./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/forester-heap/dll-optional-1.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_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/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_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/dll-optional-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/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_63525bf4-ad35-4bec-be62-653f0d7ed803/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 1c592bb1d39faa1e5f3d20603a8bfbb8fe6cff4de59ea35fafbddd50b8917b41 --- 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 [2022-11-26 00:44:14,633 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:44:14,636 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:44:14,676 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:44:14,676 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:44:14,680 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:44:14,683 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:44:14,687 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:44:14,691 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:44:14,694 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:44:14,697 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:44:14,699 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:44:14,699 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:44:14,706 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:44:14,708 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:44:14,709 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:44:14,711 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:44:14,712 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:44:14,713 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:44:14,717 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:44:14,722 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:44:14,723 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:44:14,726 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:44:14,727 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:44:14,733 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:44:14,738 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:44:14,738 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:44:14,739 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:44:14,742 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:44:14,743 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:44:14,744 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:44:14,745 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:44:14,747 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:44:14,748 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:44:14,750 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:44:14,750 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:44:14,751 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:44:14,751 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:44:14,751 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:44:14,754 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:44:14,755 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:44:14,757 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-26 00:44:14,795 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:44:14,795 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:44:14,796 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:44:14,796 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:44:14,797 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:44:14,797 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:44:14,798 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:44:14,798 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:44:14,798 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:44:14,798 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:44:14,799 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:44:14,800 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:44:14,800 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:44:14,800 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:44:14,800 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:44:14,801 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:44:14,801 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:44:14,801 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:44:14,802 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-26 00:44:14,802 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-26 00:44:14,802 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:44:14,802 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:44:14,803 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 00:44:14,803 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:44:14,803 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:44:14,803 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:44:14,804 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-26 00:44:14,804 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-26 00:44:14,804 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-26 00:44:14,805 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:44:14,805 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-26 00:44:14,805 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:44:14,805 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:44:14,806 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:44:14,806 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:44:14,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:44:14,806 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:44:14,807 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:44:14,807 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:44:14,807 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:44:14,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:44:14,808 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:44:14,808 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_63525bf4-ad35-4bec-be62-653f0d7ed803/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c592bb1d39faa1e5f3d20603a8bfbb8fe6cff4de59ea35fafbddd50b8917b41 [2022-11-26 00:44:15,120 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:44:15,153 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:44:15,156 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:44:15,157 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:44:15,157 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:44:15,159 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/forester-heap/dll-optional-1.i [2022-11-26 00:44:18,178 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:44:18,440 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:44:18,441 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/sv-benchmarks/c/forester-heap/dll-optional-1.i [2022-11-26 00:44:18,459 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/data/4c9570825/60eb35740f7941f3b7ff0e1073846eba/FLAGa1b15c507 [2022-11-26 00:44:18,478 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/data/4c9570825/60eb35740f7941f3b7ff0e1073846eba [2022-11-26 00:44:18,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:44:18,483 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:44:18,484 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:44:18,484 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:44:18,488 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:44:18,489 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:44:18" (1/1) ... [2022-11-26 00:44:18,491 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ca300f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:18, skipping insertion in model container [2022-11-26 00:44:18,491 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:44:18" (1/1) ... [2022-11-26 00:44:18,499 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:44:18,541 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:44:18,940 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_63525bf4-ad35-4bec-be62-653f0d7ed803/sv-benchmarks/c/forester-heap/dll-optional-1.i[22753,22766] [2022-11-26 00:44:18,957 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:44:18,970 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:44:19,030 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_63525bf4-ad35-4bec-be62-653f0d7ed803/sv-benchmarks/c/forester-heap/dll-optional-1.i[22753,22766] [2022-11-26 00:44:19,033 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:44:19,065 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:44:19,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:19 WrapperNode [2022-11-26 00:44:19,065 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:44:19,067 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:44:19,067 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:44:19,067 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:44:19,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:19" (1/1) ... [2022-11-26 00:44:19,111 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:19" (1/1) ... [2022-11-26 00:44:19,140 INFO L138 Inliner]: procedures = 119, calls = 44, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 140 [2022-11-26 00:44:19,143 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:44:19,143 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:44:19,144 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:44:19,144 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:44:19,154 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:19" (1/1) ... [2022-11-26 00:44:19,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:19" (1/1) ... [2022-11-26 00:44:19,162 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:19" (1/1) ... [2022-11-26 00:44:19,162 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:19" (1/1) ... [2022-11-26 00:44:19,182 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:19" (1/1) ... [2022-11-26 00:44:19,186 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:19" (1/1) ... [2022-11-26 00:44:19,188 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:19" (1/1) ... [2022-11-26 00:44:19,190 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:19" (1/1) ... [2022-11-26 00:44:19,192 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:44:19,193 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:44:19,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:44:19,194 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:44:19,195 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:19" (1/1) ... [2022-11-26 00:44:19,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:44:19,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:44:19,241 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:44:19,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:44:19,302 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 00:44:19,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 00:44:19,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-26 00:44:19,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:44:19,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-26 00:44:19,303 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-26 00:44:19,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:44:19,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:44:19,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:44:19,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:44:19,498 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:44:19,501 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:44:20,085 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:44:20,135 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:44:20,136 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-26 00:44:20,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:44:20 BoogieIcfgContainer [2022-11-26 00:44:20,139 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:44:20,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:44:20,142 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:44:20,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:44:20,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:44:18" (1/3) ... [2022-11-26 00:44:20,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c1648a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:44:20, skipping insertion in model container [2022-11-26 00:44:20,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:19" (2/3) ... [2022-11-26 00:44:20,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c1648a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:44:20, skipping insertion in model container [2022-11-26 00:44:20,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:44:20" (3/3) ... [2022-11-26 00:44:20,149 INFO L112 eAbstractionObserver]: Analyzing ICFG dll-optional-1.i [2022-11-26 00:44:20,169 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:44:20,170 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 72 error locations. [2022-11-26 00:44:20,228 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:44:20,235 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;@4555d879, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:44:20,235 INFO L358 AbstractCegarLoop]: Starting to check reachability of 72 error locations. [2022-11-26 00:44:20,240 INFO L276 IsEmpty]: Start isEmpty. Operand has 132 states, 59 states have (on average 2.4745762711864407) internal successors, (146), 131 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) [2022-11-26 00:44:20,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-26 00:44:20,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:20,250 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-26 00:44:20,252 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-26 00:44:20,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:20,259 INFO L85 PathProgramCache]: Analyzing trace with hash 8653, now seen corresponding path program 1 times [2022-11-26 00:44:20,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:20,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071429676] [2022-11-26 00:44:20,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:20,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:20,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:20,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:20,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:20,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071429676] [2022-11-26 00:44:20,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071429676] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:20,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:20,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:44:20,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704007981] [2022-11-26 00:44:20,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:20,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:44:20,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:20,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:44:20,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:44:20,583 INFO L87 Difference]: Start difference. First operand has 132 states, 59 states have (on average 2.4745762711864407) internal successors, (146), 131 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) 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) [2022-11-26 00:44:20,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:20,843 INFO L93 Difference]: Finished difference Result 131 states and 141 transitions. [2022-11-26 00:44:20,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:44:20,846 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 [2022-11-26 00:44:20,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:20,861 INFO L225 Difference]: With dead ends: 131 [2022-11-26 00:44:20,861 INFO L226 Difference]: Without dead ends: 129 [2022-11-26 00:44:20,863 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 [2022-11-26 00:44:20,870 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 118 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:20,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 61 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:44:20,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-26 00:44:20,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2022-11-26 00:44:20,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 62 states have (on average 2.193548387096774) internal successors, (136), 123 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:20,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 136 transitions. [2022-11-26 00:44:20,909 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 136 transitions. Word has length 2 [2022-11-26 00:44:20,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:20,909 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 136 transitions. [2022-11-26 00:44:20,910 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) [2022-11-26 00:44:20,910 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 136 transitions. [2022-11-26 00:44:20,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-26 00:44:20,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:20,910 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-26 00:44:20,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:44:20,911 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-26 00:44:20,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:20,912 INFO L85 PathProgramCache]: Analyzing trace with hash 8654, now seen corresponding path program 1 times [2022-11-26 00:44:20,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:20,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884321422] [2022-11-26 00:44:20,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:20,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:20,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:20,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:20,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:20,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884321422] [2022-11-26 00:44:20,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884321422] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:20,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:20,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:44:20,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601813636] [2022-11-26 00:44:20,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:20,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:44:20,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:20,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:44:20,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:44:20,989 INFO L87 Difference]: Start difference. First operand 124 states and 136 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) [2022-11-26 00:44:21,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:21,149 INFO L93 Difference]: Finished difference Result 118 states and 130 transitions. [2022-11-26 00:44:21,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:44:21,149 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 [2022-11-26 00:44:21,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:21,154 INFO L225 Difference]: With dead ends: 118 [2022-11-26 00:44:21,155 INFO L226 Difference]: Without dead ends: 118 [2022-11-26 00:44:21,161 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 [2022-11-26 00:44:21,165 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 95 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:21,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 76 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:44:21,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-26 00:44:21,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2022-11-26 00:44:21,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 62 states have (on average 2.0483870967741935) internal successors, (127), 114 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:21,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 127 transitions. [2022-11-26 00:44:21,183 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 127 transitions. Word has length 2 [2022-11-26 00:44:21,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:21,184 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 127 transitions. [2022-11-26 00:44:21,184 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) [2022-11-26 00:44:21,185 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 127 transitions. [2022-11-26 00:44:21,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-26 00:44:21,185 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:21,185 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:21,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:44:21,187 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-26 00:44:21,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:21,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1990743745, now seen corresponding path program 1 times [2022-11-26 00:44:21,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:21,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761285613] [2022-11-26 00:44:21,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:21,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:21,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:21,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:21,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:21,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761285613] [2022-11-26 00:44:21,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761285613] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:21,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:21,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:44:21,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232966694] [2022-11-26 00:44:21,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:21,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:44:21,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:21,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:44:21,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:44:21,455 INFO L87 Difference]: Start difference. First operand 115 states and 127 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:21,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:21,717 INFO L93 Difference]: Finished difference Result 152 states and 169 transitions. [2022-11-26 00:44:21,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:44:21,718 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-26 00:44:21,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:21,719 INFO L225 Difference]: With dead ends: 152 [2022-11-26 00:44:21,720 INFO L226 Difference]: Without dead ends: 152 [2022-11-26 00:44:21,720 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 [2022-11-26 00:44:21,721 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 43 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:21,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 248 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:44:21,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-26 00:44:21,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 114. [2022-11-26 00:44:21,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 62 states have (on average 2.032258064516129) 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) [2022-11-26 00:44:21,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2022-11-26 00:44:21,730 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 8 [2022-11-26 00:44:21,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:21,731 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2022-11-26 00:44:21,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:21,731 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2022-11-26 00:44:21,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-26 00:44:21,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:21,732 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:21,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:44:21,733 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-26 00:44:21,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:21,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1990743744, now seen corresponding path program 1 times [2022-11-26 00:44:21,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:21,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818846495] [2022-11-26 00:44:21,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:21,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:21,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:21,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:21,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:21,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818846495] [2022-11-26 00:44:21,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818846495] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:21,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:21,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:44:21,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299337204] [2022-11-26 00:44:21,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:21,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:44:21,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:21,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:44:21,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:44:21,990 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:22,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:22,221 INFO L93 Difference]: Finished difference Result 113 states and 125 transitions. [2022-11-26 00:44:22,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:44:22,222 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-26 00:44:22,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:22,223 INFO L225 Difference]: With dead ends: 113 [2022-11-26 00:44:22,223 INFO L226 Difference]: Without dead ends: 113 [2022-11-26 00:44:22,223 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 [2022-11-26 00:44:22,224 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 1 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:22,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 275 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:44:22,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-26 00:44:22,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-11-26 00:44:22,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 112 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:22,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2022-11-26 00:44:22,231 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 8 [2022-11-26 00:44:22,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:22,231 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2022-11-26 00:44:22,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:22,232 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2022-11-26 00:44:22,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-26 00:44:22,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:22,232 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:22,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:44:22,233 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-26 00:44:22,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:22,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1844514240, now seen corresponding path program 1 times [2022-11-26 00:44:22,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:22,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53447789] [2022-11-26 00:44:22,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:22,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:22,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:22,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:22,344 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:22,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53447789] [2022-11-26 00:44:22,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53447789] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:22,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:22,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:44:22,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117373513] [2022-11-26 00:44:22,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:22,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:44:22,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:22,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:44:22,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:44:22,347 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) 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) [2022-11-26 00:44:22,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:22,530 INFO L93 Difference]: Finished difference Result 111 states and 122 transitions. [2022-11-26 00:44:22,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:44:22,539 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) 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 [2022-11-26 00:44:22,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:22,540 INFO L225 Difference]: With dead ends: 111 [2022-11-26 00:44:22,540 INFO L226 Difference]: Without dead ends: 111 [2022-11-26 00:44:22,541 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 [2022-11-26 00:44:22,542 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 152 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:22,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 52 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:44:22,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-26 00:44:22,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 104. [2022-11-26 00:44:22,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 67 states have (on average 1.8059701492537314) internal successors, (121), 103 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:22,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 121 transitions. [2022-11-26 00:44:22,548 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 121 transitions. Word has length 11 [2022-11-26 00:44:22,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:22,549 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 121 transitions. [2022-11-26 00:44:22,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) 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) [2022-11-26 00:44:22,549 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 121 transitions. [2022-11-26 00:44:22,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-26 00:44:22,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:22,550 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:22,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-26 00:44:22,550 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-26 00:44:22,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:22,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1844514241, now seen corresponding path program 1 times [2022-11-26 00:44:22,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:22,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217299583] [2022-11-26 00:44:22,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:22,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:22,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:22,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:22,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:22,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217299583] [2022-11-26 00:44:22,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217299583] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:22,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:22,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:44:22,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755020278] [2022-11-26 00:44:22,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:22,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:44:22,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:22,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:44:22,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:44:22,781 INFO L87 Difference]: Start difference. First operand 104 states and 121 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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) [2022-11-26 00:44:23,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:23,029 INFO L93 Difference]: Finished difference Result 144 states and 162 transitions. [2022-11-26 00:44:23,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:44:23,030 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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 [2022-11-26 00:44:23,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:23,031 INFO L225 Difference]: With dead ends: 144 [2022-11-26 00:44:23,031 INFO L226 Difference]: Without dead ends: 144 [2022-11-26 00:44:23,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:44:23,032 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 188 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:23,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 84 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:44:23,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-26 00:44:23,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 129. [2022-11-26 00:44:23,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 92 states have (on average 1.6956521739130435) internal successors, (156), 128 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:23,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 156 transitions. [2022-11-26 00:44:23,039 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 156 transitions. Word has length 11 [2022-11-26 00:44:23,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:23,039 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 156 transitions. [2022-11-26 00:44:23,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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) [2022-11-26 00:44:23,039 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 156 transitions. [2022-11-26 00:44:23,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:44:23,040 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:23,040 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:23,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-26 00:44:23,040 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-26 00:44:23,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:23,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1243133608, now seen corresponding path program 1 times [2022-11-26 00:44:23,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:23,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674898280] [2022-11-26 00:44:23,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:23,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:23,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:23,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:23,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:23,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674898280] [2022-11-26 00:44:23,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674898280] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:23,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:23,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:44:23,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422785666] [2022-11-26 00:44:23,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:23,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:44:23,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:23,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:44:23,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:44:23,152 INFO L87 Difference]: Start difference. First operand 129 states and 156 transitions. Second operand has 5 states, 4 states have (on average 3.25) 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) [2022-11-26 00:44:23,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:23,320 INFO L93 Difference]: Finished difference Result 128 states and 154 transitions. [2022-11-26 00:44:23,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:44:23,320 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) 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 [2022-11-26 00:44:23,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:23,321 INFO L225 Difference]: With dead ends: 128 [2022-11-26 00:44:23,321 INFO L226 Difference]: Without dead ends: 128 [2022-11-26 00:44:23,322 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 [2022-11-26 00:44:23,322 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 6 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:23,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 226 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:44:23,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-26 00:44:23,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-11-26 00:44:23,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 92 states have (on average 1.673913043478261) internal successors, (154), 127 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:23,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 154 transitions. [2022-11-26 00:44:23,328 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 154 transitions. Word has length 13 [2022-11-26 00:44:23,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:23,328 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 154 transitions. [2022-11-26 00:44:23,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) 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) [2022-11-26 00:44:23,329 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 154 transitions. [2022-11-26 00:44:23,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:44:23,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:23,329 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:23,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-26 00:44:23,330 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-26 00:44:23,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:23,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1243133607, now seen corresponding path program 1 times [2022-11-26 00:44:23,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:23,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187669608] [2022-11-26 00:44:23,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:23,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:23,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:23,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:23,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:23,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187669608] [2022-11-26 00:44:23,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187669608] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:23,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:23,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:44:23,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398022635] [2022-11-26 00:44:23,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:23,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:44:23,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:23,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:44:23,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:44:23,575 INFO L87 Difference]: Start difference. First operand 128 states and 154 transitions. Second operand has 5 states, 4 states have (on average 3.25) 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) [2022-11-26 00:44:23,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:23,777 INFO L93 Difference]: Finished difference Result 127 states and 152 transitions. [2022-11-26 00:44:23,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:44:23,778 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) 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 [2022-11-26 00:44:23,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:23,779 INFO L225 Difference]: With dead ends: 127 [2022-11-26 00:44:23,779 INFO L226 Difference]: Without dead ends: 127 [2022-11-26 00:44:23,779 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 [2022-11-26 00:44:23,780 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 3 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:23,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 215 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:44:23,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-26 00:44:23,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-11-26 00:44:23,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 92 states have (on average 1.6521739130434783) internal successors, (152), 126 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:23,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 152 transitions. [2022-11-26 00:44:23,785 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 152 transitions. Word has length 13 [2022-11-26 00:44:23,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:23,785 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 152 transitions. [2022-11-26 00:44:23,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) 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) [2022-11-26 00:44:23,785 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 152 transitions. [2022-11-26 00:44:23,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-26 00:44:23,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:23,786 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:23,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-26 00:44:23,787 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr71ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-26 00:44:23,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:23,787 INFO L85 PathProgramCache]: Analyzing trace with hash 112306669, now seen corresponding path program 1 times [2022-11-26 00:44:23,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:23,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352922051] [2022-11-26 00:44:23,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:23,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:23,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:23,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:23,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:23,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352922051] [2022-11-26 00:44:23,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352922051] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:23,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:23,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:44:23,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644334913] [2022-11-26 00:44:23,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:23,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:44:23,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:23,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:44:23,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:44:23,870 INFO L87 Difference]: Start difference. First operand 127 states and 152 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:24,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:24,016 INFO L93 Difference]: Finished difference Result 143 states and 162 transitions. [2022-11-26 00:44:24,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:44:24,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-26 00:44:24,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:24,017 INFO L225 Difference]: With dead ends: 143 [2022-11-26 00:44:24,017 INFO L226 Difference]: Without dead ends: 143 [2022-11-26 00:44:24,018 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 [2022-11-26 00:44:24,021 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 141 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:24,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 120 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:44:24,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-26 00:44:24,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 127. [2022-11-26 00:44:24,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 92 states have (on average 1.6304347826086956) internal successors, (150), 126 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:24,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 150 transitions. [2022-11-26 00:44:24,031 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 150 transitions. Word has length 14 [2022-11-26 00:44:24,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:24,031 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 150 transitions. [2022-11-26 00:44:24,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:24,032 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 150 transitions. [2022-11-26 00:44:24,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 00:44:24,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:24,032 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:24,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-26 00:44:24,033 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-26 00:44:24,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:24,033 INFO L85 PathProgramCache]: Analyzing trace with hash -650305467, now seen corresponding path program 1 times [2022-11-26 00:44:24,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:24,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286458565] [2022-11-26 00:44:24,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:24,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:24,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:24,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:24,371 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:24,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286458565] [2022-11-26 00:44:24,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286458565] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:24,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:24,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-26 00:44:24,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828701578] [2022-11-26 00:44:24,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:24,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:44:24,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:24,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:44:24,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:44:24,374 INFO L87 Difference]: Start difference. First operand 127 states and 150 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:24,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:24,719 INFO L93 Difference]: Finished difference Result 128 states and 149 transitions. [2022-11-26 00:44:24,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:44:24,719 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-26 00:44:24,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:24,720 INFO L225 Difference]: With dead ends: 128 [2022-11-26 00:44:24,720 INFO L226 Difference]: Without dead ends: 128 [2022-11-26 00:44:24,721 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 [2022-11-26 00:44:24,721 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 143 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:24,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 187 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:44:24,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-26 00:44:24,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2022-11-26 00:44:24,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 92 states have (on average 1.6195652173913044) internal successors, (149), 125 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:24,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 149 transitions. [2022-11-26 00:44:24,725 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 149 transitions. Word has length 15 [2022-11-26 00:44:24,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:24,726 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 149 transitions. [2022-11-26 00:44:24,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:24,726 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 149 transitions. [2022-11-26 00:44:24,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 00:44:24,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:24,727 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:24,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-26 00:44:24,727 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-26 00:44:24,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:24,728 INFO L85 PathProgramCache]: Analyzing trace with hash -650305466, now seen corresponding path program 1 times [2022-11-26 00:44:24,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:24,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77535214] [2022-11-26 00:44:24,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:24,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:24,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:25,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:25,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:25,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77535214] [2022-11-26 00:44:25,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77535214] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:25,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:25,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-26 00:44:25,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536241301] [2022-11-26 00:44:25,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:25,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:44:25,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:25,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:44:25,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:44:25,130 INFO L87 Difference]: Start difference. First operand 126 states and 149 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:25,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:25,613 INFO L93 Difference]: Finished difference Result 118 states and 139 transitions. [2022-11-26 00:44:25,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:44:25,614 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-26 00:44:25,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:25,615 INFO L225 Difference]: With dead ends: 118 [2022-11-26 00:44:25,615 INFO L226 Difference]: Without dead ends: 118 [2022-11-26 00:44:25,615 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 [2022-11-26 00:44:25,616 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 136 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:25,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 225 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:44:25,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-26 00:44:25,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 109. [2022-11-26 00:44:25,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 86 states have (on average 1.5232558139534884) internal successors, (131), 108 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:25,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 131 transitions. [2022-11-26 00:44:25,622 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 131 transitions. Word has length 15 [2022-11-26 00:44:25,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:25,623 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 131 transitions. [2022-11-26 00:44:25,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:25,623 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 131 transitions. [2022-11-26 00:44:25,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-26 00:44:25,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:25,626 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:25,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-26 00:44:25,627 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-26 00:44:25,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:25,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1773712200, now seen corresponding path program 1 times [2022-11-26 00:44:25,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:25,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758549456] [2022-11-26 00:44:25,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:25,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:25,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:25,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:25,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:25,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758549456] [2022-11-26 00:44:25,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758549456] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:25,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:25,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:44:25,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950954163] [2022-11-26 00:44:25,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:25,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:44:25,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:25,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:44:25,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:44:25,707 INFO L87 Difference]: Start difference. First operand 109 states and 131 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:25,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:25,784 INFO L93 Difference]: Finished difference Result 131 states and 161 transitions. [2022-11-26 00:44:25,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:44:25,784 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2022-11-26 00:44:25,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:25,785 INFO L225 Difference]: With dead ends: 131 [2022-11-26 00:44:25,786 INFO L226 Difference]: Without dead ends: 131 [2022-11-26 00:44:25,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:44:25,786 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 18 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:25,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 201 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:44:25,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-26 00:44:25,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 113. [2022-11-26 00:44:25,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 90 states have (on average 1.5) internal successors, (135), 112 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) [2022-11-26 00:44:25,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 135 transitions. [2022-11-26 00:44:25,792 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 135 transitions. Word has length 18 [2022-11-26 00:44:25,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:25,794 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 135 transitions. [2022-11-26 00:44:25,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:25,794 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 135 transitions. [2022-11-26 00:44:25,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-26 00:44:25,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:25,797 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:25,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-26 00:44:25,798 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-26 00:44:25,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:25,798 INFO L85 PathProgramCache]: Analyzing trace with hash -921621590, now seen corresponding path program 1 times [2022-11-26 00:44:25,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:25,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321431745] [2022-11-26 00:44:25,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:25,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:25,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:25,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:25,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:25,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321431745] [2022-11-26 00:44:25,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321431745] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:25,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:25,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:44:25,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483179290] [2022-11-26 00:44:25,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:25,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:44:25,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:25,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:44:25,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:44:25,997 INFO L87 Difference]: Start difference. First operand 113 states and 135 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 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) [2022-11-26 00:44:26,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:26,353 INFO L93 Difference]: Finished difference Result 205 states and 243 transitions. [2022-11-26 00:44:26,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:44:26,354 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 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 [2022-11-26 00:44:26,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:26,354 INFO L225 Difference]: With dead ends: 205 [2022-11-26 00:44:26,355 INFO L226 Difference]: Without dead ends: 205 [2022-11-26 00:44:26,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:44:26,355 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 169 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:26,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 240 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:44:26,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-11-26 00:44:26,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 125. [2022-11-26 00:44:26,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 102 states have (on average 1.4803921568627452) internal successors, (151), 124 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:26,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 151 transitions. [2022-11-26 00:44:26,360 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 151 transitions. Word has length 19 [2022-11-26 00:44:26,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:26,360 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 151 transitions. [2022-11-26 00:44:26,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 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) [2022-11-26 00:44:26,360 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 151 transitions. [2022-11-26 00:44:26,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-26 00:44:26,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:26,361 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:26,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-26 00:44:26,361 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-26 00:44:26,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:26,362 INFO L85 PathProgramCache]: Analyzing trace with hash -921621589, now seen corresponding path program 1 times [2022-11-26 00:44:26,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:26,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475547316] [2022-11-26 00:44:26,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:26,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:26,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:26,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:26,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:26,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475547316] [2022-11-26 00:44:26,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475547316] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:26,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:26,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:44:26,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554060947] [2022-11-26 00:44:26,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:26,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:44:26,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:26,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:44:26,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:44:26,543 INFO L87 Difference]: Start difference. First operand 125 states and 151 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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) [2022-11-26 00:44:26,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:26,854 INFO L93 Difference]: Finished difference Result 217 states and 261 transitions. [2022-11-26 00:44:26,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 00:44:26,855 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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 [2022-11-26 00:44:26,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:26,856 INFO L225 Difference]: With dead ends: 217 [2022-11-26 00:44:26,856 INFO L226 Difference]: Without dead ends: 217 [2022-11-26 00:44:26,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:44:26,857 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 132 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:26,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 271 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:44:26,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-11-26 00:44:26,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 121. [2022-11-26 00:44:26,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 98 states have (on average 1.4795918367346939) internal successors, (145), 120 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:26,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 145 transitions. [2022-11-26 00:44:26,861 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 145 transitions. Word has length 19 [2022-11-26 00:44:26,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:26,861 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 145 transitions. [2022-11-26 00:44:26,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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) [2022-11-26 00:44:26,861 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 145 transitions. [2022-11-26 00:44:26,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-26 00:44:26,862 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:26,862 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:26,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-26 00:44:26,862 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-26 00:44:26,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:26,863 INFO L85 PathProgramCache]: Analyzing trace with hash 116840971, now seen corresponding path program 1 times [2022-11-26 00:44:26,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:26,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351634108] [2022-11-26 00:44:26,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:26,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:26,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:27,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:27,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:27,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351634108] [2022-11-26 00:44:27,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351634108] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:27,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:27,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-26 00:44:27,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329186258] [2022-11-26 00:44:27,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:27,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:44:27,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:27,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:44:27,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:44:27,156 INFO L87 Difference]: Start difference. First operand 121 states and 145 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:27,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:27,688 INFO L93 Difference]: Finished difference Result 255 states and 302 transitions. [2022-11-26 00:44:27,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-26 00:44:27,689 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-26 00:44:27,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:27,690 INFO L225 Difference]: With dead ends: 255 [2022-11-26 00:44:27,690 INFO L226 Difference]: Without dead ends: 255 [2022-11-26 00:44:27,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-11-26 00:44:27,691 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 293 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:27,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 371 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:44:27,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-11-26 00:44:27,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 132. [2022-11-26 00:44:27,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 109 states have (on average 1.4678899082568808) internal successors, (160), 131 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:27,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 160 transitions. [2022-11-26 00:44:27,695 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 160 transitions. Word has length 20 [2022-11-26 00:44:27,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:27,696 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 160 transitions. [2022-11-26 00:44:27,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:27,696 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 160 transitions. [2022-11-26 00:44:27,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-26 00:44:27,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:27,696 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:27,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-26 00:44:27,697 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-26 00:44:27,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:27,697 INFO L85 PathProgramCache]: Analyzing trace with hash 116840972, now seen corresponding path program 1 times [2022-11-26 00:44:27,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:27,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595411554] [2022-11-26 00:44:27,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:27,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:27,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:28,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:28,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:28,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595411554] [2022-11-26 00:44:28,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595411554] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:28,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:28,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-26 00:44:28,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518775079] [2022-11-26 00:44:28,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:28,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-26 00:44:28,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:28,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-26 00:44:28,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:44:28,137 INFO L87 Difference]: Start difference. First operand 132 states and 160 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:28,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:28,729 INFO L93 Difference]: Finished difference Result 198 states and 233 transitions. [2022-11-26 00:44:28,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:44:28,730 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-26 00:44:28,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:28,731 INFO L225 Difference]: With dead ends: 198 [2022-11-26 00:44:28,731 INFO L226 Difference]: Without dead ends: 198 [2022-11-26 00:44:28,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2022-11-26 00:44:28,732 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 225 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:28,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 366 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:44:28,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-11-26 00:44:28,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 132. [2022-11-26 00:44:28,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 109 states have (on average 1.4587155963302751) internal successors, (159), 131 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:28,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 159 transitions. [2022-11-26 00:44:28,736 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 159 transitions. Word has length 20 [2022-11-26 00:44:28,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:28,737 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 159 transitions. [2022-11-26 00:44:28,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:28,737 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 159 transitions. [2022-11-26 00:44:28,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-26 00:44:28,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:28,738 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:28,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-26 00:44:28,738 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-26 00:44:28,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:28,739 INFO L85 PathProgramCache]: Analyzing trace with hash -555968527, now seen corresponding path program 1 times [2022-11-26 00:44:28,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:28,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945562902] [2022-11-26 00:44:28,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:28,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:28,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:28,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:28,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945562902] [2022-11-26 00:44:28,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945562902] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:28,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:28,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:44:28,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277394572] [2022-11-26 00:44:28,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:28,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:44:28,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:28,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:44:28,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:44:28,776 INFO L87 Difference]: Start difference. First operand 132 states and 159 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:28,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:28,824 INFO L93 Difference]: Finished difference Result 134 states and 161 transitions. [2022-11-26 00:44:28,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:44:28,825 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-26 00:44:28,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:28,826 INFO L225 Difference]: With dead ends: 134 [2022-11-26 00:44:28,826 INFO L226 Difference]: Without dead ends: 134 [2022-11-26 00:44:28,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:44:28,827 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:28,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 138 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:44:28,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-26 00:44:28,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-11-26 00:44:28,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 111 states have (on average 1.4504504504504505) internal successors, (161), 133 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:28,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 161 transitions. [2022-11-26 00:44:28,831 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 161 transitions. Word has length 20 [2022-11-26 00:44:28,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:28,831 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 161 transitions. [2022-11-26 00:44:28,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:28,832 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 161 transitions. [2022-11-26 00:44:28,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-26 00:44:28,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:28,832 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:28,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-26 00:44:28,833 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-26 00:44:28,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:28,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1637936928, now seen corresponding path program 1 times [2022-11-26 00:44:28,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:28,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204841079] [2022-11-26 00:44:28,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:28,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:28,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:28,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:28,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:28,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204841079] [2022-11-26 00:44:28,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204841079] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:28,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:28,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:44:28,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15875595] [2022-11-26 00:44:28,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:28,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:44:28,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:28,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:44:28,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:44:28,953 INFO L87 Difference]: Start difference. First operand 134 states and 161 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:29,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:29,115 INFO L93 Difference]: Finished difference Result 140 states and 168 transitions. [2022-11-26 00:44:29,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:44:29,115 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-26 00:44:29,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:29,116 INFO L225 Difference]: With dead ends: 140 [2022-11-26 00:44:29,116 INFO L226 Difference]: Without dead ends: 140 [2022-11-26 00:44:29,116 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 [2022-11-26 00:44:29,117 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 6 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:29,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 203 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:44:29,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-26 00:44:29,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 133. [2022-11-26 00:44:29,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 111 states have (on average 1.4414414414414414) internal successors, (160), 132 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:29,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 160 transitions. [2022-11-26 00:44:29,120 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 160 transitions. Word has length 20 [2022-11-26 00:44:29,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:29,121 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 160 transitions. [2022-11-26 00:44:29,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:29,121 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 160 transitions. [2022-11-26 00:44:29,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-26 00:44:29,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:29,121 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:29,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-26 00:44:29,122 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-26 00:44:29,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:29,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1637936927, now seen corresponding path program 1 times [2022-11-26 00:44:29,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:29,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302824868] [2022-11-26 00:44:29,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:29,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:29,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:29,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:29,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:29,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302824868] [2022-11-26 00:44:29,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302824868] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:29,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:29,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:44:29,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304852332] [2022-11-26 00:44:29,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:29,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:44:29,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:29,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:44:29,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:44:29,384 INFO L87 Difference]: Start difference. First operand 133 states and 160 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:29,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:29,538 INFO L93 Difference]: Finished difference Result 132 states and 159 transitions. [2022-11-26 00:44:29,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:44:29,539 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-26 00:44:29,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:29,540 INFO L225 Difference]: With dead ends: 132 [2022-11-26 00:44:29,540 INFO L226 Difference]: Without dead ends: 132 [2022-11-26 00:44:29,540 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 [2022-11-26 00:44:29,541 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 1 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:29,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 198 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:44:29,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-26 00:44:29,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-11-26 00:44:29,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 111 states have (on average 1.4324324324324325) internal successors, (159), 131 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:29,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 159 transitions. [2022-11-26 00:44:29,544 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 159 transitions. Word has length 20 [2022-11-26 00:44:29,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:29,544 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 159 transitions. [2022-11-26 00:44:29,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:29,544 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 159 transitions. [2022-11-26 00:44:29,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-26 00:44:29,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:29,545 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:29,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-26 00:44:29,545 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-26 00:44:29,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:29,546 INFO L85 PathProgramCache]: Analyzing trace with hash -55028158, now seen corresponding path program 1 times [2022-11-26 00:44:29,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:29,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745081867] [2022-11-26 00:44:29,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:29,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:29,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:29,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:29,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:29,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745081867] [2022-11-26 00:44:29,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745081867] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:29,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:29,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:44:29,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92764224] [2022-11-26 00:44:29,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:29,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:44:29,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:29,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:44:29,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:44:29,761 INFO L87 Difference]: Start difference. First operand 132 states and 159 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:30,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:30,033 INFO L93 Difference]: Finished difference Result 194 states and 228 transitions. [2022-11-26 00:44:30,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:44:30,034 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2022-11-26 00:44:30,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:30,034 INFO L225 Difference]: With dead ends: 194 [2022-11-26 00:44:30,035 INFO L226 Difference]: Without dead ends: 194 [2022-11-26 00:44:30,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:44:30,035 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 187 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:30,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 194 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:44:30,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-11-26 00:44:30,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 137. [2022-11-26 00:44:30,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 116 states have (on average 1.4224137931034482) internal successors, (165), 136 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:30,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 165 transitions. [2022-11-26 00:44:30,039 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 165 transitions. Word has length 21 [2022-11-26 00:44:30,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:30,039 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 165 transitions. [2022-11-26 00:44:30,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:30,039 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 165 transitions. [2022-11-26 00:44:30,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-26 00:44:30,040 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:30,040 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:30,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-26 00:44:30,040 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-26 00:44:30,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:30,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1475080291, now seen corresponding path program 1 times [2022-11-26 00:44:30,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:30,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30084883] [2022-11-26 00:44:30,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:30,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:30,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:30,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:30,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:30,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30084883] [2022-11-26 00:44:30,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30084883] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:30,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:30,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-26 00:44:30,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552499697] [2022-11-26 00:44:30,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:30,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:44:30,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:30,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:44:30,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:44:30,297 INFO L87 Difference]: Start difference. First operand 137 states and 165 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:30,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:30,749 INFO L93 Difference]: Finished difference Result 201 states and 232 transitions. [2022-11-26 00:44:30,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 00:44:30,749 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-26 00:44:30,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:30,750 INFO L225 Difference]: With dead ends: 201 [2022-11-26 00:44:30,750 INFO L226 Difference]: Without dead ends: 201 [2022-11-26 00:44:30,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-11-26 00:44:30,751 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 173 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:30,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 319 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:44:30,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-11-26 00:44:30,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 137. [2022-11-26 00:44:30,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 116 states have (on average 1.4137931034482758) internal successors, (164), 136 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:30,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 164 transitions. [2022-11-26 00:44:30,755 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 164 transitions. Word has length 22 [2022-11-26 00:44:30,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:30,756 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 164 transitions. [2022-11-26 00:44:30,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:30,756 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 164 transitions. [2022-11-26 00:44:30,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-26 00:44:30,756 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:30,756 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:30,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-26 00:44:30,757 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-26 00:44:30,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:30,757 INFO L85 PathProgramCache]: Analyzing trace with hash -2141645665, now seen corresponding path program 1 times [2022-11-26 00:44:30,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:30,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837786123] [2022-11-26 00:44:30,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:30,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:30,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:30,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:30,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:30,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837786123] [2022-11-26 00:44:30,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837786123] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:30,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:30,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:44:30,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512558621] [2022-11-26 00:44:30,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:30,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:44:30,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:30,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:44:30,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:44:30,893 INFO L87 Difference]: Start difference. First operand 137 states and 164 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:31,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:31,154 INFO L93 Difference]: Finished difference Result 177 states and 212 transitions. [2022-11-26 00:44:31,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:44:31,157 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-26 00:44:31,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:31,158 INFO L225 Difference]: With dead ends: 177 [2022-11-26 00:44:31,158 INFO L226 Difference]: Without dead ends: 177 [2022-11-26 00:44:31,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:44:31,159 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 28 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:31,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 258 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:44:31,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-11-26 00:44:31,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 140. [2022-11-26 00:44:31,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 119 states have (on average 1.4201680672268908) internal successors, (169), 139 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:31,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 169 transitions. [2022-11-26 00:44:31,165 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 169 transitions. Word has length 23 [2022-11-26 00:44:31,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:31,165 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 169 transitions. [2022-11-26 00:44:31,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:31,166 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 169 transitions. [2022-11-26 00:44:31,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-26 00:44:31,166 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:31,167 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, 1, 1] [2022-11-26 00:44:31,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-26 00:44:31,167 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-26 00:44:31,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:31,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1460341743, now seen corresponding path program 1 times [2022-11-26 00:44:31,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:31,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090393714] [2022-11-26 00:44:31,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:31,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:31,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:31,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:31,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:31,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090393714] [2022-11-26 00:44:31,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090393714] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:31,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:31,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:44:31,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178240573] [2022-11-26 00:44:31,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:31,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:44:31,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:31,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:44:31,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:44:31,232 INFO L87 Difference]: Start difference. First operand 140 states and 169 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:31,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:31,307 INFO L93 Difference]: Finished difference Result 151 states and 180 transitions. [2022-11-26 00:44:31,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:44:31,308 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-26 00:44:31,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:31,309 INFO L225 Difference]: With dead ends: 151 [2022-11-26 00:44:31,309 INFO L226 Difference]: Without dead ends: 151 [2022-11-26 00:44:31,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:44:31,310 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 7 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:31,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 197 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:44:31,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-26 00:44:31,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 144. [2022-11-26 00:44:31,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 123 states have (on average 1.3902439024390243) internal successors, (171), 143 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:31,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 171 transitions. [2022-11-26 00:44:31,315 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 171 transitions. Word has length 23 [2022-11-26 00:44:31,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:31,315 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 171 transitions. [2022-11-26 00:44:31,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:31,316 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 171 transitions. [2022-11-26 00:44:31,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-26 00:44:31,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:31,316 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, 1, 1, 1] [2022-11-26 00:44:31,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-26 00:44:31,317 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-26 00:44:31,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:31,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1337804832, now seen corresponding path program 1 times [2022-11-26 00:44:31,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:31,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14192683] [2022-11-26 00:44:31,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:31,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:31,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:31,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:31,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:31,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14192683] [2022-11-26 00:44:31,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14192683] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:44:31,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363824027] [2022-11-26 00:44:31,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:31,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:31,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:44:31,598 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:44:31,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:44:31,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:31,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-26 00:44:31,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:44:31,821 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 11 treesize of output 7 [2022-11-26 00:44:31,826 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 11 treesize of output 7 [2022-11-26 00:44:31,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:31,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 00:44:31,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:31,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 00:44:31,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:31,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 00:44:31,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:31,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 00:44:31,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:31,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 00:44:31,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:31,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 00:44:32,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:44:32,139 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:44:32,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:44:32,148 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:44:32,149 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 15 treesize of output 10 [2022-11-26 00:44:32,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:32,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:44:32,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:44:32,758 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 14 treesize of output 12 [2022-11-26 00:44:32,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:44:32,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:32,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:32,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363824027] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:44:32,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [511901121] [2022-11-26 00:44:32,804 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-26 00:44:32,804 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:44:32,809 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:44:32,818 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:44:32,818 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:44:32,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:32,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:32,879 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 [2022-11-26 00:44:32,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:32,900 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 [2022-11-26 00:44:32,908 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 [2022-11-26 00:44:32,915 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 [2022-11-26 00:44:32,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:32,936 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 [2022-11-26 00:44:32,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:32,947 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 [2022-11-26 00:44:32,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:32,958 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 [2022-11-26 00:44:33,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:33,003 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 [2022-11-26 00:44:33,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:33,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:33,015 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 [2022-11-26 00:44:33,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:33,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:33,030 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 [2022-11-26 00:44:33,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:33,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:33,054 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 30 treesize of output 32 [2022-11-26 00:44:33,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:33,068 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 43 treesize of output 33 [2022-11-26 00:44:33,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:33,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:33,084 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 30 treesize of output 32 [2022-11-26 00:44:33,433 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:44:36,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [511901121] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:36,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:44:36,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [5, 5, 5] total 25 [2022-11-26 00:44:36,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970970993] [2022-11-26 00:44:36,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:36,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-26 00:44:36,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:36,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-26 00:44:36,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2022-11-26 00:44:36,723 INFO L87 Difference]: Start difference. First operand 144 states and 171 transitions. Second operand has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:37,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:37,375 INFO L93 Difference]: Finished difference Result 223 states and 258 transitions. [2022-11-26 00:44:37,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-26 00:44:37,375 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-26 00:44:37,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:37,377 INFO L225 Difference]: With dead ends: 223 [2022-11-26 00:44:37,377 INFO L226 Difference]: Without dead ends: 223 [2022-11-26 00:44:37,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2022-11-26 00:44:37,378 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 152 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:37,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 137 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:44:37,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-11-26 00:44:37,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 166. [2022-11-26 00:44:37,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 145 states have (on average 1.3517241379310345) internal successors, (196), 165 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:37,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 196 transitions. [2022-11-26 00:44:37,384 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 196 transitions. Word has length 24 [2022-11-26 00:44:37,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:37,384 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 196 transitions. [2022-11-26 00:44:37,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:37,385 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 196 transitions. [2022-11-26 00:44:37,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-26 00:44:37,385 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:37,385 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, 1, 1, 1] [2022-11-26 00:44:37,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:44:37,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-26 00:44:37,586 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-26 00:44:37,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:37,587 INFO L85 PathProgramCache]: Analyzing trace with hash 514726424, now seen corresponding path program 1 times [2022-11-26 00:44:37,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:37,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093266291] [2022-11-26 00:44:37,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:37,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:37,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:37,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:37,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:37,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093266291] [2022-11-26 00:44:37,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093266291] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:44:37,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500042993] [2022-11-26 00:44:37,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:37,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:37,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:44:37,830 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:44:37,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:44:37,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:37,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-26 00:44:37,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:44:37,973 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 11 treesize of output 7 [2022-11-26 00:44:37,979 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 11 treesize of output 7 [2022-11-26 00:44:38,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:38,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 00:44:38,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:38,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 00:44:38,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:38,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 00:44:38,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:38,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 00:44:38,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:38,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 00:44:38,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:38,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 00:44:38,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:44:38,182 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:44:38,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:44:38,191 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:44:38,191 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 15 treesize of output 10 [2022-11-26 00:44:38,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:38,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:44:38,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:44:38,688 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 14 treesize of output 12 [2022-11-26 00:44:38,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:44:38,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:38,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:38,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500042993] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:44:38,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2074033407] [2022-11-26 00:44:38,718 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-26 00:44:38,718 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:44:38,718 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:44:38,718 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:44:38,719 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:44:38,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:38,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:38,751 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 [2022-11-26 00:44:38,767 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 [2022-11-26 00:44:38,776 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 [2022-11-26 00:44:38,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:38,784 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 [2022-11-26 00:44:38,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:38,804 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 [2022-11-26 00:44:38,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:38,814 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 [2022-11-26 00:44:38,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:38,825 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 [2022-11-26 00:44:38,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:38,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:38,861 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 [2022-11-26 00:44:38,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:38,871 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 [2022-11-26 00:44:38,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:38,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:38,883 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 [2022-11-26 00:44:38,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:38,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:38,903 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 30 treesize of output 32 [2022-11-26 00:44:38,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:38,914 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 43 treesize of output 33 [2022-11-26 00:44:38,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:38,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:38,927 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 30 treesize of output 32 [2022-11-26 00:44:39,190 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:44:42,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2074033407] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:42,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:44:42,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [5, 5, 5] total 25 [2022-11-26 00:44:42,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706906442] [2022-11-26 00:44:42,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:42,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-26 00:44:42,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:42,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-26 00:44:42,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2022-11-26 00:44:42,208 INFO L87 Difference]: Start difference. First operand 166 states and 196 transitions. Second operand has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:42,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:42,789 INFO L93 Difference]: Finished difference Result 196 states and 227 transitions. [2022-11-26 00:44:42,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-26 00:44:42,789 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-26 00:44:42,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:42,790 INFO L225 Difference]: With dead ends: 196 [2022-11-26 00:44:42,790 INFO L226 Difference]: Without dead ends: 196 [2022-11-26 00:44:42,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2022-11-26 00:44:42,791 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 72 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:42,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 174 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:44:42,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-11-26 00:44:42,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 156. [2022-11-26 00:44:42,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 135 states have (on average 1.362962962962963) internal successors, (184), 155 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:42,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 184 transitions. [2022-11-26 00:44:42,795 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 184 transitions. Word has length 24 [2022-11-26 00:44:42,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:42,795 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 184 transitions. [2022-11-26 00:44:42,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:42,796 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 184 transitions. [2022-11-26 00:44:42,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-26 00:44:42,796 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:42,796 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:42,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:44:43,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-26 00:44:43,020 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-26 00:44:43,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:43,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1503725214, now seen corresponding path program 1 times [2022-11-26 00:44:43,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:43,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952048485] [2022-11-26 00:44:43,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:43,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:43,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:43,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:43,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:43,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952048485] [2022-11-26 00:44:43,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952048485] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:43,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:43,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-26 00:44:43,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544676294] [2022-11-26 00:44:43,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:43,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 00:44:43,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:43,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 00:44:43,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:44:43,589 INFO L87 Difference]: Start difference. First operand 156 states and 184 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:44,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:44,400 INFO L93 Difference]: Finished difference Result 223 states and 257 transitions. [2022-11-26 00:44:44,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 00:44:44,401 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-26 00:44:44,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:44,402 INFO L225 Difference]: With dead ends: 223 [2022-11-26 00:44:44,402 INFO L226 Difference]: Without dead ends: 223 [2022-11-26 00:44:44,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2022-11-26 00:44:44,402 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 294 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:44,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 490 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:44:44,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-11-26 00:44:44,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 158. [2022-11-26 00:44:44,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 137 states have (on average 1.3576642335766422) internal successors, (186), 157 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:44,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 186 transitions. [2022-11-26 00:44:44,406 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 186 transitions. Word has length 25 [2022-11-26 00:44:44,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:44,406 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 186 transitions. [2022-11-26 00:44:44,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:44,414 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 186 transitions. [2022-11-26 00:44:44,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-26 00:44:44,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:44,415 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, 1, 1, 1, 1, 1] [2022-11-26 00:44:44,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-26 00:44:44,415 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-26 00:44:44,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:44,417 INFO L85 PathProgramCache]: Analyzing trace with hash -22671197, now seen corresponding path program 1 times [2022-11-26 00:44:44,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:44,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881685389] [2022-11-26 00:44:44,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:44,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:44,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:44,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:44,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:44,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881685389] [2022-11-26 00:44:44,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881685389] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:44:44,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386129603] [2022-11-26 00:44:44,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:44,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:44,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:44:44,811 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:44:44,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:44:44,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:44,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-26 00:44:44,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:44:44,968 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 [2022-11-26 00:44:45,005 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:44:45,005 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 [2022-11-26 00:44:45,032 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 13 treesize of output 9 [2022-11-26 00:44:45,085 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 00:44:45,085 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 23 treesize of output 26 [2022-11-26 00:44:45,154 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:44:45,154 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 42 treesize of output 34 [2022-11-26 00:44:45,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:45,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:44:45,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386129603] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:45,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:44:45,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 17 [2022-11-26 00:44:45,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481978216] [2022-11-26 00:44:45,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:45,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-26 00:44:45,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:45,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-26 00:44:45,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-11-26 00:44:45,280 INFO L87 Difference]: Start difference. First operand 158 states and 186 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:45,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:45,756 INFO L93 Difference]: Finished difference Result 204 states and 236 transitions. [2022-11-26 00:44:45,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-26 00:44:45,756 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-26 00:44:45,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:45,757 INFO L225 Difference]: With dead ends: 204 [2022-11-26 00:44:45,757 INFO L226 Difference]: Without dead ends: 198 [2022-11-26 00:44:45,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-11-26 00:44:45,758 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 148 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:45,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 326 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:44:45,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-11-26 00:44:45,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 158. [2022-11-26 00:44:45,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 137 states have (on average 1.3503649635036497) internal successors, (185), 157 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:45,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 185 transitions. [2022-11-26 00:44:45,762 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 185 transitions. Word has length 26 [2022-11-26 00:44:45,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:45,762 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 185 transitions. [2022-11-26 00:44:45,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:45,763 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 185 transitions. [2022-11-26 00:44:45,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-26 00:44:45,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:45,763 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, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:45,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:44:45,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:45,969 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-26 00:44:45,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:45,969 INFO L85 PathProgramCache]: Analyzing trace with hash -2088808655, now seen corresponding path program 1 times [2022-11-26 00:44:45,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:45,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031952512] [2022-11-26 00:44:45,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:45,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:45,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:46,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:46,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:46,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031952512] [2022-11-26 00:44:46,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031952512] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:44:46,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916896170] [2022-11-26 00:44:46,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:46,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:46,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:44:46,371 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:44:46,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:44:46,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:46,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-26 00:44:46,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:44:46,521 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 [2022-11-26 00:44:46,544 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 11 treesize of output 7 [2022-11-26 00:44:46,553 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 11 treesize of output 7 [2022-11-26 00:44:46,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:46,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 00:44:46,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:46,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 00:44:46,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:46,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 00:44:46,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:46,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 00:44:46,633 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:44:46,633 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 [2022-11-26 00:44:46,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:46,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 00:44:46,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:46,669 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 [2022-11-26 00:44:46,744 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 00:44:46,744 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 42 treesize of output 41 [2022-11-26 00:44:46,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-26 00:44:46,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:44:46,933 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:44:46,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:44:46,940 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:44:46,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 14 [2022-11-26 00:44:46,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:46,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:44:47,993 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:44:47,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 39 [2022-11-26 00:44:47,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:44:48,005 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:44:48,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 36 [2022-11-26 00:44:48,014 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 9 treesize of output 7 [2022-11-26 00:44:48,055 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:44:48,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 39 [2022-11-26 00:44:48,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:44:48,068 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-26 00:44:48,068 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 16 treesize of output 11 [2022-11-26 00:44:48,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:48,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916896170] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:44:48,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [432944955] [2022-11-26 00:44:48,163 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-26 00:44:48,163 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:44:48,164 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:44:48,164 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:44:48,164 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:44:48,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:48,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:48,186 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 [2022-11-26 00:44:48,202 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 [2022-11-26 00:44:48,209 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 [2022-11-26 00:44:48,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:48,219 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 [2022-11-26 00:44:48,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:48,238 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 [2022-11-26 00:44:48,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:48,248 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 [2022-11-26 00:44:48,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:48,260 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 [2022-11-26 00:44:48,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:48,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:48,293 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 [2022-11-26 00:44:48,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:48,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:48,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:48,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:48,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:48,310 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 [2022-11-26 00:44:48,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:48,322 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 [2022-11-26 00:44:48,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:48,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:48,335 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 [2022-11-26 00:44:48,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:48,356 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 43 treesize of output 33 [2022-11-26 00:44:48,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:48,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:48,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-26 00:44:48,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:48,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:48,384 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 30 treesize of output 32 [2022-11-26 00:44:48,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:48,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:48,431 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:44:48,431 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 4 new quantified variables, introduced 1 case distinctions, treesize of input 209 treesize of output 139 [2022-11-26 00:44:48,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:48,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:48,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:48,453 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 110 [2022-11-26 00:44:48,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:48,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:48,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:48,468 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 69 treesize of output 33 [2022-11-26 00:44:48,991 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:44:54,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [432944955] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:54,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:44:54,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [9, 8, 9] total 39 [2022-11-26 00:44:54,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336320912] [2022-11-26 00:44:54,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:54,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-26 00:44:54,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:54,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-26 00:44:54,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=1137, Unknown=10, NotChecked=0, Total=1482 [2022-11-26 00:44:54,548 INFO L87 Difference]: Start difference. First operand 158 states and 185 transitions. Second operand has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:55,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:55,326 INFO L93 Difference]: Finished difference Result 125 states and 136 transitions. [2022-11-26 00:44:55,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-26 00:44:55,327 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-26 00:44:55,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:55,328 INFO L225 Difference]: With dead ends: 125 [2022-11-26 00:44:55,328 INFO L226 Difference]: Without dead ends: 123 [2022-11-26 00:44:55,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 43 SyntacticMatches, 10 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=335, Invalid=1137, Unknown=10, NotChecked=0, Total=1482 [2022-11-26 00:44:55,329 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 78 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:55,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 121 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 00:44:55,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-11-26 00:44:55,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2022-11-26 00:44:55,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 75 states have (on average 1.3333333333333333) internal successors, (100), 86 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:55,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2022-11-26 00:44:55,332 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 27 [2022-11-26 00:44:55,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:55,332 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2022-11-26 00:44:55,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:55,332 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2022-11-26 00:44:55,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-26 00:44:55,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:55,333 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:55,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-26 00:44:55,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-26 00:44:55,539 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-26 00:44:55,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:55,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1942698414, now seen corresponding path program 1 times [2022-11-26 00:44:55,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:55,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248324780] [2022-11-26 00:44:55,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:55,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:55,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:56,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:56,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:56,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248324780] [2022-11-26 00:44:56,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248324780] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:44:56,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433977199] [2022-11-26 00:44:56,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:56,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:56,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:44:56,004 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:44:56,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:44:56,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:56,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-26 00:44:56,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:44:56,171 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 [2022-11-26 00:44:56,193 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:44:56,194 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 [2022-11-26 00:44:56,206 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 13 treesize of output 9 [2022-11-26 00:44:56,213 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 [2022-11-26 00:44:56,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2022-11-26 00:44:56,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:44:56,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:44:56,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:44:56,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:44:56,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433977199] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:56,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:44:56,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 11 [2022-11-26 00:44:56,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447322221] [2022-11-26 00:44:56,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:56,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-26 00:44:56,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:56,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-26 00:44:56,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:44:56,365 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:56,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:56,846 INFO L93 Difference]: Finished difference Result 150 states and 168 transitions. [2022-11-26 00:44:56,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 00:44:56,846 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 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 32 [2022-11-26 00:44:56,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:56,847 INFO L225 Difference]: With dead ends: 150 [2022-11-26 00:44:56,847 INFO L226 Difference]: Without dead ends: 150 [2022-11-26 00:44:56,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-11-26 00:44:56,848 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 181 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:56,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 213 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:44:56,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-26 00:44:56,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 110. [2022-11-26 00:44:56,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 98 states have (on average 1.2857142857142858) internal successors, (126), 109 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) [2022-11-26 00:44:56,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 126 transitions. [2022-11-26 00:44:56,851 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 126 transitions. Word has length 32 [2022-11-26 00:44:56,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:56,852 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 126 transitions. [2022-11-26 00:44:56,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:56,852 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 126 transitions. [2022-11-26 00:44:56,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-26 00:44:56,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:56,852 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:56,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:44:57,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-26 00:44:57,053 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-26 00:44:57,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:57,053 INFO L85 PathProgramCache]: Analyzing trace with hash -94108441, now seen corresponding path program 1 times [2022-11-26 00:44:57,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:57,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656217425] [2022-11-26 00:44:57,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:57,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:57,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:57,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:57,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:57,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656217425] [2022-11-26 00:44:57,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656217425] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:44:57,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165504192] [2022-11-26 00:44:57,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:57,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:57,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:44:57,416 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:44:57,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:44:57,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:57,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-26 00:44:57,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:44:57,591 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 [2022-11-26 00:44:57,615 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:44:57,615 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 [2022-11-26 00:44:57,630 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 13 treesize of output 9 [2022-11-26 00:44:57,678 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 00:44:57,679 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 34 treesize of output 35 [2022-11-26 00:44:57,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-26 00:44:57,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:44:57,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:44:57,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165504192] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:57,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:44:57,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 12 [2022-11-26 00:44:57,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807831848] [2022-11-26 00:44:57,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:57,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:44:57,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:57,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:44:57,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:44:57,908 INFO L87 Difference]: Start difference. First operand 110 states and 126 transitions. Second operand has 9 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:58,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:58,427 INFO L93 Difference]: Finished difference Result 139 states and 155 transitions. [2022-11-26 00:44:58,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:44:58,427 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 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 33 [2022-11-26 00:44:58,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:58,428 INFO L225 Difference]: With dead ends: 139 [2022-11-26 00:44:58,428 INFO L226 Difference]: Without dead ends: 139 [2022-11-26 00:44:58,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2022-11-26 00:44:58,429 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 124 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:58,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 204 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:44:58,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-26 00:44:58,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 111. [2022-11-26 00:44:58,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 99 states have (on average 1.2828282828282829) internal successors, (127), 110 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:58,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 127 transitions. [2022-11-26 00:44:58,433 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 127 transitions. Word has length 33 [2022-11-26 00:44:58,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:58,434 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 127 transitions. [2022-11-26 00:44:58,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:58,434 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 127 transitions. [2022-11-26 00:44:58,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-26 00:44:58,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:58,435 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:58,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-26 00:44:58,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:58,641 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr67ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-26 00:44:58,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:58,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1377605876, now seen corresponding path program 1 times [2022-11-26 00:44:58,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:58,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471170359] [2022-11-26 00:44:58,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:58,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:58,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:59,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:59,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:59,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471170359] [2022-11-26 00:44:59,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471170359] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:44:59,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484439341] [2022-11-26 00:44:59,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:59,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:59,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:44:59,008 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:44:59,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:44:59,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:59,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-26 00:44:59,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:44:59,197 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 [2022-11-26 00:44:59,231 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:44:59,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-26 00:44:59,263 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 13 treesize of output 9 [2022-11-26 00:44:59,343 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 00:44:59,344 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 34 treesize of output 35 [2022-11-26 00:44:59,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-26 00:44:59,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:44:59,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:44:59,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484439341] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:59,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:44:59,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2022-11-26 00:44:59,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295337263] [2022-11-26 00:44:59,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:59,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:44:59,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:59,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:44:59,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-11-26 00:44:59,687 INFO L87 Difference]: Start difference. First operand 111 states and 127 transitions. Second operand has 9 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:45:00,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:45:00,125 INFO L93 Difference]: Finished difference Result 130 states and 146 transitions. [2022-11-26 00:45:00,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:45:00,125 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-26 00:45:00,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:45:00,126 INFO L225 Difference]: With dead ends: 130 [2022-11-26 00:45:00,126 INFO L226 Difference]: Without dead ends: 130 [2022-11-26 00:45:00,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-11-26 00:45:00,127 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 87 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:45:00,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 183 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:45:00,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-26 00:45:00,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 112. [2022-11-26 00:45:00,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 100 states have (on average 1.28) internal successors, (128), 111 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:45:00,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 128 transitions. [2022-11-26 00:45:00,130 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 128 transitions. Word has length 34 [2022-11-26 00:45:00,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:45:00,130 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 128 transitions. [2022-11-26 00:45:00,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:45:00,130 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 128 transitions. [2022-11-26 00:45:00,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-26 00:45:00,131 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:45:00,131 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:45:00,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:45:00,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-26 00:45:00,332 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr71ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-26 00:45:00,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:45:00,332 INFO L85 PathProgramCache]: Analyzing trace with hash 83375409, now seen corresponding path program 1 times [2022-11-26 00:45:00,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:45:00,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382582098] [2022-11-26 00:45:00,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:45:00,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:45:00,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:45:00,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:45:00,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:45:00,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382582098] [2022-11-26 00:45:00,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382582098] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:45:00,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291081548] [2022-11-26 00:45:00,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:45:00,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:45:00,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:45:00,587 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:45:00,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:45:00,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:45:00,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-26 00:45:00,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:45:00,980 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:45:00,981 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 19 treesize of output 15 [2022-11-26 00:45:01,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:45:01,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:45:01,338 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-26 00:45:01,339 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 20 treesize of output 15 [2022-11-26 00:45:01,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:45:01,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291081548] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:45:01,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [937176436] [2022-11-26 00:45:01,407 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-26 00:45:01,407 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:45:01,407 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:45:01,408 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:45:01,408 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:45:01,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:01,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:01,454 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 [2022-11-26 00:45:01,472 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 [2022-11-26 00:45:01,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:01,481 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 [2022-11-26 00:45:01,489 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 [2022-11-26 00:45:01,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:01,505 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 [2022-11-26 00:45:01,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:01,514 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 [2022-11-26 00:45:01,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:01,526 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 [2022-11-26 00:45:01,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:01,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:01,560 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 [2022-11-26 00:45:01,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:01,569 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 [2022-11-26 00:45:01,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:01,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:01,592 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 [2022-11-26 00:45:01,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:01,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:01,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:01,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:01,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:01,608 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 [2022-11-26 00:45:01,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:01,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:01,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-26 00:45:01,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:01,656 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 43 treesize of output 33 [2022-11-26 00:45:01,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:01,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:01,668 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 30 treesize of output 32 [2022-11-26 00:45:01,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:01,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:01,714 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:45:01,714 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 4 new quantified variables, introduced 1 case distinctions, treesize of input 209 treesize of output 139 [2022-11-26 00:45:01,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:01,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:01,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:01,730 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 110 [2022-11-26 00:45:01,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:01,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:01,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:01,744 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 57 treesize of output 33 [2022-11-26 00:45:02,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:45:02,344 INFO L321 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2022-11-26 00:45:02,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 78 [2022-11-26 00:45:02,473 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:45:08,964 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10559#(and (<= 0 |#NULL.base|) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= |ULTIMATE.start_main_~x~0#1.offset| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1.base| 0) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~head~0#1.offset| 0) (or (= |ULTIMATE.start_main_~x~0#1.base| |ULTIMATE.start_main_~head~0#1.base|) (and (<= (+ |ULTIMATE.start_main_~head~0#1.offset| 16) (select |#length| |ULTIMATE.start_main_~head~0#1.base|)) (< |ULTIMATE.start_main_~head~0#1.base| |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|) |ULTIMATE.start_main_~x~0#1.offset|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~head~0#1.base|) (+ |ULTIMATE.start_main_~head~0#1.offset| 12)) 2)) (= |ULTIMATE.start_main_~x~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|)) (= (select |#valid| |ULTIMATE.start_main_~head~0#1.base|) 0))) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_main_~head~0#1.offset|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2022-11-26 00:45:08,965 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:45:08,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:45:08,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2022-11-26 00:45:08,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566730268] [2022-11-26 00:45:08,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:45:08,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-26 00:45:08,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:45:08,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-26 00:45:08,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=1840, Unknown=0, NotChecked=0, Total=2256 [2022-11-26 00:45:08,967 INFO L87 Difference]: Start difference. First operand 112 states and 128 transitions. Second operand has 22 states, 22 states have (on average 3.8181818181818183) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:45:09,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:45:09,499 INFO L93 Difference]: Finished difference Result 148 states and 159 transitions. [2022-11-26 00:45:09,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-26 00:45:09,500 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.8181818181818183) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 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 35 [2022-11-26 00:45:09,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:45:09,501 INFO L225 Difference]: With dead ends: 148 [2022-11-26 00:45:09,501 INFO L226 Difference]: Without dead ends: 148 [2022-11-26 00:45:09,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 60 SyntacticMatches, 7 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1303 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=489, Invalid=2163, Unknown=0, NotChecked=0, Total=2652 [2022-11-26 00:45:09,502 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 100 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:45:09,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 364 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:45:09,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-26 00:45:09,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 110. [2022-11-26 00:45:09,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 98 states have (on average 1.2653061224489797) internal successors, (124), 109 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:45:09,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 124 transitions. [2022-11-26 00:45:09,506 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 124 transitions. Word has length 35 [2022-11-26 00:45:09,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:45:09,506 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 124 transitions. [2022-11-26 00:45:09,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.8181818181818183) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:45:09,507 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 124 transitions. [2022-11-26 00:45:09,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-26 00:45:09,507 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:45:09,507 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:45:09,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:45:09,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-26 00:45:09,713 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr69ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-26 00:45:09,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:45:09,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1029327862, now seen corresponding path program 1 times [2022-11-26 00:45:09,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:45:09,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267085654] [2022-11-26 00:45:09,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:45:09,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:45:09,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:45:09,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:45:09,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:45:09,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267085654] [2022-11-26 00:45:09,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267085654] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:45:09,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:45:09,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:45:09,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038164008] [2022-11-26 00:45:09,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:45:09,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:45:09,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:45:09,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:45:09,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:45:09,827 INFO L87 Difference]: Start difference. First operand 110 states and 124 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:45:09,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:45:09,950 INFO L93 Difference]: Finished difference Result 142 states and 153 transitions. [2022-11-26 00:45:09,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:45:09,950 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2022-11-26 00:45:09,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:45:09,951 INFO L225 Difference]: With dead ends: 142 [2022-11-26 00:45:09,951 INFO L226 Difference]: Without dead ends: 142 [2022-11-26 00:45:09,951 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 [2022-11-26 00:45:09,952 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 58 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:45:09,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 76 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:45:09,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-11-26 00:45:09,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 111. [2022-11-26 00:45:09,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 99 states have (on average 1.2626262626262625) internal successors, (125), 110 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:45:09,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 125 transitions. [2022-11-26 00:45:09,955 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 125 transitions. Word has length 36 [2022-11-26 00:45:09,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:45:09,956 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 125 transitions. [2022-11-26 00:45:09,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:45:09,956 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 125 transitions. [2022-11-26 00:45:09,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-26 00:45:09,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:45:09,957 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:45:09,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-26 00:45:09,957 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr70ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-26 00:45:09,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:45:09,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1844392910, now seen corresponding path program 1 times [2022-11-26 00:45:09,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:45:09,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569799331] [2022-11-26 00:45:09,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:45:09,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:45:09,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:45:10,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:45:10,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:45:10,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569799331] [2022-11-26 00:45:10,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569799331] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:45:10,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339317008] [2022-11-26 00:45:10,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:45:10,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:45:10,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:45:10,423 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:45:10,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:45:10,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:45:10,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-26 00:45:10,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:45:11,137 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:45:11,138 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 45 treesize of output 41 [2022-11-26 00:45:11,149 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:45:11,149 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 39 treesize of output 35 [2022-11-26 00:45:11,313 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:45:11,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-26 00:45:11,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:45:11,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:45:11,555 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 36 treesize of output 32 [2022-11-26 00:45:11,936 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-26 00:45:11,937 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 30 treesize of output 25 [2022-11-26 00:45:11,946 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-26 00:45:11,947 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 24 treesize of output 12 [2022-11-26 00:45:12,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:45:12,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339317008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:45:12,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1341870655] [2022-11-26 00:45:12,046 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2022-11-26 00:45:12,046 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:45:12,047 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:45:12,047 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:45:12,047 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:45:12,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:12,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:12,072 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 [2022-11-26 00:45:12,086 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 [2022-11-26 00:45:12,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:12,094 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 [2022-11-26 00:45:12,103 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 [2022-11-26 00:45:12,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:12,124 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 [2022-11-26 00:45:12,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:12,134 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 [2022-11-26 00:45:12,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:12,144 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 [2022-11-26 00:45:12,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:12,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:12,175 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 [2022-11-26 00:45:12,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:12,184 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 [2022-11-26 00:45:12,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:12,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:12,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:12,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:12,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:12,199 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 [2022-11-26 00:45:12,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:12,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:12,212 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 [2022-11-26 00:45:12,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:12,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:12,238 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 30 treesize of output 32 [2022-11-26 00:45:12,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:12,248 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 43 treesize of output 33 [2022-11-26 00:45:12,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:12,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:12,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-26 00:45:12,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:12,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:12,310 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:45:12,311 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 4 new quantified variables, introduced 1 case distinctions, treesize of input 209 treesize of output 139 [2022-11-26 00:45:12,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:12,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:12,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:12,333 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 110 [2022-11-26 00:45:12,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:12,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:12,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:12,348 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 69 treesize of output 33 [2022-11-26 00:45:12,786 INFO L321 Elim1Store]: treesize reduction 31, result has 32.6 percent of original size [2022-11-26 00:45:12,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 43 [2022-11-26 00:45:12,805 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:45:19,405 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11357#(and (<= (+ |ULTIMATE.start_main_~head~0#1.offset| 16) (select |#length| |ULTIMATE.start_main_~head~0#1.base|)) (not (= |ULTIMATE.start_main_~head~0#1.base| 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~head~0#1.base|) (+ |ULTIMATE.start_main_~head~0#1.offset| 12)) 2) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~head~0#1.base|) (+ |ULTIMATE.start_main_~head~0#1.offset| 8)) 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|) |ULTIMATE.start_main_~x~0#1.offset|) (< (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~head~0#1.base|) (+ |ULTIMATE.start_main_~head~0#1.offset| 8)) |#StackHeapBarrier|) (= (select |#valid| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~head~0#1.base|) (+ |ULTIMATE.start_main_~head~0#1.offset| 8))) 0) (= |ULTIMATE.start_main_~head~0#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~head~0#1.base|) (+ |ULTIMATE.start_main_~head~0#1.offset| 8)) |ULTIMATE.start_main_~head~0#1.base|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:45:19,405 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:45:19,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:45:19,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 29 [2022-11-26 00:45:19,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452852041] [2022-11-26 00:45:19,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:45:19,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-26 00:45:19,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:45:19,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-26 00:45:19,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=598, Invalid=2824, Unknown=0, NotChecked=0, Total=3422 [2022-11-26 00:45:19,408 INFO L87 Difference]: Start difference. First operand 111 states and 125 transitions. Second operand has 31 states, 30 states have (on average 3.5) internal successors, (105), 30 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:45:21,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:45:21,549 INFO L93 Difference]: Finished difference Result 154 states and 163 transitions. [2022-11-26 00:45:21,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-26 00:45:21,550 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.5) internal successors, (105), 30 states have internal predecessors, (105), 0 states have call successors, (0), 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 37 [2022-11-26 00:45:21,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:45:21,553 INFO L225 Difference]: With dead ends: 154 [2022-11-26 00:45:21,553 INFO L226 Difference]: Without dead ends: 154 [2022-11-26 00:45:21,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 57 SyntacticMatches, 7 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2720 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=1121, Invalid=5199, Unknown=0, NotChecked=0, Total=6320 [2022-11-26 00:45:21,555 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 507 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:45:21,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [507 Valid, 273 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 00:45:21,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-26 00:45:21,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 111. [2022-11-26 00:45:21,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 99 states have (on average 1.2626262626262625) internal successors, (125), 110 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:45:21,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 125 transitions. [2022-11-26 00:45:21,559 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 125 transitions. Word has length 37 [2022-11-26 00:45:21,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:45:21,560 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 125 transitions. [2022-11-26 00:45:21,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.5) internal successors, (105), 30 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:45:21,560 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 125 transitions. [2022-11-26 00:45:21,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-26 00:45:21,561 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:45:21,561 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:45:21,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 00:45:21,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:45:21,766 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr71ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-26 00:45:21,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:45:21,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1359897450, now seen corresponding path program 1 times [2022-11-26 00:45:21,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:45:21,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396689076] [2022-11-26 00:45:21,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:45:21,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:45:21,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:45:22,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:45:22,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:45:22,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396689076] [2022-11-26 00:45:22,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396689076] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:45:22,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654390270] [2022-11-26 00:45:22,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:45:22,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:45:22,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:45:22,777 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:45:22,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 00:45:22,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:45:22,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-26 00:45:22,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:45:23,065 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 [2022-11-26 00:45:23,173 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 00:45:23,174 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 36 treesize of output 37 [2022-11-26 00:45:23,405 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:45:23,406 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 35 treesize of output 29 [2022-11-26 00:45:23,684 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main_~head~0#1.base| Int)) (and (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~head~0#1.base|) 0) (exists ((|v_ULTIMATE.start_main_#t~mem25#1.base_13| Int)) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~head~0#1.base| 1))) (and (= (select .cse0 |v_ULTIMATE.start_main_#t~mem25#1.base_13|) 0) (= |c_#valid| (store (store .cse0 |v_ULTIMATE.start_main_#t~mem25#1.base_13| 0) |ULTIMATE.start_main_~head~0#1.base| 0))))))) is different from true [2022-11-26 00:45:23,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-11-26 00:45:23,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:45:23,942 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1503 (Array Int Int))) (= |c_ULTIMATE.start_main_old_#valid#1| (store (store |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1503) |c_ULTIMATE.start_main_~head~0#1.base|) 8) 0) |c_ULTIMATE.start_main_~head~0#1.base| 0))) is different from false [2022-11-26 00:45:23,947 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1503 (Array Int Int))) (= (store (store |c_#valid| (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~head~0#1.base|) (+ |c_ULTIMATE.start_main_~head~0#1.offset| 8)) v_ArrVal_1503) |c_ULTIMATE.start_main_~head~0#1.base|) 8) 0) |c_ULTIMATE.start_main_~head~0#1.base| 0) |c_ULTIMATE.start_main_old_#valid#1|)) is different from false [2022-11-26 00:45:23,954 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:45:23,954 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 30 treesize of output 31 [2022-11-26 00:45:23,960 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:45:23,961 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 52 treesize of output 50 [2022-11-26 00:45:23,965 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 19 treesize of output 17 [2022-11-26 00:45:26,038 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse4 (= |c_ULTIMATE.start_main_#t~malloc3#1.base| |c_ULTIMATE.start_main_~head~0#1.base|))) (let ((.cse1 (store (store |c_#valid| |c_ULTIMATE.start_main_#t~malloc3#1.base| 0) |c_ULTIMATE.start_main_~head~0#1.base| 0)) (.cse2 (or (not .cse4) (forall ((v_antiDerIndex_entry0_1 Int) (v_arrayElimCell_228 Int)) (= (select |c_ULTIMATE.start_main_old_#valid#1| v_antiDerIndex_entry0_1) (select (store (store |c_#valid| v_arrayElimCell_228 0) |c_ULTIMATE.start_main_~head~0#1.base| 0) v_antiDerIndex_entry0_1))))) (.cse3 (= |c_ULTIMATE.start_main_~head~0#1.offset| 0))) (and (forall ((v_antiDerIndex_entry0_1 Int) (v_arrayElimCell_228 Int)) (let ((.cse0 (select |c_ULTIMATE.start_main_old_#valid#1| v_antiDerIndex_entry0_1))) (or (= .cse0 (select (store (store |c_#valid| v_arrayElimCell_228 0) |c_ULTIMATE.start_main_~head~0#1.base| 0) v_antiDerIndex_entry0_1)) (= .cse0 (select .cse1 v_antiDerIndex_entry0_1))))) .cse2 (or (and (forall ((v_antiDerIndex_entry0_1 Int)) (= (select |c_ULTIMATE.start_main_old_#valid#1| v_antiDerIndex_entry0_1) (select .cse1 v_antiDerIndex_entry0_1))) (or (forall ((v_antiDerIndex_entry0_1 Int) (v_arrayElimCell_226 Int)) (= (select |c_ULTIMATE.start_main_old_#valid#1| v_antiDerIndex_entry0_1) (select (store (store |c_#valid| v_arrayElimCell_226 0) |c_ULTIMATE.start_main_~head~0#1.base| 0) v_antiDerIndex_entry0_1))) .cse3)) .cse4) (or (and (forall ((v_antiDerIndex_entry0_1 Int) (v_arrayElimCell_228 Int)) (let ((.cse5 (select |c_ULTIMATE.start_main_old_#valid#1| v_antiDerIndex_entry0_1))) (or (= .cse5 (select (store (store |c_#valid| v_arrayElimCell_228 0) |c_ULTIMATE.start_main_~head~0#1.base| 0) v_antiDerIndex_entry0_1)) (forall ((v_arrayElimCell_226 Int)) (= .cse5 (select (store (store |c_#valid| v_arrayElimCell_226 0) |c_ULTIMATE.start_main_~head~0#1.base| 0) v_antiDerIndex_entry0_1)))))) .cse2) .cse3)))) is different from false [2022-11-26 00:45:40,161 WARN L233 SmtUtils]: Spent 13.87s on a formula simplification. DAG size of input: 57 DAG size of output: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:45:40,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:45:40,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654390270] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:45:40,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1935247679] [2022-11-26 00:45:40,292 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2022-11-26 00:45:40,293 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:45:40,293 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:45:40,293 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:45:40,293 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:45:40,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:40,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:40,321 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 [2022-11-26 00:45:40,333 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 [2022-11-26 00:45:40,339 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 [2022-11-26 00:45:40,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:40,349 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 [2022-11-26 00:45:40,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:40,366 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 [2022-11-26 00:45:40,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:40,375 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 [2022-11-26 00:45:40,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:40,385 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 [2022-11-26 00:45:40,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:40,415 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 [2022-11-26 00:45:40,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:40,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:40,425 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 [2022-11-26 00:45:40,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:40,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:40,437 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 [2022-11-26 00:45:40,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:40,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:40,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:40,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:40,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:40,456 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 [2022-11-26 00:45:40,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:40,482 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 43 treesize of output 33 [2022-11-26 00:45:40,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:40,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:40,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-26 00:45:40,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:40,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:40,511 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 30 treesize of output 32 [2022-11-26 00:45:40,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:40,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:40,563 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:45:40,563 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 4 new quantified variables, introduced 1 case distinctions, treesize of input 209 treesize of output 139 [2022-11-26 00:45:40,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:40,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:40,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:40,580 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 110 [2022-11-26 00:45:40,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:40,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:40,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:40,596 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 57 treesize of output 33 [2022-11-26 00:45:41,075 INFO L321 Elim1Store]: treesize reduction 31, result has 32.6 percent of original size [2022-11-26 00:45:41,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 43 [2022-11-26 00:45:41,112 INFO L321 Elim1Store]: treesize reduction 36, result has 37.9 percent of original size [2022-11-26 00:45:41,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 33 [2022-11-26 00:45:41,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-26 00:45:41,263 INFO L321 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2022-11-26 00:45:41,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-26 00:45:41,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-26 00:45:41,375 INFO L321 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2022-11-26 00:45:41,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-26 00:45:41,407 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:45:48,583 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11954#(and (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= |ULTIMATE.start_main_~x~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1.base| 0) (= |ULTIMATE.start_main_~head~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:45:48,583 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:45:48,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:45:48,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 32 [2022-11-26 00:45:48,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766301942] [2022-11-26 00:45:48,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:45:48,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-26 00:45:48,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:45:48,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-26 00:45:48,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=2979, Unknown=4, NotChecked=468, Total=3906 [2022-11-26 00:45:48,586 INFO L87 Difference]: Start difference. First operand 111 states and 125 transitions. Second operand has 34 states, 33 states have (on average 3.484848484848485) internal successors, (115), 33 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:45:57,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:45:57,418 INFO L93 Difference]: Finished difference Result 148 states and 163 transitions. [2022-11-26 00:45:57,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 00:45:57,418 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.484848484848485) internal successors, (115), 33 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-26 00:45:57,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:45:57,420 INFO L225 Difference]: With dead ends: 148 [2022-11-26 00:45:57,420 INFO L226 Difference]: Without dead ends: 147 [2022-11-26 00:45:57,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 64 SyntacticMatches, 7 SemanticMatches, 73 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1749 ImplicationChecksByTransitivity, 31.0s TimeCoverageRelationStatistics Valid=613, Invalid=4369, Unknown=4, NotChecked=564, Total=5550 [2022-11-26 00:45:57,423 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 212 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 1396 mSolverCounterSat, 40 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 1886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1396 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 449 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:45:57,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 783 Invalid, 1886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1396 Invalid, 1 Unknown, 449 Unchecked, 1.7s Time] [2022-11-26 00:45:57,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-26 00:45:57,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 115. [2022-11-26 00:45:57,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 103 states have (on average 1.2524271844660195) internal successors, (129), 114 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) [2022-11-26 00:45:57,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 129 transitions. [2022-11-26 00:45:57,429 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 129 transitions. Word has length 39 [2022-11-26 00:45:57,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:45:57,432 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 129 transitions. [2022-11-26 00:45:57,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.484848484848485) internal successors, (115), 33 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:45:57,433 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 129 transitions. [2022-11-26 00:45:57,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-26 00:45:57,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:45:57,434 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:45:57,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 00:45:57,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:45:57,640 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-26 00:45:57,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:45:57,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1359899311, now seen corresponding path program 1 times [2022-11-26 00:45:57,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:45:57,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585199519] [2022-11-26 00:45:57,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:45:57,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:45:57,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:45:57,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:45:57,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:45:57,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585199519] [2022-11-26 00:45:57,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585199519] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:45:57,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750267775] [2022-11-26 00:45:57,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:45:57,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:45:57,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:45:57,809 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:45:57,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 00:45:58,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:45:58,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-26 00:45:58,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:45:58,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:45:58,225 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:45:58,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:45:58,235 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:45:58,236 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 15 treesize of output 10 [2022-11-26 00:45:58,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:45:58,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:45:58,432 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:45:58,433 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 42 treesize of output 45 [2022-11-26 00:45:58,447 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:45:58,447 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 38 treesize of output 41 [2022-11-26 00:45:58,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:45:58,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750267775] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:45:58,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1038175284] [2022-11-26 00:45:58,809 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2022-11-26 00:45:58,809 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:45:58,810 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:45:58,810 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:45:58,810 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:45:58,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:58,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:58,838 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 [2022-11-26 00:45:58,852 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 [2022-11-26 00:45:58,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:58,861 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 [2022-11-26 00:45:58,868 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 [2022-11-26 00:45:58,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:58,884 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 [2022-11-26 00:45:58,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:58,893 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 [2022-11-26 00:45:58,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:58,904 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 [2022-11-26 00:45:58,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:58,944 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 [2022-11-26 00:45:58,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:58,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:58,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:58,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:58,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:58,960 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 [2022-11-26 00:45:58,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:58,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:58,972 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 [2022-11-26 00:45:58,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:58,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:58,984 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 [2022-11-26 00:45:59,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:59,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:59,003 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 30 treesize of output 32 [2022-11-26 00:45:59,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:59,011 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 43 treesize of output 33 [2022-11-26 00:45:59,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:59,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:59,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-26 00:45:59,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:59,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:59,072 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:45:59,073 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 4 new quantified variables, introduced 1 case distinctions, treesize of input 209 treesize of output 139 [2022-11-26 00:45:59,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:59,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:59,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:59,090 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 110 [2022-11-26 00:45:59,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:59,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:59,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:59,103 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 57 treesize of output 33 [2022-11-26 00:45:59,570 INFO L321 Elim1Store]: treesize reduction 31, result has 32.6 percent of original size [2022-11-26 00:45:59,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 43 [2022-11-26 00:45:59,607 INFO L321 Elim1Store]: treesize reduction 36, result has 37.9 percent of original size [2022-11-26 00:45:59,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 33 [2022-11-26 00:45:59,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-26 00:45:59,759 INFO L321 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2022-11-26 00:45:59,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-26 00:45:59,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-26 00:45:59,867 INFO L321 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2022-11-26 00:45:59,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-26 00:45:59,900 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:46:05,915 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12512#(and (not (= (select |#valid| |ULTIMATE.start_main_~x~0#1.base|) 1)) (= |ULTIMATE.start_main_~head~0#1.offset| |ULTIMATE.start_main_~x~0#1.offset|) (= |ULTIMATE.start_main_~x~0#1.base| |ULTIMATE.start_main_~head~0#1.base|) (= |#NULL.offset| 0) (or (not (= |ULTIMATE.start_main_~x~0#1.base| 0)) (not (= |ULTIMATE.start_main_~x~0#1.offset| 0))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:46:05,916 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:46:05,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:46:05,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-11-26 00:46:05,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203006857] [2022-11-26 00:46:05,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:46:05,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-26 00:46:05,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:46:05,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-26 00:46:05,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1311, Unknown=0, NotChecked=0, Total=1640 [2022-11-26 00:46:05,918 INFO L87 Difference]: Start difference. First operand 115 states and 129 transitions. Second operand has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 13 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:46:06,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:46:06,927 INFO L93 Difference]: Finished difference Result 214 states and 229 transitions. [2022-11-26 00:46:06,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 00:46:06,928 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 13 states have internal predecessors, (84), 0 states have call successors, (0), 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 39 [2022-11-26 00:46:06,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:46:06,929 INFO L225 Difference]: With dead ends: 214 [2022-11-26 00:46:06,929 INFO L226 Difference]: Without dead ends: 202 [2022-11-26 00:46:06,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 77 SyntacticMatches, 9 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=456, Invalid=1896, Unknown=0, NotChecked=0, Total=2352 [2022-11-26 00:46:06,937 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 330 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:46:06,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 211 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:46:06,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-11-26 00:46:06,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 153. [2022-11-26 00:46:06,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 141 states have (on average 1.2127659574468086) internal successors, (171), 152 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:46:06,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 171 transitions. [2022-11-26 00:46:06,945 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 171 transitions. Word has length 39 [2022-11-26 00:46:06,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:46:06,946 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 171 transitions. [2022-11-26 00:46:06,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 13 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:46:06,946 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 171 transitions. [2022-11-26 00:46:06,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-26 00:46:06,947 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:46:06,947 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:46:06,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 00:46:07,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-26 00:46:07,153 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-26 00:46:07,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:46:07,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1029342898, now seen corresponding path program 1 times [2022-11-26 00:46:07,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:46:07,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246640677] [2022-11-26 00:46:07,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:46:07,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:46:07,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:46:07,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:46:07,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:46:07,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246640677] [2022-11-26 00:46:07,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246640677] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:46:07,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835606945] [2022-11-26 00:46:07,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:46:07,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:46:07,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:46:07,567 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:46:07,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63525bf4-ad35-4bec-be62-653f0d7ed803/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 00:46:07,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:46:07,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-26 00:46:07,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:46:07,811 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:46:07,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-26 00:46:07,982 INFO L321 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-11-26 00:46:07,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 33 [2022-11-26 00:46:08,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:46:08,165 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 00:46:08,165 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 27 treesize of output 28 [2022-11-26 00:46:08,262 INFO L321 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-11-26 00:46:08,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 30 [2022-11-26 00:46:08,281 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 00:46:08,281 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 30 treesize of output 28 [2022-11-26 00:46:08,360 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 00:46:08,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2022-11-26 00:46:08,385 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 00:46:08,385 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 27 treesize of output 28 [2022-11-26 00:46:08,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:08,589 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:46:08,589 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 24 treesize of output 15 [2022-11-26 00:46:08,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:46:08,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:46:09,136 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:46:09,137 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 59 treesize of output 43 [2022-11-26 00:46:09,151 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:46:09,151 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 273 treesize of output 244 [2022-11-26 00:46:09,169 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:46:09,170 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 229 treesize of output 219 [2022-11-26 00:46:09,178 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 188 treesize of output 180 [2022-11-26 00:46:10,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:46:10,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835606945] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:46:10,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [970139944] [2022-11-26 00:46:10,188 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2022-11-26 00:46:10,189 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:46:10,191 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:46:10,191 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:46:10,192 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:46:10,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,224 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 [2022-11-26 00:46:10,237 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 [2022-11-26 00:46:10,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,245 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 [2022-11-26 00:46:10,253 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 [2022-11-26 00:46:10,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,277 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 [2022-11-26 00:46:10,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,286 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 [2022-11-26 00:46:10,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,295 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 [2022-11-26 00:46:10,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,325 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 [2022-11-26 00:46:10,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,348 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 [2022-11-26 00:46:10,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,359 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 [2022-11-26 00:46:10,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,374 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 43 treesize of output 33 [2022-11-26 00:46:10,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,385 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 30 treesize of output 32 [2022-11-26 00:46:10,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,397 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 30 treesize of output 32 [2022-11-26 00:46:10,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,434 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 [2022-11-26 00:46:10,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,477 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 [2022-11-26 00:46:10,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,491 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 37 treesize of output 35 [2022-11-26 00:46:10,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,506 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 37 treesize of output 35 [2022-11-26 00:46:10,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:10,555 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-26 00:46:10,555 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 4 new quantified variables, introduced 1 case distinctions, treesize of input 181 treesize of output 137 [2022-11-26 00:46:10,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,571 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 106 [2022-11-26 00:46:10,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,586 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 63 treesize of output 33 [2022-11-26 00:46:10,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,641 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-26 00:46:10,642 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 [2022-11-26 00:46:10,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:10,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:10,679 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:46:10,679 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 5 new quantified variables, introduced 4 case distinctions, treesize of input 144 treesize of output 119 [2022-11-26 00:46:10,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,709 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-26 00:46:10,709 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 5 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 88 [2022-11-26 00:46:10,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:10,784 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-26 00:46:10,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 147 treesize of output 110 [2022-11-26 00:46:10,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 61 [2022-11-26 00:46:10,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,832 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 47 treesize of output 52 [2022-11-26 00:46:10,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:10,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:10,883 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-11-26 00:46:10,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 141 treesize of output 119 [2022-11-26 00:46:10,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 66 [2022-11-26 00:46:10,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,931 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 62 treesize of output 55 [2022-11-26 00:46:10,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:10,993 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 [2022-11-26 00:46:11,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:11,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:11,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:11,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:11,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:11,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 69 [2022-11-26 00:46:11,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:11,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:11,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:11,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:11,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:11,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 69 [2022-11-26 00:46:11,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:11,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:11,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:11,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:11,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:11,088 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 [2022-11-26 00:46:11,127 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 [2022-11-26 00:46:11,133 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 [2022-11-26 00:46:11,139 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 [2022-11-26 00:46:11,207 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 15 treesize of output 1 [2022-11-26 00:46:11,490 INFO L321 Elim1Store]: treesize reduction 96, result has 68.5 percent of original size [2022-11-26 00:46:11,490 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 [2022-11-26 00:46:11,770 INFO L321 Elim1Store]: treesize reduction 72, result has 67.4 percent of original size [2022-11-26 00:46:11,770 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 [2022-11-26 00:49:45,105 WARN L233 SmtUtils]: Spent 6.91s on a formula simplification that was a NOOP. DAG size: 2493 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-26 00:49:53,950 WARN L233 SmtUtils]: Spent 6.42s on a formula simplification. DAG size of input: 1457 DAG size of output: 1456 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-26 00:50:08,242 WARN L233 SmtUtils]: Spent 10.53s on a formula simplification. DAG size of input: 1357 DAG size of output: 1352 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-26 00:56:24,722 WARN L233 SmtUtils]: Spent 5.19s on a formula simplification that was a NOOP. DAG size: 3509 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)