 21:18:22,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079016649] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:18:22,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:18:22,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 21:18:22,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695360393] [2022-11-20 21:18:22,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:18:22,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 21:18:22,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:22,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 21:18:22,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:18:22,966 INFO L87 Difference]: Start difference. First operand 124 states and 130 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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) [2022-11-20 21:18:23,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:23,369 INFO L93 Difference]: Finished difference Result 123 states and 129 transitions. [2022-11-20 21:18:23,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:18:23,370 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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 9 [2022-11-20 21:18:23,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:23,371 INFO L225 Difference]: With dead ends: 123 [2022-11-20 21:18:23,371 INFO L226 Difference]: Without dead ends: 123 [2022-11-20 21:18:23,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-20 21:18:23,372 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 12 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:23,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 337 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 21:18:23,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-11-20 21:18:23,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-11-20 21:18:23,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 60 states have (on average 2.15) internal successors, (129), 122 states have internal predecessors, (129), 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) [2022-11-20 21:18:23,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 129 transitions. [2022-11-20 21:18:23,378 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 129 transitions. Word has length 9 [2022-11-20 21:18:23,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:23,378 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 129 transitions. [2022-11-20 21:18:23,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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) [2022-11-20 21:18:23,379 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 129 transitions. [2022-11-20 21:18:23,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 21:18:23,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:23,379 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:18:23,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 21:18:23,380 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-11-20 21:18:23,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:23,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1586600133, now seen corresponding path program 1 times [2022-11-20 21:18:23,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:23,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18446405] [2022-11-20 21:18:23,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:23,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:23,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:23,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:18:23,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:23,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18446405] [2022-11-20 21:18:23,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18446405] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:18:23,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:18:23,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:18:23,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221845735] [2022-11-20 21:18:23,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:18:23,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:18:23,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:23,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:18:23,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:18:23,461 INFO L87 Difference]: Start difference. First operand 123 states and 129 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:23,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:23,675 INFO L93 Difference]: Finished difference Result 122 states and 128 transitions. [2022-11-20 21:18:23,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:18:23,676 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 21:18:23,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:23,677 INFO L225 Difference]: With dead ends: 122 [2022-11-20 21:18:23,677 INFO L226 Difference]: Without dead ends: 122 [2022-11-20 21:18:23,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:18:23,678 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 6 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:23,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 343 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:18:23,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-20 21:18:23,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-11-20 21:18:23,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 60 states have (on average 2.1333333333333333) internal successors, (128), 121 states have internal predecessors, (128), 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) [2022-11-20 21:18:23,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 128 transitions. [2022-11-20 21:18:23,683 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 128 transitions. Word has length 10 [2022-11-20 21:18:23,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:23,684 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 128 transitions. [2022-11-20 21:18:23,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:23,684 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 128 transitions. [2022-11-20 21:18:23,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 21:18:23,685 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:23,685 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:18:23,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 21:18:23,685 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-11-20 21:18:23,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:23,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1586600132, now seen corresponding path program 1 times [2022-11-20 21:18:23,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:23,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817824825] [2022-11-20 21:18:23,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:23,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:23,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:24,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:18:24,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:24,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817824825] [2022-11-20 21:18:24,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817824825] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:18:24,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:18:24,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 21:18:24,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902670233] [2022-11-20 21:18:24,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:18:24,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 21:18:24,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:24,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 21:18:24,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-20 21:18:24,291 INFO L87 Difference]: Start difference. First operand 122 states and 128 transitions. Second operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:24,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:24,703 INFO L93 Difference]: Finished difference Result 121 states and 127 transitions. [2022-11-20 21:18:24,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 21:18:24,704 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 21:18:24,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:24,705 INFO L225 Difference]: With dead ends: 121 [2022-11-20 21:18:24,705 INFO L226 Difference]: Without dead ends: 121 [2022-11-20 21:18:24,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-20 21:18:24,706 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 15 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:24,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 333 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 21:18:24,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-20 21:18:24,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-11-20 21:18:24,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 60 states have (on average 2.1166666666666667) internal successors, (127), 120 states have internal predecessors, (127), 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) [2022-11-20 21:18:24,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 127 transitions. [2022-11-20 21:18:24,710 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 127 transitions. Word has length 10 [2022-11-20 21:18:24,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:24,716 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 127 transitions. [2022-11-20 21:18:24,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:24,716 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 127 transitions. [2022-11-20 21:18:24,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 21:18:24,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:24,717 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:18:24,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 21:18:24,718 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-11-20 21:18:24,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:24,719 INFO L85 PathProgramCache]: Analyzing trace with hash -173892124, now seen corresponding path program 1 times [2022-11-20 21:18:24,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:24,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189131581] [2022-11-20 21:18:24,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:24,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:24,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:25,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:18:25,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:25,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189131581] [2022-11-20 21:18:25,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189131581] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:18:25,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:18:25,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 21:18:25,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180895609] [2022-11-20 21:18:25,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:18:25,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 21:18:25,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:25,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 21:18:25,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-20 21:18:25,338 INFO L87 Difference]: Start difference. First operand 121 states and 127 transitions. Second operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:25,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:25,804 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2022-11-20 21:18:25,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 21:18:25,805 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 21:18:25,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:25,805 INFO L225 Difference]: With dead ends: 120 [2022-11-20 21:18:25,806 INFO L226 Difference]: Without dead ends: 120 [2022-11-20 21:18:25,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-20 21:18:25,807 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 18 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:25,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 447 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 21:18:25,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-20 21:18:25,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-11-20 21:18:25,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 60 states have (on average 2.1) internal successors, (126), 119 states have internal predecessors, (126), 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) [2022-11-20 21:18:25,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 126 transitions. [2022-11-20 21:18:25,811 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 126 transitions. Word has length 14 [2022-11-20 21:18:25,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:25,812 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 126 transitions. [2022-11-20 21:18:25,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:25,812 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 126 transitions. [2022-11-20 21:18:25,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 21:18:25,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:25,813 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:18:25,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 21:18:25,814 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-11-20 21:18:25,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:25,815 INFO L85 PathProgramCache]: Analyzing trace with hash -173892123, now seen corresponding path program 1 times [2022-11-20 21:18:25,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:25,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817950897] [2022-11-20 21:18:25,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:25,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:26,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:18:26,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:26,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817950897] [2022-11-20 21:18:26,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817950897] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:18:26,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:18:26,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 21:18:26,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215724293] [2022-11-20 21:18:26,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:18:26,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 21:18:26,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:26,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 21:18:26,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-20 21:18:26,562 INFO L87 Difference]: Start difference. First operand 120 states and 126 transitions. Second operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:26,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:26,983 INFO L93 Difference]: Finished difference Result 119 states and 125 transitions. [2022-11-20 21:18:26,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 21:18:26,983 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 21:18:26,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:26,984 INFO L225 Difference]: With dead ends: 119 [2022-11-20 21:18:26,984 INFO L226 Difference]: Without dead ends: 119 [2022-11-20 21:18:26,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-20 21:18:26,986 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 16 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:26,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 410 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 21:18:26,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-20 21:18:26,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-11-20 21:18:26,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 118 states have internal predecessors, (125), 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) [2022-11-20 21:18:26,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 125 transitions. [2022-11-20 21:18:26,990 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 125 transitions. Word has length 14 [2022-11-20 21:18:26,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:26,990 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 125 transitions. [2022-11-20 21:18:26,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:26,991 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 125 transitions. [2022-11-20 21:18:26,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 21:18:26,991 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:26,992 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:18:26,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 21:18:26,992 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-11-20 21:18:26,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:26,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1095688533, now seen corresponding path program 1 times [2022-11-20 21:18:26,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:26,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451618038] [2022-11-20 21:18:26,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:26,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:27,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:27,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:18:27,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:27,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451618038] [2022-11-20 21:18:27,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451618038] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:18:27,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:18:27,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:18:27,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571620037] [2022-11-20 21:18:27,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:18:27,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:18:27,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:27,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:18:27,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:18:27,085 INFO L87 Difference]: Start difference. First operand 119 states and 125 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:27,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:27,288 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2022-11-20 21:18:27,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:18:27,289 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 21:18:27,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:27,290 INFO L225 Difference]: With dead ends: 118 [2022-11-20 21:18:27,290 INFO L226 Difference]: Without dead ends: 118 [2022-11-20 21:18:27,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:18:27,291 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 10 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:27,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 328 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:18:27,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-20 21:18:27,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2022-11-20 21:18:27,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 60 states have (on average 2.066666666666667) internal successors, (124), 117 states have internal predecessors, (124), 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) [2022-11-20 21:18:27,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 124 transitions. [2022-11-20 21:18:27,295 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 124 transitions. Word has length 15 [2022-11-20 21:18:27,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:27,299 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 124 transitions. [2022-11-20 21:18:27,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:27,300 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 124 transitions. [2022-11-20 21:18:27,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 21:18:27,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:27,301 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:18:27,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 21:18:27,303 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-11-20 21:18:27,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:27,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1095688532, now seen corresponding path program 1 times [2022-11-20 21:18:27,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:27,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592618542] [2022-11-20 21:18:27,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:27,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:27,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:28,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:18:28,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:28,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592618542] [2022-11-20 21:18:28,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592618542] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:18:28,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:18:28,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 21:18:28,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952514226] [2022-11-20 21:18:28,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:18:28,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 21:18:28,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:28,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 21:18:28,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-20 21:18:28,037 INFO L87 Difference]: Start difference. First operand 118 states and 124 transitions. Second operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:28,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:28,433 INFO L93 Difference]: Finished difference Result 117 states and 123 transitions. [2022-11-20 21:18:28,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 21:18:28,434 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 21:18:28,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:28,434 INFO L225 Difference]: With dead ends: 117 [2022-11-20 21:18:28,434 INFO L226 Difference]: Without dead ends: 117 [2022-11-20 21:18:28,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-20 21:18:28,435 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 17 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:28,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 405 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 21:18:28,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-20 21:18:28,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-11-20 21:18:28,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 60 states have (on average 2.05) internal successors, (123), 116 states have internal predecessors, (123), 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) [2022-11-20 21:18:28,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 123 transitions. [2022-11-20 21:18:28,439 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 123 transitions. Word has length 15 [2022-11-20 21:18:28,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:28,439 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 123 transitions. [2022-11-20 21:18:28,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:28,439 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 123 transitions. [2022-11-20 21:18:28,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 21:18:28,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:28,440 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:18:28,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 21:18:28,441 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-11-20 21:18:28,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:28,441 INFO L85 PathProgramCache]: Analyzing trace with hash 393393863, now seen corresponding path program 1 times [2022-11-20 21:18:28,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:28,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614916883] [2022-11-20 21:18:28,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:28,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:28,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:28,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:18:28,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:28,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614916883] [2022-11-20 21:18:28,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614916883] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:18:28,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:18:28,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:18:28,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961884903] [2022-11-20 21:18:28,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:18:28,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:18:28,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:28,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:18:28,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:18:28,573 INFO L87 Difference]: Start difference. First operand 117 states and 123 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:28,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:28,769 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2022-11-20 21:18:28,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:18:28,770 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 21:18:28,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:28,771 INFO L225 Difference]: With dead ends: 116 [2022-11-20 21:18:28,771 INFO L226 Difference]: Without dead ends: 116 [2022-11-20 21:18:28,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:18:28,772 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 5 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:28,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 324 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:18:28,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-20 21:18:28,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-11-20 21:18:28,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 60 states have (on average 2.033333333333333) internal successors, (122), 115 states have internal predecessors, (122), 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) [2022-11-20 21:18:28,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 122 transitions. [2022-11-20 21:18:28,775 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 122 transitions. Word has length 16 [2022-11-20 21:18:28,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:28,776 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 122 transitions. [2022-11-20 21:18:28,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:28,776 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 122 transitions. [2022-11-20 21:18:28,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 21:18:28,777 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:28,777 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:18:28,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 21:18:28,777 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-11-20 21:18:28,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:28,778 INFO L85 PathProgramCache]: Analyzing trace with hash 393393864, now seen corresponding path program 1 times [2022-11-20 21:18:28,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:28,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428958410] [2022-11-20 21:18:28,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:28,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:28,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:29,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:18:29,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:29,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428958410] [2022-11-20 21:18:29,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428958410] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:18:29,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:18:29,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-20 21:18:29,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582931800] [2022-11-20 21:18:29,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:18:29,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 21:18:29,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:29,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 21:18:29,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-20 21:18:29,569 INFO L87 Difference]: Start difference. First operand 116 states and 122 transitions. Second operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:30,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:30,140 INFO L93 Difference]: Finished difference Result 115 states and 121 transitions. [2022-11-20 21:18:30,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 21:18:30,141 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 21:18:30,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:30,142 INFO L225 Difference]: With dead ends: 115 [2022-11-20 21:18:30,142 INFO L226 Difference]: Without dead ends: 115 [2022-11-20 21:18:30,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-11-20 21:18:30,143 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 17 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:30,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 565 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 21:18:30,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-20 21:18:30,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-11-20 21:18:30,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 114 states have internal predecessors, (121), 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) [2022-11-20 21:18:30,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 121 transitions. [2022-11-20 21:18:30,146 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 121 transitions. Word has length 16 [2022-11-20 21:18:30,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:30,146 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 121 transitions. [2022-11-20 21:18:30,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:30,146 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 121 transitions. [2022-11-20 21:18:30,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 21:18:30,147 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:30,147 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:18:30,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 21:18:30,147 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-11-20 21:18:30,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:30,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1362596166, now seen corresponding path program 1 times [2022-11-20 21:18:30,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:30,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594404639] [2022-11-20 21:18:30,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:30,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:30,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:30,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:18:30,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:30,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594404639] [2022-11-20 21:18:30,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594404639] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:18:30,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:18:30,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:18:30,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477641267] [2022-11-20 21:18:30,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:18:30,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:18:30,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:30,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:18:30,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:18:30,291 INFO L87 Difference]: Start difference. First operand 115 states and 121 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:30,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:30,527 INFO L93 Difference]: Finished difference Result 172 states and 181 transitions. [2022-11-20 21:18:30,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:18:30,528 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-20 21:18:30,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:30,529 INFO L225 Difference]: With dead ends: 172 [2022-11-20 21:18:30,529 INFO L226 Difference]: Without dead ends: 172 [2022-11-20 21:18:30,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:18:30,530 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 296 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:30,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 112 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:18:30,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-20 21:18:30,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 113. [2022-11-20 21:18:30,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 112 states have internal predecessors, (119), 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) [2022-11-20 21:18:30,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 119 transitions. [2022-11-20 21:18:30,533 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 119 transitions. Word has length 19 [2022-11-20 21:18:30,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:30,534 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 119 transitions. [2022-11-20 21:18:30,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:30,534 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 119 transitions. [2022-11-20 21:18:30,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 21:18:30,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:30,535 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:18:30,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 21:18:30,535 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-11-20 21:18:30,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:30,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1362596165, now seen corresponding path program 1 times [2022-11-20 21:18:30,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:30,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223970125] [2022-11-20 21:18:30,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:30,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:30,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:30,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:18:30,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:30,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223970125] [2022-11-20 21:18:30,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223970125] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:18:30,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:18:30,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:18:30,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383665420] [2022-11-20 21:18:30,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:18:30,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:18:30,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:30,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:18:30,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:18:30,787 INFO L87 Difference]: Start difference. First operand 113 states and 119 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:31,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:31,109 INFO L93 Difference]: Finished difference Result 178 states and 188 transitions. [2022-11-20 21:18:31,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:18:31,110 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-20 21:18:31,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:31,111 INFO L225 Difference]: With dead ends: 178 [2022-11-20 21:18:31,111 INFO L226 Difference]: Without dead ends: 178 [2022-11-20 21:18:31,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 21:18:31,112 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 287 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:31,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 221 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 21:18:31,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-11-20 21:18:31,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 120. [2022-11-20 21:18:31,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 67 states have (on average 1.9701492537313432) internal successors, (132), 119 states have internal predecessors, (132), 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) [2022-11-20 21:18:31,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2022-11-20 21:18:31,131 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 19 [2022-11-20 21:18:31,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:31,131 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2022-11-20 21:18:31,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:31,132 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2022-11-20 21:18:31,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 21:18:31,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:31,133 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:18:31,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 21:18:31,133 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr68REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-11-20 21:18:31,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:31,134 INFO L85 PathProgramCache]: Analyzing trace with hash 709194475, now seen corresponding path program 1 times [2022-11-20 21:18:31,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:31,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159499031] [2022-11-20 21:18:31,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:31,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:31,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:31,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:18:31,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:31,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159499031] [2022-11-20 21:18:31,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159499031] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:18:31,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:18:31,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:18:31,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75299624] [2022-11-20 21:18:31,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:18:31,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:18:31,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:31,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:18:31,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:18:31,257 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:31,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:31,494 INFO L93 Difference]: Finished difference Result 139 states and 152 transitions. [2022-11-20 21:18:31,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:18:31,495 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-20 21:18:31,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:31,496 INFO L225 Difference]: With dead ends: 139 [2022-11-20 21:18:31,496 INFO L226 Difference]: Without dead ends: 139 [2022-11-20 21:18:31,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:18:31,497 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 229 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:31,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 99 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:18:31,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-20 21:18:31,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 117. [2022-11-20 21:18:31,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 68 states have (on average 1.911764705882353) internal successors, (130), 116 states have internal predecessors, (130), 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) [2022-11-20 21:18:31,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 130 transitions. [2022-11-20 21:18:31,502 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 130 transitions. Word has length 20 [2022-11-20 21:18:31,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:31,503 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 130 transitions. [2022-11-20 21:18:31,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:31,503 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 130 transitions. [2022-11-20 21:18:31,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 21:18:31,504 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:31,504 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:18:31,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-20 21:18:31,504 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr69REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-11-20 21:18:31,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:31,505 INFO L85 PathProgramCache]: Analyzing trace with hash 709194476, now seen corresponding path program 1 times [2022-11-20 21:18:31,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:31,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122624428] [2022-11-20 21:18:31,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:31,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:31,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:31,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:18:31,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:31,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122624428] [2022-11-20 21:18:31,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122624428] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:18:31,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:18:31,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:18:31,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984825236] [2022-11-20 21:18:31,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:18:31,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:18:31,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:31,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:18:31,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:18:31,711 INFO L87 Difference]: Start difference. First operand 117 states and 130 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:32,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:32,045 INFO L93 Difference]: Finished difference Result 168 states and 179 transitions. [2022-11-20 21:18:32,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:18:32,046 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-20 21:18:32,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:32,047 INFO L225 Difference]: With dead ends: 168 [2022-11-20 21:18:32,047 INFO L226 Difference]: Without dead ends: 168 [2022-11-20 21:18:32,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 21:18:32,048 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 254 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:32,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 199 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 21:18:32,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-20 21:18:32,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 128. [2022-11-20 21:18:32,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 79 states have (on average 1.8734177215189873) internal successors, (148), 127 states have internal predecessors, (148), 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) [2022-11-20 21:18:32,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 148 transitions. [2022-11-20 21:18:32,053 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 148 transitions. Word has length 20 [2022-11-20 21:18:32,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:32,053 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 148 transitions. [2022-11-20 21:18:32,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:32,053 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 148 transitions. [2022-11-20 21:18:32,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 21:18:32,054 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:32,054 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:18:32,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-20 21:18:32,056 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-11-20 21:18:32,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:32,056 INFO L85 PathProgramCache]: Analyzing trace with hash 709198149, now seen corresponding path program 1 times [2022-11-20 21:18:32,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:32,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300005273] [2022-11-20 21:18:32,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:32,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:32,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:18:32,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:32,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300005273] [2022-11-20 21:18:32,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300005273] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:18:32,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:18:32,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-11-20 21:18:32,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235742915] [2022-11-20 21:18:32,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:18:32,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 21:18:32,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:32,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 21:18:32,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-11-20 21:18:32,920 INFO L87 Difference]: Start difference. First operand 128 states and 148 transitions. Second operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:33,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:33,989 INFO L93 Difference]: Finished difference Result 193 states and 211 transitions. [2022-11-20 21:18:33,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 21:18:33,990 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-20 21:18:33,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:33,991 INFO L225 Difference]: With dead ends: 193 [2022-11-20 21:18:33,992 INFO L226 Difference]: Without dead ends: 193 [2022-11-20 21:18:33,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-11-20 21:18:33,993 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 337 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:33,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 695 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 21:18:33,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-11-20 21:18:33,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 125. [2022-11-20 21:18:33,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 80 states have (on average 1.8125) internal successors, (145), 124 states have internal predecessors, (145), 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) [2022-11-20 21:18:33,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 145 transitions. [2022-11-20 21:18:33,997 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 145 transitions. Word has length 20 [2022-11-20 21:18:33,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:33,998 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 145 transitions. [2022-11-20 21:18:33,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:33,998 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 145 transitions. [2022-11-20 21:18:33,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 21:18:33,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:33,999 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:18:33,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-20 21:18:33,999 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-11-20 21:18:33,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:34,000 INFO L85 PathProgramCache]: Analyzing trace with hash 709198150, now seen corresponding path program 1 times [2022-11-20 21:18:34,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:34,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174182275] [2022-11-20 21:18:34,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:34,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:34,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:35,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:18:35,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:35,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174182275] [2022-11-20 21:18:35,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174182275] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:18:35,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:18:35,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-11-20 21:18:35,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487745088] [2022-11-20 21:18:35,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:18:35,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 21:18:35,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:35,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 21:18:35,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-11-20 21:18:35,494 INFO L87 Difference]: Start difference. First operand 125 states and 145 transitions. Second operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:36,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:36,771 INFO L93 Difference]: Finished difference Result 250 states and 275 transitions. [2022-11-20 21:18:36,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 21:18:36,772 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-20 21:18:36,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:36,775 INFO L225 Difference]: With dead ends: 250 [2022-11-20 21:18:36,776 INFO L226 Difference]: Without dead ends: 250 [2022-11-20 21:18:36,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2022-11-20 21:18:36,778 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 434 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:36,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 724 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 21:18:36,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-11-20 21:18:36,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 150. [2022-11-20 21:18:36,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 105 states have (on average 1.8857142857142857) internal successors, (198), 149 states have internal predecessors, (198), 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) [2022-11-20 21:18:36,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 198 transitions. [2022-11-20 21:18:36,792 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 198 transitions. Word has length 20 [2022-11-20 21:18:36,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:36,793 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 198 transitions. [2022-11-20 21:18:36,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:36,794 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 198 transitions. [2022-11-20 21:18:36,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 21:18:36,795 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:36,796 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:18:36,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-20 21:18:36,797 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr81ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-11-20 21:18:36,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:36,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1363903612, now seen corresponding path program 1 times [2022-11-20 21:18:36,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:36,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041143811] [2022-11-20 21:18:36,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:36,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:36,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:36,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:18:36,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:36,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041143811] [2022-11-20 21:18:36,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041143811] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:18:36,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:18:36,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:18:36,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150393609] [2022-11-20 21:18:36,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:18:36,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:18:36,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:36,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:18:36,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:18:36,939 INFO L87 Difference]: Start difference. First operand 150 states and 198 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:37,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:37,085 INFO L93 Difference]: Finished difference Result 150 states and 197 transitions. [2022-11-20 21:18:37,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:18:37,086 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-20 21:18:37,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:37,088 INFO L225 Difference]: With dead ends: 150 [2022-11-20 21:18:37,088 INFO L226 Difference]: Without dead ends: 150 [2022-11-20 21:18:37,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-20 21:18:37,090 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 235 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:37,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 137 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:18:37,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-20 21:18:37,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2022-11-20 21:18:37,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 105 states have (on average 1.8761904761904762) internal successors, (197), 148 states have internal predecessors, (197), 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) [2022-11-20 21:18:37,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 197 transitions. [2022-11-20 21:18:37,096 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 197 transitions. Word has length 22 [2022-11-20 21:18:37,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:37,096 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 197 transitions. [2022-11-20 21:18:37,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:37,097 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 197 transitions. [2022-11-20 21:18:37,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 21:18:37,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:37,098 INFO L195 NwaCegarLoop]: 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] [2022-11-20 21:18:37,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-20 21:18:37,098 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr82ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-11-20 21:18:37,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:37,099 INFO L85 PathProgramCache]: Analyzing trace with hash 668661263, now seen corresponding path program 1 times [2022-11-20 21:18:37,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:37,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920549964] [2022-11-20 21:18:37,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:37,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:37,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:37,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:18:37,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:37,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920549964] [2022-11-20 21:18:37,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920549964] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:18:37,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:18:37,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:18:37,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734966553] [2022-11-20 21:18:37,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:18:37,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:18:37,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:37,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:18:37,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:18:37,221 INFO L87 Difference]: Start difference. First operand 149 states and 197 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:37,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:37,344 INFO L93 Difference]: Finished difference Result 148 states and 196 transitions. [2022-11-20 21:18:37,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:18:37,351 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-20 21:18:37,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:37,354 INFO L225 Difference]: With dead ends: 148 [2022-11-20 21:18:37,354 INFO L226 Difference]: Without dead ends: 148 [2022-11-20 21:18:37,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:18:37,356 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 206 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:37,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 131 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:18:37,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-20 21:18:37,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-11-20 21:18:37,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 105 states have (on average 1.8666666666666667) internal successors, (196), 147 states have internal predecessors, (196), 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) [2022-11-20 21:18:37,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 196 transitions. [2022-11-20 21:18:37,362 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 196 transitions. Word has length 23 [2022-11-20 21:18:37,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:37,363 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 196 transitions. [2022-11-20 21:18:37,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:37,363 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 196 transitions. [2022-11-20 21:18:37,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 21:18:37,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:37,370 INFO L195 NwaCegarLoop]: 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] [2022-11-20 21:18:37,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-20 21:18:37,370 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr74REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-11-20 21:18:37,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:37,371 INFO L85 PathProgramCache]: Analyzing trace with hash -746264715, now seen corresponding path program 1 times [2022-11-20 21:18:37,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:37,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623186840] [2022-11-20 21:18:37,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:37,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:37,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:38,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:18:38,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:38,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623186840] [2022-11-20 21:18:38,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623186840] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:18:38,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:18:38,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-11-20 21:18:38,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450370910] [2022-11-20 21:18:38,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:18:38,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 21:18:38,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:38,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 21:18:38,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-11-20 21:18:38,254 INFO L87 Difference]: Start difference. First operand 148 states and 196 transitions. Second operand has 17 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:38,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:38,999 INFO L93 Difference]: Finished difference Result 190 states and 237 transitions. [2022-11-20 21:18:39,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 21:18:39,000 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-20 21:18:39,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:39,001 INFO L225 Difference]: With dead ends: 190 [2022-11-20 21:18:39,001 INFO L226 Difference]: Without dead ends: 190 [2022-11-20 21:18:39,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-11-20 21:18:39,002 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 173 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:39,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 590 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 21:18:39,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-11-20 21:18:39,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 152. [2022-11-20 21:18:39,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 109 states have (on average 1.853211009174312) internal successors, (202), 151 states have internal predecessors, (202), 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) [2022-11-20 21:18:39,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 202 transitions. [2022-11-20 21:18:39,009 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 202 transitions. Word has length 24 [2022-11-20 21:18:39,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:39,009 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 202 transitions. [2022-11-20 21:18:39,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:39,009 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 202 transitions. [2022-11-20 21:18:39,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 21:18:39,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:39,010 INFO L195 NwaCegarLoop]: 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] [2022-11-20 21:18:39,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-20 21:18:39,010 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr75REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-11-20 21:18:39,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:39,011 INFO L85 PathProgramCache]: Analyzing trace with hash -746264714, now seen corresponding path program 1 times [2022-11-20 21:18:39,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:39,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339922105] [2022-11-20 21:18:39,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:39,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:39,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:40,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:18:40,449 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:40,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339922105] [2022-11-20 21:18:40,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339922105] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:18:40,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:18:40,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-11-20 21:18:40,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985336827] [2022-11-20 21:18:40,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:18:40,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 21:18:40,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:40,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 21:18:40,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-11-20 21:18:40,451 INFO L87 Difference]: Start difference. First operand 152 states and 202 transitions. Second operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:41,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:41,757 INFO L93 Difference]: Finished difference Result 189 states and 236 transitions. [2022-11-20 21:18:41,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 21:18:41,758 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-20 21:18:41,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:41,759 INFO L225 Difference]: With dead ends: 189 [2022-11-20 21:18:41,759 INFO L226 Difference]: Without dead ends: 189 [2022-11-20 21:18:41,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2022-11-20 21:18:41,761 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 165 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:41,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 661 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 21:18:41,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-11-20 21:18:41,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 152. [2022-11-20 21:18:41,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 109 states have (on average 1.8440366972477065) internal successors, (201), 151 states have internal predecessors, (201), 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) [2022-11-20 21:18:41,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 201 transitions. [2022-11-20 21:18:41,765 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 201 transitions. Word has length 24 [2022-11-20 21:18:41,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:41,765 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 201 transitions. [2022-11-20 21:18:41,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:41,766 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 201 transitions. [2022-11-20 21:18:41,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 21:18:41,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:41,767 INFO L195 NwaCegarLoop]: 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] [2022-11-20 21:18:41,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-20 21:18:41,767 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-11-20 21:18:41,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:41,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1646506424, now seen corresponding path program 1 times [2022-11-20 21:18:41,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:41,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469101212] [2022-11-20 21:18:41,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:41,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:41,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:18:41,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:41,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469101212] [2022-11-20 21:18:41,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469101212] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:18:41,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:18:41,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:18:41,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870193434] [2022-11-20 21:18:41,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:18:41,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:18:41,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:41,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:18:41,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:18:41,852 INFO L87 Difference]: Start difference. First operand 152 states and 201 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:42,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:42,028 INFO L93 Difference]: Finished difference Result 171 states and 217 transitions. [2022-11-20 21:18:42,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:18:42,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-20 21:18:42,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:42,032 INFO L225 Difference]: With dead ends: 171 [2022-11-20 21:18:42,033 INFO L226 Difference]: Without dead ends: 171 [2022-11-20 21:18:42,033 INFO L412 NwaCegarLoop]: 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 [2022-11-20 21:18:42,034 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 146 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:42,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 110 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:18:42,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-11-20 21:18:42,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 150. [2022-11-20 21:18:42,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 111 states have (on average 1.7747747747747749) internal successors, (197), 149 states have internal predecessors, (197), 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) [2022-11-20 21:18:42,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 197 transitions. [2022-11-20 21:18:42,047 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 197 transitions. Word has length 24 [2022-11-20 21:18:42,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:42,048 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 197 transitions. [2022-11-20 21:18:42,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:42,048 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 197 transitions. [2022-11-20 21:18:42,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 21:18:42,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:42,050 INFO L195 NwaCegarLoop]: 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] [2022-11-20 21:18:42,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-20 21:18:42,051 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-11-20 21:18:42,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:42,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1646506423, now seen corresponding path program 1 times [2022-11-20 21:18:42,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:42,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168481615] [2022-11-20 21:18:42,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:42,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:42,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:43,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:18:43,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:43,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168481615] [2022-11-20 21:18:43,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168481615] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:18:43,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:18:43,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-20 21:18:43,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919296557] [2022-11-20 21:18:43,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:18:43,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 21:18:43,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:43,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 21:18:43,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-11-20 21:18:43,219 INFO L87 Difference]: Start difference. First operand 150 states and 197 transitions. Second operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:44,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:44,567 INFO L93 Difference]: Finished difference Result 277 states and 308 transitions. [2022-11-20 21:18:44,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 21:18:44,568 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-20 21:18:44,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:44,569 INFO L225 Difference]: With dead ends: 277 [2022-11-20 21:18:44,569 INFO L226 Difference]: Without dead ends: 277 [2022-11-20 21:18:44,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2022-11-20 21:18:44,570 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 562 mSDsluCounter, 1133 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 1226 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:44,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 1226 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 21:18:44,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-11-20 21:18:44,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 158. [2022-11-20 21:18:44,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 119 states have (on average 1.7647058823529411) internal successors, (210), 157 states have internal predecessors, (210), 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) [2022-11-20 21:18:44,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 210 transitions. [2022-11-20 21:18:44,585 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 210 transitions. Word has length 24 [2022-11-20 21:18:44,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:44,586 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 210 transitions. [2022-11-20 21:18:44,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:44,586 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 210 transitions. [2022-11-20 21:18:44,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 21:18:44,587 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:44,587 INFO L195 NwaCegarLoop]: 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] [2022-11-20 21:18:44,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-20 21:18:44,588 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-11-20 21:18:44,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:44,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1646499045, now seen corresponding path program 1 times [2022-11-20 21:18:44,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:44,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768350465] [2022-11-20 21:18:44,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:44,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:44,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:46,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:18:46,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:46,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768350465] [2022-11-20 21:18:46,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768350465] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:18:46,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085229179] [2022-11-20 21:18:46,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:46,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:18:46,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce0c96d-004b-4782-af42-6e4692912375/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:18:46,458 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce0c96d-004b-4782-af42-6e4692912375/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:18:46,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce0c96d-004b-4782-af42-6e4692912375/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 21:18:46,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:46,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-20 21:18:46,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:18:46,905 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 21:18:46,906 INFO L350 Elim1Store]: Elim1 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 28 treesize of output 27 [2022-11-20 21:18:47,010 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 21:18:47,058 INFO L321 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2022-11-20 21:18:47,058 INFO L350 Elim1Store]: Elim1 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 4 case distinctions, treesize of input 26 treesize of output 41 [2022-11-20 21:18:47,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:47,168 INFO L350 Elim1Store]: Elim1 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 39 treesize of output 30 [2022-11-20 21:18:47,804 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 21:18:47,804 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 81 [2022-11-20 21:18:47,835 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 20 [2022-11-20 21:18:47,972 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 21:18:47,973 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 76 [2022-11-20 21:18:48,004 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 20 [2022-11-20 21:18:48,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:48,145 INFO L321 Elim1Store]: treesize reduction 74, result has 18.7 percent of original size [2022-11-20 21:18:48,145 INFO L350 Elim1Store]: Elim1 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 94 treesize of output 61 [2022-11-20 21:18:48,156 INFO L350 Elim1Store]: Elim1 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 93 treesize of output 89 [2022-11-20 21:18:48,788 INFO L321 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2022-11-20 21:18:48,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 142 treesize of output 119 [2022-11-20 21:18:48,812 INFO L321 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2022-11-20 21:18:48,812 INFO L350 Elim1Store]: Elim1 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 95 treesize of output 91 [2022-11-20 21:18:48,920 INFO L321 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2022-11-20 21:18:48,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 112 [2022-11-20 21:18:48,948 INFO L321 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2022-11-20 21:18:48,955 INFO L350 Elim1Store]: Elim1 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 95 treesize of output 91 [2022-11-20 21:18:49,029 INFO L321 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2022-11-20 21:18:49,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 118 treesize of output 99 [2022-11-20 21:18:49,055 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-20 21:18:49,056 INFO L350 Elim1Store]: Elim1 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 91 treesize of output 87 [2022-11-20 21:18:49,335 INFO L350 Elim1Store]: Elim1 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 88 treesize of output 68 [2022-11-20 21:18:49,621 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-20 21:18:49,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 95 treesize of output 32 [2022-11-20 21:18:49,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:18:49,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:18:49,956 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1208 (Array Int Int)) (v_ArrVal_1209 (Array Int Int))) (= (select |c_#valid| (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem11#1.base| v_ArrVal_1209))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset|))) (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem11#1.base| v_ArrVal_1208) |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset|) 8))) 1)) is different from false [2022-11-20 21:18:53,164 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1208 (Array Int Int)) (v_ArrVal_1209 (Array Int Int))) (= 1 (select |c_#valid| (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) (+ |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset| 4)))) (select (let ((.cse0 (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_1209))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset|))) (+ (select (select (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_1208) |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset|) 8)))))) is different from false [2022-11-20 21:18:53,182 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1208 (Array Int Int)) (v_ArrVal_1202 (Array Int Int)) (v_ArrVal_1209 (Array Int Int))) (= (select |c_#valid| (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem7#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem7#1.base|) (+ |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem7#1.offset| 8) |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem10#1.base|)))) (let ((.cse2 (select (select .cse1 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) (+ |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset| 4)))) (select (let ((.cse0 (store .cse1 .cse2 v_ArrVal_1209))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset|))) (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem7#1.base| v_ArrVal_1202) .cse2 v_ArrVal_1208) |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset|) 8))))) 1)) is different from false [2022-11-20 21:18:53,204 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1208 (Array Int Int)) (v_ArrVal_1202 (Array Int Int)) (v_ArrVal_1200 (Array Int Int)) (v_ArrVal_1199 (Array Int Int)) (v_ArrVal_1209 (Array Int Int))) (= (select |c_#valid| (let ((.cse1 (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem8#1.base| v_ArrVal_1200))) (store .cse3 |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem7#1.base| (store (select .cse3 |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem7#1.base|) (+ |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem7#1.offset| 8) |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem10#1.base|))))) (let ((.cse2 (select (select .cse1 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) (+ |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset| 4)))) (select (let ((.cse0 (store .cse1 .cse2 v_ArrVal_1209))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset|))) (+ 8 (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem8#1.base| v_ArrVal_1199) |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem7#1.base| v_ArrVal_1202) .cse2 v_ArrVal_1208) |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset|)))))) 1)) is different from false [2022-11-20 21:18:53,227 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1208 (Array Int Int)) (v_ArrVal_1202 (Array Int Int)) (v_ArrVal_1200 (Array Int Int)) (v_ArrVal_1199 (Array Int Int)) (v_ArrVal_1198 (Array Int Int)) (v_ArrVal_1197 (Array Int Int)) (v_ArrVal_1209 (Array Int Int))) (= (select |c_#valid| (let ((.cse1 (let ((.cse3 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem9#1.base| v_ArrVal_1198) |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem8#1.base| v_ArrVal_1200))) (store .cse3 |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem7#1.base| (store (select .cse3 |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem7#1.base|) (+ |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem7#1.offset| 8) |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem10#1.base|))))) (let ((.cse2 (select (select .cse1 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) (+ |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset| 4)))) (select (let ((.cse0 (store .cse1 .cse2 v_ArrVal_1209))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset|))) (+ (select (select (store (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem9#1.base| v_ArrVal_1197) |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem8#1.base| v_ArrVal_1199) |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem7#1.base| v_ArrVal_1202) .cse2 v_ArrVal_1208) |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset|) 8))))) 1)) is different from false [2022-11-20 21:18:53,252 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1208 (Array Int Int)) (v_ArrVal_1202 (Array Int Int)) (v_ArrVal_1200 (Array Int Int)) (v_ArrVal_1199 (Array Int Int)) (v_ArrVal_1198 (Array Int Int)) (v_ArrVal_1197 (Array Int Int)) (v_ArrVal_1209 (Array Int Int))) (= (select |c_#valid| (let ((.cse3 (+ |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset| 4))) (let ((.cse1 (let ((.cse4 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem9#1.base| v_ArrVal_1198) |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem8#1.base| v_ArrVal_1200))) (store .cse4 |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem7#1.base| (store (select .cse4 |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem7#1.base|) (+ |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem7#1.offset| 8) (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) .cse3)))))) (let ((.cse2 (select (select .cse1 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) .cse3))) (select (let ((.cse0 (store .cse1 .cse2 v_ArrVal_1209))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset|))) (+ (select (select (store (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem9#1.base| v_ArrVal_1197) |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem8#1.base| v_ArrVal_1199) |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem7#1.base| v_ArrVal_1202) .cse2 v_ArrVal_1208) |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset|) 8)))))) 1)) is different from false [2022-11-20 21:18:53,279 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1208 (Array Int Int)) (v_ArrVal_1202 (Array Int Int)) (v_ArrVal_1200 (Array Int Int)) (v_ArrVal_1199 (Array Int Int)) (v_ArrVal_1198 (Array Int Int)) (v_ArrVal_1197 (Array Int Int)) (v_ArrVal_1209 (Array Int Int))) (= (select |c_#valid| (let ((.cse6 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|))) (let ((.cse4 (+ |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset| 4)) (.cse3 (select .cse6 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset|))) (let ((.cse1 (let ((.cse5 (store (store |c_#memory_$Pointer$.base| .cse3 v_ArrVal_1198) |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem8#1.base| v_ArrVal_1200))) (store .cse5 |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem7#1.base| (store (select .cse5 |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem7#1.base|) (+ |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem7#1.offset| 8) (select .cse6 .cse4)))))) (let ((.cse2 (select (select .cse1 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) .cse4))) (select (let ((.cse0 (store .cse1 .cse2 v_ArrVal_1209))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset|))) (+ (select (select (store (store (store (store |c_#memory_$Pointer$.offset| .cse3 v_ArrVal_1197) |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem8#1.base| v_ArrVal_1199) |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem7#1.base| v_ArrVal_1202) .cse2 v_ArrVal_1208) |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset|) 8))))))) 1)) is different from false [2022-11-20 21:18:53,313 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1208 (Array Int Int)) (v_ArrVal_1202 (Array Int Int)) (v_ArrVal_1200 (Array Int Int)) (v_ArrVal_1199 (Array Int Int)) (v_ArrVal_1209 (Array Int Int))) (= (select |c_#valid| (let ((.cse6 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|))) (let ((.cse4 (+ |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset| 4)) (.cse3 (select .cse6 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset|))) (let ((.cse1 (let ((.cse5 (store |c_#memory_$Pointer$.base| .cse3 v_ArrVal_1200))) (store .cse5 |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem7#1.base| (store (select .cse5 |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem7#1.base|) (+ |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem7#1.offset| 8) (select .cse6 .cse4)))))) (let ((.cse2 (select (select .cse1 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) .cse4))) (select (let ((.cse0 (store .cse1 .cse2 v_ArrVal_1209))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset|))) (+ 8 (select (select (store (store (store |c_#memory_$Pointer$.offset| .cse3 v_ArrVal_1199) |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~mem7#1.base| v_ArrVal_1202) .cse2 v_ArrVal_1208) |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset|)))))))) 1)) is different from false [2022-11-20 21:18:53,325 INFO L350 Elim1Store]: Elim1 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 1258 treesize of output 1098 [2022-11-20 21:18:53,336 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:18:53,336 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 1098 treesize of output 694 [2022-11-20 21:18:53,348 INFO L350 Elim1Store]: Elim1 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 340 treesize of output 336 [2022-11-20 21:18:53,360 INFO L350 Elim1Store]: Elim1 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 676 treesize of output 668 [2022-11-20 21:18:53,789 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse31 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|))) (let ((.cse5 (select .cse31 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset|))) (let ((.cse4 (+ |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset| 4)) (.cse10 (= .cse5 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|))) (let ((.cse23 (not .cse10)) (.cse1 (select .cse31 .cse4))) (and (forall ((v_arrayElimArr_1 (Array Int Int)) (v_arrayElimCell_26 Int)) (let ((.cse3 (store |c_#memory_$Pointer$.base| .cse5 v_arrayElimArr_1))) (let ((.cse0 (select (select .cse3 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) .cse4))) (or (not (= .cse0 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|)) (not (= (select v_arrayElimArr_1 (+ 8 v_arrayElimCell_26)) .cse1)) (forall ((v_arrayElimCell_28 Int) (v_ArrVal_1209 (Array Int Int))) (= (select |c_#valid| (select (let ((.cse2 (store .cse3 .cse0 v_ArrVal_1209))) (select .cse2 (select (select .cse2 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset|))) (+ 8 v_arrayElimCell_28))) 1)))))) (or (forall ((v_arrayElimArr_1 (Array Int Int)) (v_arrayElimCell_28 Int) (v_arrayElimCell_26 Int) (v_ArrVal_1209 (Array Int Int))) (let ((.cse6 (+ 8 v_arrayElimCell_26)) (.cse7 (let ((.cse8 (let ((.cse9 (store |c_#memory_$Pointer$.base| .cse5 v_arrayElimArr_1))) (store .cse9 (select (select .cse9 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) .cse4) v_ArrVal_1209)))) (select .cse8 (select (select .cse8 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset|))))) (or (not (= (select v_arrayElimArr_1 .cse6) .cse1)) (= (select |c_#valid| (select .cse7 .cse6)) 1) (= (select |c_#valid| (select .cse7 (+ 8 v_arrayElimCell_28))) 1)))) .cse10) (forall ((v_arrayElimArr_1 (Array Int Int)) (v_arrayElimCell_26 Int)) (let ((.cse12 (+ 8 v_arrayElimCell_26))) (or (forall ((v_arrayElimCell_28 Int) (v_ArrVal_1209 (Array Int Int))) (let ((.cse11 (let ((.cse13 (let ((.cse14 (store |c_#memory_$Pointer$.base| .cse5 v_arrayElimArr_1))) (store .cse14 (select (select .cse14 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) .cse4) v_ArrVal_1209)))) (select .cse13 (select (select .cse13 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset|))))) (or (= (select |c_#valid| (select .cse11 .cse12)) 1) (= (select |c_#valid| (select .cse11 (+ 8 v_arrayElimCell_28))) 1) (forall ((v_arrayElimCell_27 Int)) (= (select |c_#valid| (select .cse11 (+ 8 v_arrayElimCell_27))) 1))))) (not (= (select v_arrayElimArr_1 .cse12) .cse1))))) (forall ((v_arrayElimArr_1 (Array Int Int))) (let ((.cse19 (store |c_#memory_$Pointer$.base| .cse5 v_arrayElimArr_1))) (let ((.cse15 (select (select .cse19 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) .cse4))) (or (= .cse15 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) (forall ((v_arrayElimCell_26 Int)) (let ((.cse17 (+ 8 v_arrayElimCell_26))) (or (forall ((v_ArrVal_1209 (Array Int Int))) (let ((.cse16 (let ((.cse18 (store .cse19 .cse15 v_ArrVal_1209))) (select .cse18 (select (select .cse18 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset|))))) (or (= (select |c_#valid| (select .cse16 .cse17)) 1) (forall ((v_arrayElimCell_27 Int)) (= (select |c_#valid| (select .cse16 (+ 8 v_arrayElimCell_27))) 1))))) (not (= (select v_arrayElimArr_1 .cse17) .cse1))))))))) (or (forall ((v_arrayElimArr_1 (Array Int Int)) (v_arrayElimCell_28 Int) (v_arrayElimCell_27 Int) (v_arrayElimCell_26 Int) (v_ArrVal_1209 (Array Int Int))) (let ((.cse20 (let ((.cse21 (let ((.cse22 (store |c_#memory_$Pointer$.base| .cse5 v_arrayElimArr_1))) (store .cse22 (select (select .cse22 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) .cse4) v_ArrVal_1209)))) (select .cse21 (select (select .cse21 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset|))))) (or (not (= (select v_arrayElimArr_1 (+ 8 v_arrayElimCell_26)) .cse1)) (= (select |c_#valid| (select .cse20 (+ 8 v_arrayElimCell_27))) 1) (= (select |c_#valid| (select .cse20 (+ 8 v_arrayElimCell_28))) 1)))) .cse23) (or (forall ((v_arrayElimArr_1 (Array Int Int)) (v_arrayElimCell_27 Int) (v_arrayElimCell_26 Int) (v_ArrVal_1209 (Array Int Int))) (let ((.cse26 (store |c_#memory_$Pointer$.base| .cse5 v_arrayElimArr_1))) (let ((.cse24 (select (select .cse26 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) .cse4))) (or (not (= (select v_arrayElimArr_1 (+ 8 v_arrayElimCell_26)) .cse1)) (= .cse24 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) (= (select |c_#valid| (select (let ((.cse25 (store .cse26 .cse24 v_ArrVal_1209))) (select .cse25 (select (select .cse25 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset|))) (+ 8 v_arrayElimCell_27))) 1))))) .cse23) (or .cse10 (forall ((v_arrayElimArr_1 (Array Int Int)) (v_arrayElimCell_26 Int) (v_ArrVal_1209 (Array Int Int))) (let ((.cse29 (store |c_#memory_$Pointer$.base| .cse5 v_arrayElimArr_1))) (let ((.cse27 (+ 8 v_arrayElimCell_26)) (.cse30 (select (select .cse29 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) .cse4))) (or (not (= (select v_arrayElimArr_1 .cse27) .cse1)) (= (select |c_#valid| (select (let ((.cse28 (store .cse29 .cse30 v_ArrVal_1209))) (select .cse28 (select (select .cse28 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset|))) .cse27)) 1) (= .cse30 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|))))))))))) is different from false [2022-11-20 21:18:54,016 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse31 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|))) (let ((.cse6 (select .cse31 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset|))) (let ((.cse4 (+ |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset| 4)) (.cse11 (= .cse6 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|))) (let ((.cse7 (not .cse11)) (.cse5 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base| (store .cse31 .cse4 |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~malloc6#1.base|)))) (and (forall ((v_arrayElimArr_1 (Array Int Int)) (v_arrayElimCell_26 Int)) (let ((.cse0 (+ 8 v_arrayElimCell_26))) (or (not (= (select v_arrayElimArr_1 .cse0) |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~malloc6#1.base|)) (forall ((v_arrayElimCell_28 Int) (v_ArrVal_1209 (Array Int Int))) (let ((.cse1 (let ((.cse2 (let ((.cse3 (store .cse5 .cse6 v_arrayElimArr_1))) (store .cse3 (select (select .cse3 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) .cse4) v_ArrVal_1209)))) (select .cse2 (select (select .cse2 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset|))))) (or (= (select |c_#valid| (select .cse1 .cse0)) 1) (forall ((v_arrayElimCell_27 Int)) (= (select |c_#valid| (select .cse1 (+ 8 v_arrayElimCell_27))) 1)) (= (select |c_#valid| (select .cse1 (+ 8 v_arrayElimCell_28))) 1))))))) (or .cse7 (forall ((v_arrayElimArr_1 (Array Int Int)) (v_arrayElimCell_27 Int) (v_arrayElimCell_26 Int) (v_ArrVal_1209 (Array Int Int))) (let ((.cse10 (store .cse5 .cse6 v_arrayElimArr_1))) (let ((.cse8 (select (select .cse10 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) .cse4))) (or (= .cse8 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) (= (select |c_#valid| (select (let ((.cse9 (store .cse10 .cse8 v_ArrVal_1209))) (select .cse9 (select (select .cse9 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset|))) (+ 8 v_arrayElimCell_27))) 1) (not (= (select v_arrayElimArr_1 (+ 8 v_arrayElimCell_26)) |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~malloc6#1.base|))))))) (or .cse11 (forall ((v_arrayElimArr_1 (Array Int Int)) (v_arrayElimCell_26 Int) (v_ArrVal_1209 (Array Int Int))) (let ((.cse14 (store .cse5 .cse6 v_arrayElimArr_1))) (let ((.cse12 (select (select .cse14 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) .cse4)) (.cse15 (+ 8 v_arrayElimCell_26))) (or (= .cse12 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) (= (select |c_#valid| (select (let ((.cse13 (store .cse14 .cse12 v_ArrVal_1209))) (select .cse13 (select (select .cse13 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset|))) .cse15)) 1) (not (= (select v_arrayElimArr_1 .cse15) |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~malloc6#1.base|))))))) (forall ((v_arrayElimArr_1 (Array Int Int))) (let ((.cse20 (store .cse5 .cse6 v_arrayElimArr_1))) (let ((.cse16 (select (select .cse20 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) .cse4))) (or (= .cse16 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) (forall ((v_arrayElimCell_26 Int)) (let ((.cse18 (+ 8 v_arrayElimCell_26))) (or (forall ((v_ArrVal_1209 (Array Int Int))) (let ((.cse17 (let ((.cse19 (store .cse20 .cse16 v_ArrVal_1209))) (select .cse19 (select (select .cse19 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset|))))) (or (= (select |c_#valid| (select .cse17 .cse18)) 1) (forall ((v_arrayElimCell_27 Int)) (= (select |c_#valid| (select .cse17 (+ 8 v_arrayElimCell_27))) 1))))) (not (= (select v_arrayElimArr_1 .cse18) |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~malloc6#1.base|))))))))) (or .cse7 (forall ((v_arrayElimArr_1 (Array Int Int)) (v_arrayElimCell_28 Int) (v_arrayElimCell_27 Int) (v_arrayElimCell_26 Int) (v_ArrVal_1209 (Array Int Int))) (let ((.cse21 (let ((.cse22 (let ((.cse23 (store .cse5 .cse6 v_arrayElimArr_1))) (store .cse23 (select (select .cse23 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) .cse4) v_ArrVal_1209)))) (select .cse22 (select (select .cse22 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset|))))) (or (= (select |c_#valid| (select .cse21 (+ 8 v_arrayElimCell_27))) 1) (not (= (select v_arrayElimArr_1 (+ 8 v_arrayElimCell_26)) |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~malloc6#1.base|)) (= (select |c_#valid| (select .cse21 (+ 8 v_arrayElimCell_28))) 1))))) (forall ((v_arrayElimArr_1 (Array Int Int)) (v_arrayElimCell_26 Int)) (let ((.cse26 (store .cse5 .cse6 v_arrayElimArr_1))) (let ((.cse24 (select (select .cse26 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) .cse4))) (or (not (= .cse24 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|)) (forall ((v_arrayElimCell_28 Int) (v_ArrVal_1209 (Array Int Int))) (= (select |c_#valid| (select (let ((.cse25 (store .cse26 .cse24 v_ArrVal_1209))) (select .cse25 (select (select .cse25 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset|))) (+ 8 v_arrayElimCell_28))) 1)) (not (= (select v_arrayElimArr_1 (+ 8 v_arrayElimCell_26)) |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~malloc6#1.base|)))))) (or (forall ((v_arrayElimArr_1 (Array Int Int)) (v_arrayElimCell_28 Int) (v_arrayElimCell_26 Int) (v_ArrVal_1209 (Array Int Int))) (let ((.cse28 (+ 8 v_arrayElimCell_26)) (.cse27 (let ((.cse29 (let ((.cse30 (store .cse5 .cse6 v_arrayElimArr_1))) (store .cse30 (select (select .cse30 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) .cse4) v_ArrVal_1209)))) (select .cse29 (select (select .cse29 |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.base|) |c_ULTIMATE.start_create_sl_with_head_and_tail_~sl~0#1.offset|))))) (or (= (select |c_#valid| (select .cse27 .cse28)) 1) (not (= (select v_arrayElimArr_1 .cse28) |c_ULTIMATE.start_create_sl_with_head_and_tail_#t~malloc6#1.base|)) (= (select |c_#valid| (select .cse27 (+ 8 v_arrayElimCell_28))) 1)))) .cse11)))))) is different from false [2022-11-20 21:18:54,193 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:18:54,194 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 1379 treesize of output 722 [2022-11-20 21:20:32,859 WARN L233 SmtUtils]: Spent 1.64m on a formula simplification. DAG size of input: 2424 DAG size of output: 1596 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-20 21:20:32,871 INFO L321 Elim1Store]: treesize reduction 3612, result has 61.0 percent of original size [2022-11-20 21:20:32,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 38 select indices, 38 select index equivalence classes, 0 disjoint index pairs (out of 703 index pairs), introduced 39 new quantified variables, introduced 703 case distinctions, treesize of input 40350 treesize of output 36034 [2022-11-20 21:20:40,665 WARN L233 SmtUtils]: Spent 7.78s on a formula simplification. DAG size of input: 2783 DAG size of output: 2782 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-20 21:20:47,774 WARN L233 SmtUtils]: Spent 6.86s on a formula simplification. DAG size of input: 2751 DAG size of output: 2751 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-20 21:20:48,747 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:20:48,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 30066 treesize of output 29426 [2022-11-20 21:20:52,443 INFO L217 Elim1Store]: Index analysis took 101 ms [2022-11-20 21:20:52,941 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:20:52,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 29468 treesize of output 29246 [2022-11-20 21:20:56,817 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:20:56,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28734 treesize of output 28382 [2022-11-20 21:21:00,771 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:21:00,773 INFO L350 Elim1Store]: Elim1 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 28384 treesize of output 28254 [2022-11-20 21:21:05,102 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:21:05,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28600 treesize of output 27152 [2022-11-20 21:21:08,922 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:21:08,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26890 treesize of output 26470 [2022-11-20 21:21:12,949 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:21:12,952 INFO L350 Elim1Store]: Elim1 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 26500 treesize of output 26330 [2022-11-20 21:21:17,288 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:21:17,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 26668 treesize of output 25324 [2022-11-20 21:21:21,294 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:21:21,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25332 treesize of output 24784 [2022-11-20 21:21:25,661 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:21:25,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24840 treesize of output 24396 [2022-11-20 21:21:29,761 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:21:29,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24440 treesize of output 24276 [2022-11-20 21:21:34,490 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:21:34,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24050 treesize of output 23698 [2022-11-20 21:21:38,387 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:21:38,389 INFO L350 Elim1Store]: Elim1 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 23700 treesize of output 23570 [2022-11-20 21:21:42,532 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:21:42,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23892 treesize of output 23472