./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/forester-heap/dll-reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a 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_e510d60e-e20e-47a5-a202-dc5d4ce4b932/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e510d60e-e20e-47a5-a202-dc5d4ce4b932/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e510d60e-e20e-47a5-a202-dc5d4ce4b932/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e510d60e-e20e-47a5-a202-dc5d4ce4b932/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/dll-reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e510d60e-e20e-47a5-a202-dc5d4ce4b932/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e510d60e-e20e-47a5-a202-dc5d4ce4b932/bin/utaipan-ByfvJB40ur --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 52fc70d7844651686a4c27e057f507f0498e7d5f7c17f07a035699d1630f6ea2 --- 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-38b53e6 [2022-11-25 22:29:49,637 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:29:49,641 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:29:49,681 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:29:49,681 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:29:49,682 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:29:49,684 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:29:49,685 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:29:49,694 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:29:49,703 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:29:49,704 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:29:49,705 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:29:49,705 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:29:49,706 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:29:49,707 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:29:49,708 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:29:49,709 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:29:49,710 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:29:49,712 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:29:49,714 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:29:49,715 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:29:49,716 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:29:49,718 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:29:49,719 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:29:49,722 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:29:49,723 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:29:49,723 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:29:49,724 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:29:49,724 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:29:49,725 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:29:49,726 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:29:49,727 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:29:49,727 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:29:49,728 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:29:49,729 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:29:49,729 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:29:49,730 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:29:49,730 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:29:49,731 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:29:49,732 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:29:49,732 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:29:49,733 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e510d60e-e20e-47a5-a202-dc5d4ce4b932/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-25 22:29:49,779 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:29:49,783 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:29:49,784 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:29:49,784 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:29:49,785 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:29:49,785 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:29:49,786 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:29:49,786 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:29:49,786 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:29:49,786 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:29:49,788 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:29:49,788 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:29:49,788 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:29:49,789 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:29:49,789 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:29:49,789 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:29:49,789 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:29:49,789 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:29:49,790 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 22:29:49,791 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 22:29:49,791 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:29:49,791 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 22:29:49,791 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 22:29:49,792 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:29:49,792 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 22:29:49,793 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:29:49,793 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 22:29:49,793 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 22:29:49,793 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 22:29:49,794 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:29:49,794 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 22:29:49,794 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 22:29:49,794 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:29:49,795 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:29:49,795 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:29:49,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:29:49,795 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:29:49,796 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:29:49,796 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:29:49,796 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:29:49,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:29:49,797 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:29:49,797 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_e510d60e-e20e-47a5-a202-dc5d4ce4b932/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e510d60e-e20e-47a5-a202-dc5d4ce4b932/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52fc70d7844651686a4c27e057f507f0498e7d5f7c17f07a035699d1630f6ea2 [2022-11-25 22:29:50,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:29:50,094 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:29:50,097 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:29:50,098 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:29:50,099 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:29:50,100 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e510d60e-e20e-47a5-a202-dc5d4ce4b932/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/forester-heap/dll-reverse.i [2022-11-25 22:29:53,290 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:29:53,536 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:29:53,536 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e510d60e-e20e-47a5-a202-dc5d4ce4b932/sv-benchmarks/c/forester-heap/dll-reverse.i [2022-11-25 22:29:53,548 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e510d60e-e20e-47a5-a202-dc5d4ce4b932/bin/utaipan-ByfvJB40ur/data/6d48ce45c/888914b05c3e47fcbf1ba61369a18b3e/FLAG74395b2fa [2022-11-25 22:29:53,563 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e510d60e-e20e-47a5-a202-dc5d4ce4b932/bin/utaipan-ByfvJB40ur/data/6d48ce45c/888914b05c3e47fcbf1ba61369a18b3e [2022-11-25 22:29:53,566 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:29:53,568 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:29:53,569 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:29:53,569 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:29:53,573 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:29:53,574 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:29:53" (1/1) ... [2022-11-25 22:29:53,575 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63713dc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:29:53, skipping insertion in model container [2022-11-25 22:29:53,575 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:29:53" (1/1) ... [2022-11-25 22:29:53,584 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:29:53,623 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:29:53,945 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e510d60e-e20e-47a5-a202-dc5d4ce4b932/sv-benchmarks/c/forester-heap/dll-reverse.i[22309,22322] [2022-11-25 22:29:53,952 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e510d60e-e20e-47a5-a202-dc5d4ce4b932/sv-benchmarks/c/forester-heap/dll-reverse.i[22394,22407] [2022-11-25 22:29:53,964 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e510d60e-e20e-47a5-a202-dc5d4ce4b932/sv-benchmarks/c/forester-heap/dll-reverse.i[22924,22937] [2022-11-25 22:29:53,975 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:29:53,988 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:29:54,039 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e510d60e-e20e-47a5-a202-dc5d4ce4b932/sv-benchmarks/c/forester-heap/dll-reverse.i[22309,22322] [2022-11-25 22:29:54,046 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e510d60e-e20e-47a5-a202-dc5d4ce4b932/sv-benchmarks/c/forester-heap/dll-reverse.i[22394,22407] [2022-11-25 22:29:54,055 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e510d60e-e20e-47a5-a202-dc5d4ce4b932/sv-benchmarks/c/forester-heap/dll-reverse.i[22924,22937] [2022-11-25 22:29:54,064 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:29:54,092 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:29:54,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:29:54 WrapperNode [2022-11-25 22:29:54,094 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:29:54,095 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:29:54,096 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:29:54,096 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:29:54,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:29:54" (1/1) ... [2022-11-25 22:29:54,131 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:29:54" (1/1) ... [2022-11-25 22:29:54,155 INFO L138 Inliner]: procedures = 119, calls = 41, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 147 [2022-11-25 22:29:54,155 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:29:54,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:29:54,156 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:29:54,156 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:29:54,166 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:29:54" (1/1) ... [2022-11-25 22:29:54,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:29:54" (1/1) ... [2022-11-25 22:29:54,170 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:29:54" (1/1) ... [2022-11-25 22:29:54,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:29:54" (1/1) ... [2022-11-25 22:29:54,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:29:54" (1/1) ... [2022-11-25 22:29:54,198 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:29:54" (1/1) ... [2022-11-25 22:29:54,200 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:29:54" (1/1) ... [2022-11-25 22:29:54,201 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:29:54" (1/1) ... [2022-11-25 22:29:54,204 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:29:54,205 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:29:54,205 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:29:54,205 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:29:54,206 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:29:54" (1/1) ... [2022-11-25 22:29:54,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:29:54,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e510d60e-e20e-47a5-a202-dc5d4ce4b932/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:29:54,242 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e510d60e-e20e-47a5-a202-dc5d4ce4b932/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:29:54,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e510d60e-e20e-47a5-a202-dc5d4ce4b932/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:29:54,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 22:29:54,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 22:29:54,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 22:29:54,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 22:29:54,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 22:29:54,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 22:29:54,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 22:29:54,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 22:29:54,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:29:54,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:29:54,403 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:29:54,405 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:29:54,980 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:29:55,056 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:29:55,056 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-25 22:29:55,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:29:55 BoogieIcfgContainer [2022-11-25 22:29:55,059 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:29:55,062 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:29:55,062 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:29:55,074 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:29:55,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:29:53" (1/3) ... [2022-11-25 22:29:55,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5306c149 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:29:55, skipping insertion in model container [2022-11-25 22:29:55,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:29:54" (2/3) ... [2022-11-25 22:29:55,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5306c149 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:29:55, skipping insertion in model container [2022-11-25 22:29:55,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:29:55" (3/3) ... [2022-11-25 22:29:55,082 INFO L112 eAbstractionObserver]: Analyzing ICFG dll-reverse.i [2022-11-25 22:29:55,097 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:29:55,097 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 69 error locations. [2022-11-25 22:29:55,170 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:29:55,180 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;@55c018d7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:29:55,180 INFO L358 AbstractCegarLoop]: Starting to check reachability of 69 error locations. [2022-11-25 22:29:55,190 INFO L276 IsEmpty]: Start isEmpty. Operand has 126 states, 56 states have (on average 2.5714285714285716) internal successors, (144), 125 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:29:55,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-25 22:29:55,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:29:55,198 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-25 22:29:55,199 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 22:29:55,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:29:55,207 INFO L85 PathProgramCache]: Analyzing trace with hash 9273, now seen corresponding path program 1 times [2022-11-25 22:29:55,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:29:55,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113929327] [2022-11-25 22:29:55,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:29:55,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:29:55,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:29:55,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:29:55,447 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:29:55,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113929327] [2022-11-25 22:29:55,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113929327] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:29:55,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:29:55,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 22:29:55,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107816725] [2022-11-25 22:29:55,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:29:55,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:29:55,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:29:55,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:29:55,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:29:55,489 INFO L87 Difference]: Start difference. First operand has 126 states, 56 states have (on average 2.5714285714285716) internal successors, (144), 125 states have internal predecessors, (144), 0 states have call successors, (0), 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) [2022-11-25 22:29:55,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:29:55,639 INFO L93 Difference]: Finished difference Result 123 states and 130 transitions. [2022-11-25 22:29:55,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:29:55,642 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 [2022-11-25 22:29:55,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:29:55,650 INFO L225 Difference]: With dead ends: 123 [2022-11-25 22:29:55,651 INFO L226 Difference]: Without dead ends: 122 [2022-11-25 22:29:55,652 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 [2022-11-25 22:29:55,656 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 85 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:29:55,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 86 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:29:55,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-25 22:29:55,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-11-25 22:29:55,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 56 states have (on average 2.3035714285714284) internal successors, (129), 121 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) [2022-11-25 22:29:55,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 129 transitions. [2022-11-25 22:29:55,694 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 129 transitions. Word has length 2 [2022-11-25 22:29:55,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:29:55,694 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 129 transitions. [2022-11-25 22:29:55,694 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) [2022-11-25 22:29:55,696 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 129 transitions. [2022-11-25 22:29:55,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-25 22:29:55,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:29:55,697 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-25 22:29:55,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 22:29:55,698 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 22:29:55,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:29:55,699 INFO L85 PathProgramCache]: Analyzing trace with hash 9274, now seen corresponding path program 1 times [2022-11-25 22:29:55,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:29:55,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944381901] [2022-11-25 22:29:55,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:29:55,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:29:55,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:29:55,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:29:55,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:29:55,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944381901] [2022-11-25 22:29:55,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944381901] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:29:55,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:29:55,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 22:29:55,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313536285] [2022-11-25 22:29:55,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:29:55,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:29:55,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:29:55,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:29:55,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:29:55,792 INFO L87 Difference]: Start difference. First operand 122 states and 129 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) [2022-11-25 22:29:55,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:29:55,919 INFO L93 Difference]: Finished difference Result 119 states and 126 transitions. [2022-11-25 22:29:55,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:29:55,920 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 [2022-11-25 22:29:55,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:29:55,921 INFO L225 Difference]: With dead ends: 119 [2022-11-25 22:29:55,921 INFO L226 Difference]: Without dead ends: 119 [2022-11-25 22:29:55,921 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 [2022-11-25 22:29:55,923 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 82 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:29:55,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 85 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:29:55,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-25 22:29:55,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-11-25 22:29:55,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 56 states have (on average 2.25) internal successors, (126), 118 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) [2022-11-25 22:29:55,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 126 transitions. [2022-11-25 22:29:55,936 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 126 transitions. Word has length 2 [2022-11-25 22:29:55,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:29:55,937 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 126 transitions. [2022-11-25 22:29:55,937 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) [2022-11-25 22:29:55,937 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 126 transitions. [2022-11-25 22:29:55,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 22:29:55,937 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:29:55,938 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:29:55,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 22:29:55,938 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 22:29:55,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:29:55,939 INFO L85 PathProgramCache]: Analyzing trace with hash -824554840, now seen corresponding path program 1 times [2022-11-25 22:29:55,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:29:55,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744170132] [2022-11-25 22:29:55,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:29:55,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:29:55,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:29:56,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:29:56,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:29:56,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744170132] [2022-11-25 22:29:56,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744170132] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:29:56,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:29:56,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 22:29:56,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189597150] [2022-11-25 22:29:56,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:29:56,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:29:56,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:29:56,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:29:56,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:29:56,145 INFO L87 Difference]: Start difference. First operand 119 states and 126 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:29:56,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:29:56,380 INFO L93 Difference]: Finished difference Result 109 states and 117 transitions. [2022-11-25 22:29:56,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:29:56,381 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-25 22:29:56,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:29:56,383 INFO L225 Difference]: With dead ends: 109 [2022-11-25 22:29:56,383 INFO L226 Difference]: Without dead ends: 109 [2022-11-25 22:29:56,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:29:56,384 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 138 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:29:56,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 55 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:29:56,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-25 22:29:56,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2022-11-25 22:29:56,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 60 states have (on average 1.95) internal successors, (117), 105 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:29:56,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2022-11-25 22:29:56,404 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 7 [2022-11-25 22:29:56,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:29:56,405 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2022-11-25 22:29:56,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:29:56,406 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2022-11-25 22:29:56,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 22:29:56,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:29:56,407 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:29:56,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 22:29:56,407 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 22:29:56,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:29:56,408 INFO L85 PathProgramCache]: Analyzing trace with hash -824554839, now seen corresponding path program 1 times [2022-11-25 22:29:56,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:29:56,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393764315] [2022-11-25 22:29:56,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:29:56,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:29:56,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:29:56,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:29:56,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:29:56,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393764315] [2022-11-25 22:29:56,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393764315] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:29:56,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:29:56,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 22:29:56,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574825229] [2022-11-25 22:29:56,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:29:56,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:29:56,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:29:56,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:29:56,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:29:56,617 INFO L87 Difference]: Start difference. First operand 106 states and 117 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:29:56,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:29:56,869 INFO L93 Difference]: Finished difference Result 141 states and 153 transitions. [2022-11-25 22:29:56,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:29:56,870 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-25 22:29:56,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:29:56,871 INFO L225 Difference]: With dead ends: 141 [2022-11-25 22:29:56,871 INFO L226 Difference]: Without dead ends: 141 [2022-11-25 22:29:56,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:29:56,872 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 137 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:29:56,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 88 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:29:56,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-25 22:29:56,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 128. [2022-11-25 22:29:56,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 82 states have (on average 1.7804878048780488) internal successors, (146), 127 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:29:56,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 146 transitions. [2022-11-25 22:29:56,880 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 146 transitions. Word has length 7 [2022-11-25 22:29:56,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:29:56,880 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 146 transitions. [2022-11-25 22:29:56,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:29:56,881 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 146 transitions. [2022-11-25 22:29:56,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 22:29:56,881 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:29:56,881 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:29:56,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 22:29:56,882 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 22:29:56,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:29:56,883 INFO L85 PathProgramCache]: Analyzing trace with hash -2122975735, now seen corresponding path program 1 times [2022-11-25 22:29:56,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:29:56,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320568373] [2022-11-25 22:29:56,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:29:56,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:29:56,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:29:57,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:29:57,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:29:57,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320568373] [2022-11-25 22:29:57,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320568373] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:29:57,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:29:57,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:29:57,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196826913] [2022-11-25 22:29:57,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:29:57,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:29:57,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:29:57,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:29:57,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:29:57,141 INFO L87 Difference]: Start difference. First operand 128 states and 146 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) [2022-11-25 22:29:57,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:29:57,366 INFO L93 Difference]: Finished difference Result 127 states and 144 transitions. [2022-11-25 22:29:57,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:29:57,366 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 [2022-11-25 22:29:57,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:29:57,367 INFO L225 Difference]: With dead ends: 127 [2022-11-25 22:29:57,367 INFO L226 Difference]: Without dead ends: 127 [2022-11-25 22:29:57,367 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 [2022-11-25 22:29:57,368 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 5 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:29:57,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 196 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:29:57,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-25 22:29:57,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-11-25 22:29:57,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 82 states have (on average 1.7560975609756098) internal successors, (144), 126 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:29:57,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 144 transitions. [2022-11-25 22:29:57,374 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 144 transitions. Word has length 9 [2022-11-25 22:29:57,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:29:57,374 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 144 transitions. [2022-11-25 22:29:57,374 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) [2022-11-25 22:29:57,375 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 144 transitions. [2022-11-25 22:29:57,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 22:29:57,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:29:57,375 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:29:57,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 22:29:57,376 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 22:29:57,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:29:57,376 INFO L85 PathProgramCache]: Analyzing trace with hash -2122975736, now seen corresponding path program 1 times [2022-11-25 22:29:57,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:29:57,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827871209] [2022-11-25 22:29:57,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:29:57,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:29:57,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:29:57,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:29:57,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:29:57,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827871209] [2022-11-25 22:29:57,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827871209] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:29:57,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:29:57,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:29:57,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779814031] [2022-11-25 22:29:57,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:29:57,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:29:57,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:29:57,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:29:57,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:29:57,526 INFO L87 Difference]: Start difference. First operand 127 states and 144 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) [2022-11-25 22:29:57,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:29:57,731 INFO L93 Difference]: Finished difference Result 126 states and 142 transitions. [2022-11-25 22:29:57,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:29:57,732 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 [2022-11-25 22:29:57,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:29:57,733 INFO L225 Difference]: With dead ends: 126 [2022-11-25 22:29:57,733 INFO L226 Difference]: Without dead ends: 126 [2022-11-25 22:29:57,733 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 [2022-11-25 22:29:57,734 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 4 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:29:57,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 216 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:29:57,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-25 22:29:57,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-11-25 22:29:57,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 82 states have (on average 1.7317073170731707) internal successors, (142), 125 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) [2022-11-25 22:29:57,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 142 transitions. [2022-11-25 22:29:57,745 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 142 transitions. Word has length 9 [2022-11-25 22:29:57,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:29:57,745 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 142 transitions. [2022-11-25 22:29:57,745 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) [2022-11-25 22:29:57,746 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 142 transitions. [2022-11-25 22:29:57,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 22:29:57,746 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:29:57,746 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:29:57,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 22:29:57,747 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 22:29:57,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:29:57,747 INFO L85 PathProgramCache]: Analyzing trace with hash -331180861, now seen corresponding path program 1 times [2022-11-25 22:29:57,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:29:57,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842327965] [2022-11-25 22:29:57,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:29:57,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:29:57,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:29:57,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:29:57,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:29:57,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842327965] [2022-11-25 22:29:57,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842327965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:29:57,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:29:57,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:29:57,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011808676] [2022-11-25 22:29:57,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:29:57,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:29:57,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:29:57,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:29:57,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:29:57,829 INFO L87 Difference]: Start difference. First operand 126 states and 142 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:29:57,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:29:57,993 INFO L93 Difference]: Finished difference Result 133 states and 144 transitions. [2022-11-25 22:29:57,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:29:57,994 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-25 22:29:57,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:29:57,995 INFO L225 Difference]: With dead ends: 133 [2022-11-25 22:29:57,995 INFO L226 Difference]: Without dead ends: 133 [2022-11-25 22:29:57,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:29:57,996 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 123 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:29:57,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 130 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:29:57,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-25 22:29:58,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 126. [2022-11-25 22:29:58,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 82 states have (on average 1.6951219512195121) internal successors, (139), 125 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:29:58,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 139 transitions. [2022-11-25 22:29:58,002 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 139 transitions. Word has length 11 [2022-11-25 22:29:58,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:29:58,002 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 139 transitions. [2022-11-25 22:29:58,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:29:58,003 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 139 transitions. [2022-11-25 22:29:58,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 22:29:58,003 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:29:58,003 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:29:58,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 22:29:58,004 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 22:29:58,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:29:58,004 INFO L85 PathProgramCache]: Analyzing trace with hash -69979259, now seen corresponding path program 1 times [2022-11-25 22:29:58,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:29:58,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11060834] [2022-11-25 22:29:58,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:29:58,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:29:58,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:29:58,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:29:58,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:29:58,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11060834] [2022-11-25 22:29:58,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11060834] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:29:58,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:29:58,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 22:29:58,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580362975] [2022-11-25 22:29:58,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:29:58,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 22:29:58,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:29:58,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 22:29:58,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-25 22:29:58,273 INFO L87 Difference]: Start difference. First operand 126 states and 139 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:29:58,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:29:58,618 INFO L93 Difference]: Finished difference Result 126 states and 138 transitions. [2022-11-25 22:29:58,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 22:29:58,618 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-25 22:29:58,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:29:58,619 INFO L225 Difference]: With dead ends: 126 [2022-11-25 22:29:58,619 INFO L226 Difference]: Without dead ends: 126 [2022-11-25 22:29:58,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-25 22:29:58,620 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 135 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:29:58,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 127 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:29:58,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-25 22:29:58,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2022-11-25 22:29:58,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 82 states have (on average 1.6829268292682926) internal successors, (138), 124 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:29:58,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 138 transitions. [2022-11-25 22:29:58,625 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 138 transitions. Word has length 11 [2022-11-25 22:29:58,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:29:58,625 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 138 transitions. [2022-11-25 22:29:58,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:29:58,626 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 138 transitions. [2022-11-25 22:29:58,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 22:29:58,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:29:58,633 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:29:58,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 22:29:58,633 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 22:29:58,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:29:58,636 INFO L85 PathProgramCache]: Analyzing trace with hash -69979258, now seen corresponding path program 1 times [2022-11-25 22:29:58,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:29:58,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791574127] [2022-11-25 22:29:58,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:29:58,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:29:58,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:29:58,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:29:58,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:29:58,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791574127] [2022-11-25 22:29:58,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791574127] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:29:58,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:29:58,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 22:29:58,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227788369] [2022-11-25 22:29:58,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:29:58,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 22:29:58,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:29:58,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 22:29:58,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-25 22:29:58,954 INFO L87 Difference]: Start difference. First operand 125 states and 138 transitions. Second operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:29:59,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:29:59,401 INFO L93 Difference]: Finished difference Result 122 states and 134 transitions. [2022-11-25 22:29:59,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 22:29:59,402 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-25 22:29:59,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:29:59,403 INFO L225 Difference]: With dead ends: 122 [2022-11-25 22:29:59,403 INFO L226 Difference]: Without dead ends: 122 [2022-11-25 22:29:59,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2022-11-25 22:29:59,404 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 128 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:29:59,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 133 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:29:59,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-25 22:29:59,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 114. [2022-11-25 22:29:59,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 76 states have (on average 1.6578947368421053) internal successors, (126), 113 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) [2022-11-25 22:29:59,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2022-11-25 22:29:59,408 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 11 [2022-11-25 22:29:59,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:29:59,408 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2022-11-25 22:29:59,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:29:59,409 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2022-11-25 22:29:59,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 22:29:59,409 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:29:59,409 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:29:59,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 22:29:59,410 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 22:29:59,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:29:59,410 INFO L85 PathProgramCache]: Analyzing trace with hash -435983961, now seen corresponding path program 1 times [2022-11-25 22:29:59,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:29:59,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340434304] [2022-11-25 22:29:59,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:29:59,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:29:59,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:29:59,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:29:59,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:29:59,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340434304] [2022-11-25 22:29:59,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340434304] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:29:59,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:29:59,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 22:29:59,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017677718] [2022-11-25 22:29:59,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:29:59,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:29:59,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:29:59,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:29:59,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:29:59,647 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:29:59,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:29:59,829 INFO L93 Difference]: Finished difference Result 131 states and 145 transitions. [2022-11-25 22:29:59,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 22:29:59,830 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-25 22:29:59,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:29:59,831 INFO L225 Difference]: With dead ends: 131 [2022-11-25 22:29:59,831 INFO L226 Difference]: Without dead ends: 131 [2022-11-25 22:29:59,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:29:59,832 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 23 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:29:59,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 227 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:29:59,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-25 22:29:59,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 119. [2022-11-25 22:29:59,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 81 states have (on average 1.6296296296296295) internal successors, (132), 118 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) [2022-11-25 22:29:59,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 132 transitions. [2022-11-25 22:29:59,835 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 132 transitions. Word has length 13 [2022-11-25 22:29:59,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:29:59,836 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 132 transitions. [2022-11-25 22:29:59,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:29:59,836 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 132 transitions. [2022-11-25 22:29:59,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-25 22:29:59,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:29:59,836 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:29:59,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 22:29:59,837 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr42REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 22:29:59,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:29:59,837 INFO L85 PathProgramCache]: Analyzing trace with hash 750440743, now seen corresponding path program 1 times [2022-11-25 22:29:59,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:29:59,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776091338] [2022-11-25 22:29:59,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:29:59,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:29:59,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:30:00,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:30:00,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:30:00,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776091338] [2022-11-25 22:30:00,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776091338] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:30:00,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:30:00,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 22:30:00,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587904536] [2022-11-25 22:30:00,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:30:00,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:30:00,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:30:00,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:30:00,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:30:00,199 INFO L87 Difference]: Start difference. First operand 119 states and 132 transitions. Second operand has 5 states, 5 states have (on average 3.2) 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) [2022-11-25 22:30:00,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:30:00,424 INFO L93 Difference]: Finished difference Result 127 states and 140 transitions. [2022-11-25 22:30:00,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 22:30:00,426 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) 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 [2022-11-25 22:30:00,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:30:00,427 INFO L225 Difference]: With dead ends: 127 [2022-11-25 22:30:00,427 INFO L226 Difference]: Without dead ends: 127 [2022-11-25 22:30:00,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:30:00,428 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 15 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:30:00,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 226 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:30:00,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-25 22:30:00,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2022-11-25 22:30:00,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 86 states have (on average 1.5930232558139534) internal successors, (137), 123 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:30:00,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 137 transitions. [2022-11-25 22:30:00,433 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 137 transitions. Word has length 16 [2022-11-25 22:30:00,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:30:00,434 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 137 transitions. [2022-11-25 22:30:00,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) 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) [2022-11-25 22:30:00,434 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 137 transitions. [2022-11-25 22:30:00,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-25 22:30:00,436 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:30:00,436 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:30:00,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 22:30:00,437 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 22:30:00,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:30:00,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1788261859, now seen corresponding path program 1 times [2022-11-25 22:30:00,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:30:00,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646588597] [2022-11-25 22:30:00,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:30:00,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:30:00,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:30:00,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:30:00,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:30:00,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646588597] [2022-11-25 22:30:00,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646588597] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:30:00,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:30:00,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:30:00,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679938409] [2022-11-25 22:30:00,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:30:00,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:30:00,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:30:00,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:30:00,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:30:00,571 INFO L87 Difference]: Start difference. First operand 124 states and 137 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:30:00,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:30:00,736 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2022-11-25 22:30:00,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:30:00,737 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-25 22:30:00,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:30:00,738 INFO L225 Difference]: With dead ends: 123 [2022-11-25 22:30:00,738 INFO L226 Difference]: Without dead ends: 123 [2022-11-25 22:30:00,738 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 [2022-11-25 22:30:00,739 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 6 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:30:00,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 195 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:30:00,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-11-25 22:30:00,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-11-25 22:30:00,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 86 states have (on average 1.569767441860465) internal successors, (135), 122 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:30:00,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 135 transitions. [2022-11-25 22:30:00,742 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 135 transitions. Word has length 17 [2022-11-25 22:30:00,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:30:00,742 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 135 transitions. [2022-11-25 22:30:00,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:30:00,742 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 135 transitions. [2022-11-25 22:30:00,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-25 22:30:00,743 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:30:00,743 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:30:00,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 22:30:00,743 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 22:30:00,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:30:00,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1788261860, now seen corresponding path program 1 times [2022-11-25 22:30:00,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:30:00,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853015507] [2022-11-25 22:30:00,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:30:00,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:30:00,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:30:00,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:30:00,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:30:00,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853015507] [2022-11-25 22:30:00,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853015507] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:30:00,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:30:00,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:30:00,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619091250] [2022-11-25 22:30:00,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:30:00,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:30:00,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:30:00,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:30:00,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:30:00,954 INFO L87 Difference]: Start difference. First operand 123 states and 135 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:30:01,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:30:01,140 INFO L93 Difference]: Finished difference Result 122 states and 133 transitions. [2022-11-25 22:30:01,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:30:01,141 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-25 22:30:01,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:30:01,142 INFO L225 Difference]: With dead ends: 122 [2022-11-25 22:30:01,142 INFO L226 Difference]: Without dead ends: 122 [2022-11-25 22:30:01,142 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 [2022-11-25 22:30:01,143 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 3 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:30:01,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 183 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:30:01,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-25 22:30:01,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-11-25 22:30:01,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 86 states have (on average 1.5465116279069768) internal successors, (133), 121 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) [2022-11-25 22:30:01,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 133 transitions. [2022-11-25 22:30:01,146 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 133 transitions. Word has length 17 [2022-11-25 22:30:01,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:30:01,146 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 133 transitions. [2022-11-25 22:30:01,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:30:01,147 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 133 transitions. [2022-11-25 22:30:01,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-25 22:30:01,147 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:30:01,147 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:30:01,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 22:30:01,148 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 22:30:01,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:30:01,148 INFO L85 PathProgramCache]: Analyzing trace with hash 532879792, now seen corresponding path program 1 times [2022-11-25 22:30:01,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:30:01,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410562601] [2022-11-25 22:30:01,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:30:01,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:30:01,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:30:01,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:30:01,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:30:01,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410562601] [2022-11-25 22:30:01,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410562601] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:30:01,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:30:01,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 22:30:01,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071475608] [2022-11-25 22:30:01,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:30:01,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 22:30:01,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:30:01,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 22:30:01,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-25 22:30:01,370 INFO L87 Difference]: Start difference. First operand 122 states and 133 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 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) [2022-11-25 22:30:01,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:30:01,612 INFO L93 Difference]: Finished difference Result 122 states and 132 transitions. [2022-11-25 22:30:01,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 22:30:01,612 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 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 [2022-11-25 22:30:01,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:30:01,613 INFO L225 Difference]: With dead ends: 122 [2022-11-25 22:30:01,613 INFO L226 Difference]: Without dead ends: 122 [2022-11-25 22:30:01,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-25 22:30:01,614 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 115 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:30:01,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 99 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:30:01,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-25 22:30:01,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2022-11-25 22:30:01,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 86 states have (on average 1.5348837209302326) internal successors, (132), 120 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) [2022-11-25 22:30:01,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 132 transitions. [2022-11-25 22:30:01,617 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 132 transitions. Word has length 19 [2022-11-25 22:30:01,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:30:01,617 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 132 transitions. [2022-11-25 22:30:01,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 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) [2022-11-25 22:30:01,617 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 132 transitions. [2022-11-25 22:30:01,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-25 22:30:01,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:30:01,618 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:30:01,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 22:30:01,618 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 22:30:01,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:30:01,618 INFO L85 PathProgramCache]: Analyzing trace with hash 532879793, now seen corresponding path program 1 times [2022-11-25 22:30:01,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:30:01,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913034389] [2022-11-25 22:30:01,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:30:01,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:30:01,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:30:01,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:30:01,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:30:01,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913034389] [2022-11-25 22:30:01,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913034389] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:30:01,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:30:01,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 22:30:01,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955386332] [2022-11-25 22:30:01,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:30:01,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 22:30:01,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:30:01,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 22:30:01,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-25 22:30:01,938 INFO L87 Difference]: Start difference. First operand 121 states and 132 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 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) [2022-11-25 22:30:02,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:30:02,380 INFO L93 Difference]: Finished difference Result 121 states and 131 transitions. [2022-11-25 22:30:02,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 22:30:02,381 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 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 [2022-11-25 22:30:02,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:30:02,382 INFO L225 Difference]: With dead ends: 121 [2022-11-25 22:30:02,382 INFO L226 Difference]: Without dead ends: 121 [2022-11-25 22:30:02,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-25 22:30:02,383 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 111 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:30:02,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 173 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:30:02,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-25 22:30:02,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2022-11-25 22:30:02,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 86 states have (on average 1.5116279069767442) internal successors, (130), 118 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) [2022-11-25 22:30:02,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 130 transitions. [2022-11-25 22:30:02,387 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 130 transitions. Word has length 19 [2022-11-25 22:30:02,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:30:02,387 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 130 transitions. [2022-11-25 22:30:02,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 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) [2022-11-25 22:30:02,387 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 130 transitions. [2022-11-25 22:30:02,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-25 22:30:02,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:30:02,388 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:30:02,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 22:30:02,388 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 22:30:02,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:30:02,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1376534989, now seen corresponding path program 1 times [2022-11-25 22:30:02,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:30:02,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451090174] [2022-11-25 22:30:02,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:30:02,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:30:02,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:30:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:30:02,744 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:30:02,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451090174] [2022-11-25 22:30:02,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451090174] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:30:02,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366308696] [2022-11-25 22:30:02,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:30:02,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:30:02,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e510d60e-e20e-47a5-a202-dc5d4ce4b932/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:30:02,750 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e510d60e-e20e-47a5-a202-dc5d4ce4b932/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:30:02,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e510d60e-e20e-47a5-a202-dc5d4ce4b932/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 22:30:02,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:30:02,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-25 22:30:02,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:30:02,985 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 22:30:03,101 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 22:30:03,101 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 11 treesize of output 11 [2022-11-25 22:30:03,149 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 [2022-11-25 22:30:03,240 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 22:30:03,240 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 19 treesize of output 22 [2022-11-25 22:30:03,323 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 22:30:03,324 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 22 treesize of output 22 [2022-11-25 22:30:03,385 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 22:30:03,386 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 28 treesize of output 29 [2022-11-25 22:30:03,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:30:03,556 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:30:03,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2022-11-25 22:30:03,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:30:03,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:30:05,901 INFO L321 Elim1Store]: treesize reduction 5, result has 66.7 percent of original size [2022-11-25 22:30:05,902 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 19 treesize of output 18 [2022-11-25 22:30:06,092 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_482 (Array Int Int)) (v_ArrVal_484 (Array Int Int)) (|v_ULTIMATE.start_main_~x~0#1.offset_135| Int)) (or (not (<= 0 |v_ULTIMATE.start_main_~x~0#1.offset_135|)) (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_482))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (= (select (select (store .cse0 .cse1 v_ArrVal_484) |c_ULTIMATE.start_main_~head~0#1.base|) |v_ULTIMATE.start_main_~x~0#1.offset_135|) .cse1))) (not (<= |v_ULTIMATE.start_main_~x~0#1.offset_135| |c_ULTIMATE.start_main_~head~0#1.offset|)))) is different from false [2022-11-25 22:30:06,123 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_482 (Array Int Int)) (v_ArrVal_484 (Array Int Int)) (|v_ULTIMATE.start_main_~x~0#1.offset_135| Int)) (or (not (<= 0 |v_ULTIMATE.start_main_~x~0#1.offset_135|)) (let ((.cse0 (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_482))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (= (select (select (store .cse0 .cse1 v_ArrVal_484) |c_ULTIMATE.start_main_~head~0#1.base|) |v_ULTIMATE.start_main_~x~0#1.offset_135|) .cse1))) (not (<= |v_ULTIMATE.start_main_~x~0#1.offset_135| |c_ULTIMATE.start_main_~head~0#1.offset|)))) is different from false [2022-11-25 22:30:06,146 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:30:06,147 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 1 case distinctions, treesize of input 51 treesize of output 36 [2022-11-25 22:30:06,174 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:30:06,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 244 treesize of output 207 [2022-11-25 22:30:06,199 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:30:06,199 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 192 treesize of output 166 [2022-11-25 22:30:06,210 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 158 treesize of output 146 [2022-11-25 22:30:07,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:30:07,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366308696] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:30:07,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [680720888] [2022-11-25 22:30:07,085 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-25 22:30:07,085 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:30:07,090 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:30:07,098 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:30:07,098 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:30:07,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-25 22:30:07,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-25 22:30:07,202 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 [2022-11-25 22:30:07,209 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 [2022-11-25 22:30:07,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,228 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 21 treesize of output 20 [2022-11-25 22:30:07,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-25 22:30:07,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,252 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 21 treesize of output 20 [2022-11-25 22:30:07,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-25 22:30:07,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-25 22:30:07,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-25 22:30:07,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-25 22:30:07,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-25 22:30:07,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2022-11-25 22:30:07,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2022-11-25 22:30:07,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:30:07,508 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-25 22:30:07,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 172 treesize of output 125 [2022-11-25 22:30:07,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 94 [2022-11-25 22:30:07,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 33 [2022-11-25 22:30:07,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,616 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-25 22:30:07,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 43 [2022-11-25 22:30:07,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:30:07,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:30:07,660 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-25 22:30:07,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 84 [2022-11-25 22:30:07,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 47 [2022-11-25 22:30:07,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:30:07,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:30:07,731 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-25 22:30:07,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 123 treesize of output 87 [2022-11-25 22:30:07,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 46 [2022-11-25 22:30:07,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2022-11-25 22:30:07,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 48 [2022-11-25 22:30:07,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 43 [2022-11-25 22:30:07,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2022-11-25 22:30:07,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:07,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 43 [2022-11-25 22:30:08,009 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:30:08,016 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:30:08,024 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 22:30:08,423 INFO L321 Elim1Store]: treesize reduction 96, result has 68.5 percent of original size [2022-11-25 22:30:08,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 230 treesize of output 372 [2022-11-25 22:30:08,807 INFO L321 Elim1Store]: treesize reduction 72, result has 67.4 percent of original size [2022-11-25 22:30:08,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 320 treesize of output 360