./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/test-0217_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/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_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/test-0217_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/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_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/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 e4aac8fd1b71e0bd84f9ab8e5c238dc6bf3a295fcb9cebe504ba6d0c9a6a7b7a --- 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 00:15:12,140 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:15:12,142 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:15:12,165 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:15:12,170 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:15:12,172 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:15:12,173 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:15:12,174 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:15:12,181 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:15:12,184 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:15:12,186 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:15:12,189 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:15:12,190 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:15:12,191 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:15:12,192 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:15:12,193 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:15:12,194 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:15:12,195 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:15:12,196 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:15:12,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:15:12,200 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:15:12,201 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:15:12,202 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:15:12,203 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:15:12,206 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:15:12,207 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:15:12,207 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:15:12,208 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:15:12,208 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:15:12,209 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:15:12,210 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:15:12,210 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:15:12,211 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:15:12,212 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:15:12,213 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:15:12,213 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:15:12,214 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:15:12,214 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:15:12,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:15:12,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:15:12,216 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:15:12,217 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-26 00:15:12,242 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:15:12,242 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:15:12,242 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:15:12,243 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:15:12,243 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:15:12,244 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:15:12,244 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:15:12,244 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:15:12,244 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:15:12,245 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:15:12,245 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:15:12,245 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:15:12,245 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:15:12,246 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:15:12,246 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:15:12,246 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:15:12,247 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:15:12,247 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:15:12,248 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-26 00:15:12,248 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-26 00:15:12,248 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:15:12,248 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:15:12,249 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 00:15:12,249 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:15:12,249 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:15:12,249 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:15:12,250 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-26 00:15:12,250 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-26 00:15:12,250 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-26 00:15:12,251 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:15:12,251 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-26 00:15:12,251 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:15:12,251 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:15:12,252 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:15:12,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:15:12,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:15:12,253 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:15:12,253 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:15:12,253 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:15:12,254 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:15:12,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:15:12,254 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:15:12,254 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_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4aac8fd1b71e0bd84f9ab8e5c238dc6bf3a295fcb9cebe504ba6d0c9a6a7b7a [2022-11-26 00:15:12,562 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:15:12,601 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:15:12,605 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:15:12,606 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:15:12,607 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:15:12,608 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/list-ext-properties/test-0217_1.i [2022-11-26 00:15:16,021 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:15:16,318 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:15:16,319 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/sv-benchmarks/c/list-ext-properties/test-0217_1.i [2022-11-26 00:15:16,343 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/data/910ff960e/50de672e0a134f7e98d9d49ed13758ee/FLAGfa1f8171e [2022-11-26 00:15:16,360 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/data/910ff960e/50de672e0a134f7e98d9d49ed13758ee [2022-11-26 00:15:16,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:15:16,365 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:15:16,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:15:16,367 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:15:16,371 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:15:16,372 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:15:16" (1/1) ... [2022-11-26 00:15:16,373 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ca84363 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:15:16, skipping insertion in model container [2022-11-26 00:15:16,374 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:15:16" (1/1) ... [2022-11-26 00:15:16,388 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:15:16,458 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:15:16,826 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:15:16,839 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:15:16,899 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:15:16,945 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:15:16,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:15:16 WrapperNode [2022-11-26 00:15:16,946 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:15:16,948 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:15:16,948 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:15:16,948 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:15:16,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:15:16" (1/1) ... [2022-11-26 00:15:16,976 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:15:16" (1/1) ... [2022-11-26 00:15:17,010 INFO L138 Inliner]: procedures = 181, calls = 47, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 249 [2022-11-26 00:15:17,011 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:15:17,012 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:15:17,012 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:15:17,012 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:15:17,023 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:15:16" (1/1) ... [2022-11-26 00:15:17,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:15:16" (1/1) ... [2022-11-26 00:15:17,028 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:15:16" (1/1) ... [2022-11-26 00:15:17,029 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:15:16" (1/1) ... [2022-11-26 00:15:17,040 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:15:16" (1/1) ... [2022-11-26 00:15:17,055 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:15:16" (1/1) ... [2022-11-26 00:15:17,057 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:15:16" (1/1) ... [2022-11-26 00:15:17,060 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:15:16" (1/1) ... [2022-11-26 00:15:17,067 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:15:17,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:15:17,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:15:17,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:15:17,075 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:15:16" (1/1) ... [2022-11-26 00:15:17,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:15:17,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:15:17,115 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:15:17,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:15:17,160 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2022-11-26 00:15:17,161 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2022-11-26 00:15:17,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 00:15:17,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-26 00:15:17,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:15:17,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-26 00:15:17,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-26 00:15:17,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:15:17,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-26 00:15:17,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:15:17,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:15:17,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:15:17,312 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:15:17,315 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:15:18,010 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:15:18,152 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:15:18,153 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-26 00:15:18,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:15:18 BoogieIcfgContainer [2022-11-26 00:15:18,157 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:15:18,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:15:18,163 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:15:18,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:15:18,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:15:16" (1/3) ... [2022-11-26 00:15:18,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4260ea2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:15:18, skipping insertion in model container [2022-11-26 00:15:18,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:15:16" (2/3) ... [2022-11-26 00:15:18,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4260ea2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:15:18, skipping insertion in model container [2022-11-26 00:15:18,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:15:18" (3/3) ... [2022-11-26 00:15:18,174 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0217_1.i [2022-11-26 00:15:18,195 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:15:18,196 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 67 error locations. [2022-11-26 00:15:18,263 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:15:18,270 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;@7381eee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:15:18,271 INFO L358 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2022-11-26 00:15:18,276 INFO L276 IsEmpty]: Start isEmpty. Operand has 138 states, 67 states have (on average 2.2686567164179103) internal successors, (152), 134 states have internal predecessors, (152), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:15:18,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-26 00:15:18,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:18,283 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-26 00:15:18,284 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:15:18,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:18,290 INFO L85 PathProgramCache]: Analyzing trace with hash 10973079, now seen corresponding path program 1 times [2022-11-26 00:15:18,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:18,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385908517] [2022-11-26 00:15:18,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:18,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:18,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:18,467 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 00:15:18,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:18,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385908517] [2022-11-26 00:15:18,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385908517] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:15:18,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:15:18,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:15:18,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912444583] [2022-11-26 00:15:18,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:15:18,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-26 00:15:18,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:18,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-26 00:15:18,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:15:18,535 INFO L87 Difference]: Start difference. First operand has 138 states, 67 states have (on average 2.2686567164179103) internal successors, (152), 134 states have internal predecessors, (152), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:18,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:18,652 INFO L93 Difference]: Finished difference Result 138 states and 152 transitions. [2022-11-26 00:15:18,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-26 00:15:18,655 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-26 00:15:18,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:18,666 INFO L225 Difference]: With dead ends: 138 [2022-11-26 00:15:18,666 INFO L226 Difference]: Without dead ends: 137 [2022-11-26 00:15:18,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:15:18,671 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:18,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 126 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:15:18,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-26 00:15:18,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-11-26 00:15:18,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 67 states have (on average 2.1940298507462686) internal successors, (147), 133 states have internal predecessors, (147), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:15:18,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 151 transitions. [2022-11-26 00:15:18,745 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 151 transitions. Word has length 4 [2022-11-26 00:15:18,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:18,746 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 151 transitions. [2022-11-26 00:15:18,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:18,746 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 151 transitions. [2022-11-26 00:15:18,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-26 00:15:18,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:18,747 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-26 00:15:18,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:15:18,747 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:15:18,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:18,748 INFO L85 PathProgramCache]: Analyzing trace with hash 341942440, now seen corresponding path program 1 times [2022-11-26 00:15:18,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:18,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923853656] [2022-11-26 00:15:18,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:18,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:18,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:18,946 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 00:15:18,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:18,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923853656] [2022-11-26 00:15:18,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923853656] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:15:18,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:15:18,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:15:18,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575406243] [2022-11-26 00:15:18,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:15:18,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:15:18,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:18,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:15:18,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:15:18,952 INFO L87 Difference]: Start difference. First operand 137 states and 151 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 00:15:19,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:19,314 INFO L93 Difference]: Finished difference Result 267 states and 294 transitions. [2022-11-26 00:15:19,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:15:19,315 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-11-26 00:15:19,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:19,322 INFO L225 Difference]: With dead ends: 267 [2022-11-26 00:15:19,323 INFO L226 Difference]: Without dead ends: 267 [2022-11-26 00:15:19,330 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 00:15:19,331 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 135 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:19,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 154 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:15:19,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-11-26 00:15:19,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 180. [2022-11-26 00:15:19,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 107 states have (on average 2.177570093457944) internal successors, (233), 173 states have internal predecessors, (233), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:15:19,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 241 transitions. [2022-11-26 00:15:19,360 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 241 transitions. Word has length 5 [2022-11-26 00:15:19,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:19,361 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 241 transitions. [2022-11-26 00:15:19,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 00:15:19,361 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 241 transitions. [2022-11-26 00:15:19,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-26 00:15:19,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:19,362 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-26 00:15:19,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:15:19,362 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:15:19,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:19,363 INFO L85 PathProgramCache]: Analyzing trace with hash 341942441, now seen corresponding path program 1 times [2022-11-26 00:15:19,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:19,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606098354] [2022-11-26 00:15:19,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:19,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:19,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:19,680 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 00:15:19,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:19,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606098354] [2022-11-26 00:15:19,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606098354] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:15:19,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:15:19,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:15:19,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646084803] [2022-11-26 00:15:19,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:15:19,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:15:19,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:19,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:15:19,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:15:19,685 INFO L87 Difference]: Start difference. First operand 180 states and 241 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 00:15:19,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:19,973 INFO L93 Difference]: Finished difference Result 284 states and 363 transitions. [2022-11-26 00:15:19,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:15:19,974 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-11-26 00:15:19,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:19,976 INFO L225 Difference]: With dead ends: 284 [2022-11-26 00:15:19,976 INFO L226 Difference]: Without dead ends: 284 [2022-11-26 00:15:19,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 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 00:15:19,977 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 102 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:19,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 274 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:15:19,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-11-26 00:15:19,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 240. [2022-11-26 00:15:19,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 161 states have (on average 2.0683229813664594) internal successors, (333), 229 states have internal predecessors, (333), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-26 00:15:19,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 349 transitions. [2022-11-26 00:15:19,990 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 349 transitions. Word has length 5 [2022-11-26 00:15:19,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:19,991 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 349 transitions. [2022-11-26 00:15:19,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 00:15:19,992 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 349 transitions. [2022-11-26 00:15:19,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:15:19,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:19,992 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:15:19,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:15:19,993 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:15:19,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:19,994 INFO L85 PathProgramCache]: Analyzing trace with hash -2105748153, now seen corresponding path program 1 times [2022-11-26 00:15:19,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:19,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404813247] [2022-11-26 00:15:19,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:19,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:20,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:20,035 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 00:15:20,036 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:20,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404813247] [2022-11-26 00:15:20,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404813247] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:15:20,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:15:20,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:15:20,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445712086] [2022-11-26 00:15:20,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:15:20,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:15:20,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:20,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:15:20,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:15:20,040 INFO L87 Difference]: Start difference. First operand 240 states and 349 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:20,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:20,216 INFO L93 Difference]: Finished difference Result 296 states and 402 transitions. [2022-11-26 00:15:20,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:15:20,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-26 00:15:20,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:20,222 INFO L225 Difference]: With dead ends: 296 [2022-11-26 00:15:20,222 INFO L226 Difference]: Without dead ends: 295 [2022-11-26 00:15:20,222 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 00:15:20,226 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 68 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:20,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 179 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:15:20,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-11-26 00:15:20,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 241. [2022-11-26 00:15:20,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 162 states have (on average 2.0617283950617282) internal successors, (334), 230 states have internal predecessors, (334), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-26 00:15:20,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 350 transitions. [2022-11-26 00:15:20,248 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 350 transitions. Word has length 7 [2022-11-26 00:15:20,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:20,249 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 350 transitions. [2022-11-26 00:15:20,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:20,250 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 350 transitions. [2022-11-26 00:15:20,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:15:20,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:20,251 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:15:20,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:15:20,251 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:15:20,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:20,252 INFO L85 PathProgramCache]: Analyzing trace with hash -2105749903, now seen corresponding path program 1 times [2022-11-26 00:15:20,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:20,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294563942] [2022-11-26 00:15:20,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:20,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:20,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:20,325 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 00:15:20,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:20,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294563942] [2022-11-26 00:15:20,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294563942] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:15:20,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:15:20,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:15:20,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274074841] [2022-11-26 00:15:20,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:15:20,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:15:20,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:20,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:15:20,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:15:20,333 INFO L87 Difference]: Start difference. First operand 241 states and 350 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:20,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:20,448 INFO L93 Difference]: Finished difference Result 350 states and 469 transitions. [2022-11-26 00:15:20,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:15:20,453 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-26 00:15:20,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:20,455 INFO L225 Difference]: With dead ends: 350 [2022-11-26 00:15:20,456 INFO L226 Difference]: Without dead ends: 347 [2022-11-26 00:15:20,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:15:20,459 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 128 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:20,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 251 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:15:20,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-11-26 00:15:20,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 239. [2022-11-26 00:15:20,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 160 states have (on average 2.06875) internal successors, (331), 228 states have internal predecessors, (331), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-26 00:15:20,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 347 transitions. [2022-11-26 00:15:20,500 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 347 transitions. Word has length 7 [2022-11-26 00:15:20,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:20,501 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 347 transitions. [2022-11-26 00:15:20,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:20,502 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 347 transitions. [2022-11-26 00:15:20,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-26 00:15:20,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:20,503 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:15:20,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-26 00:15:20,504 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:15:20,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:20,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1895671887, now seen corresponding path program 1 times [2022-11-26 00:15:20,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:20,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954463624] [2022-11-26 00:15:20,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:20,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:20,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:20,663 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 00:15:20,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:20,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954463624] [2022-11-26 00:15:20,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954463624] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:15:20,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:15:20,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:15:20,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064430156] [2022-11-26 00:15:20,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:15:20,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:15:20,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:20,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:15:20,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:15:20,667 INFO L87 Difference]: Start difference. First operand 239 states and 347 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:21,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:21,115 INFO L93 Difference]: Finished difference Result 442 states and 521 transitions. [2022-11-26 00:15:21,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:15:21,116 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-11-26 00:15:21,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:21,118 INFO L225 Difference]: With dead ends: 442 [2022-11-26 00:15:21,118 INFO L226 Difference]: Without dead ends: 442 [2022-11-26 00:15:21,118 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 00:15:21,119 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 385 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:21,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 267 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:15:21,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-11-26 00:15:21,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 236. [2022-11-26 00:15:21,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 161 states have (on average 2.018633540372671) internal successors, (325), 225 states have internal predecessors, (325), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-26 00:15:21,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 341 transitions. [2022-11-26 00:15:21,138 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 341 transitions. Word has length 10 [2022-11-26 00:15:21,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:21,138 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 341 transitions. [2022-11-26 00:15:21,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:21,139 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 341 transitions. [2022-11-26 00:15:21,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-26 00:15:21,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:21,140 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:15:21,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-26 00:15:21,140 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:15:21,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:21,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1895671886, now seen corresponding path program 1 times [2022-11-26 00:15:21,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:21,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396985564] [2022-11-26 00:15:21,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:21,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:21,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:21,394 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 00:15:21,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:21,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396985564] [2022-11-26 00:15:21,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396985564] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:15:21,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:15:21,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:15:21,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028220634] [2022-11-26 00:15:21,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:15:21,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:15:21,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:21,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:15:21,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:15:21,397 INFO L87 Difference]: Start difference. First operand 236 states and 341 transitions. Second operand has 6 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:22,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:22,520 INFO L93 Difference]: Finished difference Result 535 states and 656 transitions. [2022-11-26 00:15:22,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:15:22,521 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-11-26 00:15:22,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:22,523 INFO L225 Difference]: With dead ends: 535 [2022-11-26 00:15:22,524 INFO L226 Difference]: Without dead ends: 535 [2022-11-26 00:15:22,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:15:22,525 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 503 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:22,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [507 Valid, 351 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 00:15:22,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-11-26 00:15:22,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 250. [2022-11-26 00:15:22,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 175 states have (on average 2.0228571428571427) internal successors, (354), 239 states have internal predecessors, (354), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-26 00:15:22,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 370 transitions. [2022-11-26 00:15:22,542 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 370 transitions. Word has length 10 [2022-11-26 00:15:22,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:22,543 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 370 transitions. [2022-11-26 00:15:22,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:22,543 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 370 transitions. [2022-11-26 00:15:22,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-26 00:15:22,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:22,544 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:15:22,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-26 00:15:22,545 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:15:22,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:22,545 INFO L85 PathProgramCache]: Analyzing trace with hash -553924093, now seen corresponding path program 1 times [2022-11-26 00:15:22,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:22,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033879040] [2022-11-26 00:15:22,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:22,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:22,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:22,662 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 00:15:22,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:22,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033879040] [2022-11-26 00:15:22,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033879040] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:15:22,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:15:22,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:15:22,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950398309] [2022-11-26 00:15:22,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:15:22,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:15:22,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:22,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:15:22,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:15:22,665 INFO L87 Difference]: Start difference. First operand 250 states and 370 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:23,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:23,074 INFO L93 Difference]: Finished difference Result 446 states and 588 transitions. [2022-11-26 00:15:23,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:15:23,075 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-11-26 00:15:23,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:23,077 INFO L225 Difference]: With dead ends: 446 [2022-11-26 00:15:23,078 INFO L226 Difference]: Without dead ends: 446 [2022-11-26 00:15:23,078 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 00:15:23,079 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 250 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:23,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 264 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:15:23,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-11-26 00:15:23,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 256. [2022-11-26 00:15:23,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 181 states have (on average 1.988950276243094) internal successors, (360), 245 states have internal predecessors, (360), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-26 00:15:23,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 376 transitions. [2022-11-26 00:15:23,091 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 376 transitions. Word has length 12 [2022-11-26 00:15:23,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:23,092 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 376 transitions. [2022-11-26 00:15:23,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:23,092 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 376 transitions. [2022-11-26 00:15:23,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-26 00:15:23,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:23,093 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:15:23,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-26 00:15:23,094 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:15:23,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:23,095 INFO L85 PathProgramCache]: Analyzing trace with hash -553924092, now seen corresponding path program 1 times [2022-11-26 00:15:23,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:23,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172539208] [2022-11-26 00:15:23,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:23,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:23,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:23,280 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 00:15:23,280 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:23,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172539208] [2022-11-26 00:15:23,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172539208] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:15:23,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:15:23,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:15:23,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140019120] [2022-11-26 00:15:23,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:15:23,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:15:23,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:23,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:15:23,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:15:23,283 INFO L87 Difference]: Start difference. First operand 256 states and 376 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:23,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:23,554 INFO L93 Difference]: Finished difference Result 298 states and 388 transitions. [2022-11-26 00:15:23,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:15:23,556 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-11-26 00:15:23,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:23,558 INFO L225 Difference]: With dead ends: 298 [2022-11-26 00:15:23,558 INFO L226 Difference]: Without dead ends: 298 [2022-11-26 00:15:23,558 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 00:15:23,559 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 142 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:23,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 262 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:15:23,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-11-26 00:15:23,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 256. [2022-11-26 00:15:23,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 181 states have (on average 1.9558011049723756) internal successors, (354), 245 states have internal predecessors, (354), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-26 00:15:23,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 370 transitions. [2022-11-26 00:15:23,582 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 370 transitions. Word has length 12 [2022-11-26 00:15:23,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:23,583 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 370 transitions. [2022-11-26 00:15:23,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:23,583 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 370 transitions. [2022-11-26 00:15:23,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:15:23,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:23,584 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:15:23,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-26 00:15:23,584 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:15:23,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:23,585 INFO L85 PathProgramCache]: Analyzing trace with hash 571486522, now seen corresponding path program 1 times [2022-11-26 00:15:23,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:23,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81881619] [2022-11-26 00:15:23,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:23,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:23,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:23,879 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 00:15:23,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:23,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81881619] [2022-11-26 00:15:23,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81881619] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:15:23,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:15:23,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-26 00:15:23,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535991104] [2022-11-26 00:15:23,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:15:23,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:15:23,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:23,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:15:23,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:15:23,883 INFO L87 Difference]: Start difference. First operand 256 states and 370 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:24,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:24,232 INFO L93 Difference]: Finished difference Result 340 states and 463 transitions. [2022-11-26 00:15:24,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:15:24,235 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-11-26 00:15:24,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:24,237 INFO L225 Difference]: With dead ends: 340 [2022-11-26 00:15:24,237 INFO L226 Difference]: Without dead ends: 340 [2022-11-26 00:15:24,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:15:24,238 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 82 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:24,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 636 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:15:24,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-11-26 00:15:24,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 296. [2022-11-26 00:15:24,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 218 states have (on average 1.9036697247706422) internal successors, (415), 281 states have internal predecessors, (415), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:15:24,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 435 transitions. [2022-11-26 00:15:24,260 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 435 transitions. Word has length 13 [2022-11-26 00:15:24,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:24,261 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 435 transitions. [2022-11-26 00:15:24,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:24,261 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 435 transitions. [2022-11-26 00:15:24,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-26 00:15:24,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:24,262 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:15:24,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-26 00:15:24,262 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:15:24,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:24,263 INFO L85 PathProgramCache]: Analyzing trace with hash 536500504, now seen corresponding path program 1 times [2022-11-26 00:15:24,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:24,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654153495] [2022-11-26 00:15:24,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:24,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:24,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:24,342 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 00:15:24,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:24,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654153495] [2022-11-26 00:15:24,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654153495] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:15:24,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:15:24,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:15:24,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835624356] [2022-11-26 00:15:24,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:15:24,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:15:24,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:24,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:15:24,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:15:24,345 INFO L87 Difference]: Start difference. First operand 296 states and 435 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:24,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:24,531 INFO L93 Difference]: Finished difference Result 370 states and 511 transitions. [2022-11-26 00:15:24,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:15:24,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-11-26 00:15:24,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:24,534 INFO L225 Difference]: With dead ends: 370 [2022-11-26 00:15:24,534 INFO L226 Difference]: Without dead ends: 370 [2022-11-26 00:15:24,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:15:24,535 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 123 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:24,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 180 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:15:24,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-11-26 00:15:24,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 293. [2022-11-26 00:15:24,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 218 states have (on average 1.8623853211009174) internal successors, (406), 278 states have internal predecessors, (406), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:15:24,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 426 transitions. [2022-11-26 00:15:24,548 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 426 transitions. Word has length 14 [2022-11-26 00:15:24,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:24,548 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 426 transitions. [2022-11-26 00:15:24,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:24,548 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 426 transitions. [2022-11-26 00:15:24,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-26 00:15:24,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:24,549 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:15:24,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-26 00:15:24,550 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:15:24,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:24,550 INFO L85 PathProgramCache]: Analyzing trace with hash 536500505, now seen corresponding path program 1 times [2022-11-26 00:15:24,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:24,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600135217] [2022-11-26 00:15:24,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:24,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:24,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:24,834 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 00:15:24,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:24,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600135217] [2022-11-26 00:15:24,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600135217] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:15:24,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:15:24,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:15:24,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41382774] [2022-11-26 00:15:24,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:15:24,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:15:24,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:24,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:15:24,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:15:24,837 INFO L87 Difference]: Start difference. First operand 293 states and 426 transitions. Second operand has 7 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:25,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:25,183 INFO L93 Difference]: Finished difference Result 324 states and 425 transitions. [2022-11-26 00:15:25,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:15:25,184 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-11-26 00:15:25,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:25,186 INFO L225 Difference]: With dead ends: 324 [2022-11-26 00:15:25,186 INFO L226 Difference]: Without dead ends: 324 [2022-11-26 00:15:25,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:15:25,187 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 457 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:25,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 414 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:15:25,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-11-26 00:15:25,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 291. [2022-11-26 00:15:25,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 218 states have (on average 1.834862385321101) internal successors, (400), 276 states have internal predecessors, (400), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:15:25,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 420 transitions. [2022-11-26 00:15:25,204 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 420 transitions. Word has length 14 [2022-11-26 00:15:25,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:25,204 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 420 transitions. [2022-11-26 00:15:25,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:25,205 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 420 transitions. [2022-11-26 00:15:25,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-26 00:15:25,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:25,207 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:15:25,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-26 00:15:25,207 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:15:25,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:25,208 INFO L85 PathProgramCache]: Analyzing trace with hash 280474764, now seen corresponding path program 1 times [2022-11-26 00:15:25,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:25,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153626508] [2022-11-26 00:15:25,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:25,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:25,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:25,722 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 00:15:25,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:25,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153626508] [2022-11-26 00:15:25,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153626508] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:15:25,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:15:25,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-26 00:15:25,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571439379] [2022-11-26 00:15:25,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:15:25,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:15:25,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:25,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:15:25,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:15:25,725 INFO L87 Difference]: Start difference. First operand 291 states and 420 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:26,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:26,288 INFO L93 Difference]: Finished difference Result 541 states and 742 transitions. [2022-11-26 00:15:26,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:15:26,289 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-11-26 00:15:26,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:26,291 INFO L225 Difference]: With dead ends: 541 [2022-11-26 00:15:26,291 INFO L226 Difference]: Without dead ends: 539 [2022-11-26 00:15:26,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:15:26,292 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 304 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:26,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 747 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:15:26,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-11-26 00:15:26,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 285. [2022-11-26 00:15:26,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 212 states have (on average 1.8349056603773586) internal successors, (389), 270 states have internal predecessors, (389), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:15:26,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 409 transitions. [2022-11-26 00:15:26,304 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 409 transitions. Word has length 16 [2022-11-26 00:15:26,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:26,304 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 409 transitions. [2022-11-26 00:15:26,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:26,305 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 409 transitions. [2022-11-26 00:15:26,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-26 00:15:26,305 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:26,306 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:15:26,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-26 00:15:26,306 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:15:26,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:26,307 INFO L85 PathProgramCache]: Analyzing trace with hash 180911547, now seen corresponding path program 1 times [2022-11-26 00:15:26,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:26,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361751834] [2022-11-26 00:15:26,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:26,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:26,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:26,683 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 00:15:26,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:26,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361751834] [2022-11-26 00:15:26,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361751834] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:15:26,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:15:26,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:15:26,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143349203] [2022-11-26 00:15:26,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:15:26,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:15:26,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:26,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:15:26,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:15:26,686 INFO L87 Difference]: Start difference. First operand 285 states and 409 transitions. Second operand has 7 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:27,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:27,044 INFO L93 Difference]: Finished difference Result 317 states and 411 transitions. [2022-11-26 00:15:27,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:15:27,044 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-11-26 00:15:27,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:27,046 INFO L225 Difference]: With dead ends: 317 [2022-11-26 00:15:27,046 INFO L226 Difference]: Without dead ends: 317 [2022-11-26 00:15:27,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:15:27,047 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 321 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:27,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 461 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:15:27,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-11-26 00:15:27,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 284. [2022-11-26 00:15:27,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 212 states have (on average 1.820754716981132) internal successors, (386), 269 states have internal predecessors, (386), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:15:27,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 406 transitions. [2022-11-26 00:15:27,058 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 406 transitions. Word has length 16 [2022-11-26 00:15:27,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:27,058 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 406 transitions. [2022-11-26 00:15:27,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:27,059 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 406 transitions. [2022-11-26 00:15:27,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-26 00:15:27,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:27,059 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:15:27,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-26 00:15:27,060 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:15:27,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:27,061 INFO L85 PathProgramCache]: Analyzing trace with hash 180911354, now seen corresponding path program 1 times [2022-11-26 00:15:27,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:27,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627702498] [2022-11-26 00:15:27,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:27,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:27,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:27,178 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 00:15:27,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:27,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627702498] [2022-11-26 00:15:27,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627702498] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:15:27,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:15:27,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:15:27,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221330705] [2022-11-26 00:15:27,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:15:27,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:15:27,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:27,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:15:27,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:15:27,181 INFO L87 Difference]: Start difference. First operand 284 states and 406 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:27,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:27,375 INFO L93 Difference]: Finished difference Result 436 states and 593 transitions. [2022-11-26 00:15:27,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:15:27,376 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-11-26 00:15:27,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:27,379 INFO L225 Difference]: With dead ends: 436 [2022-11-26 00:15:27,379 INFO L226 Difference]: Without dead ends: 436 [2022-11-26 00:15:27,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:15:27,380 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 121 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:27,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 425 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:15:27,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-11-26 00:15:27,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 302. [2022-11-26 00:15:27,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 230 states have (on average 1.7652173913043478) internal successors, (406), 287 states have internal predecessors, (406), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:15:27,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 426 transitions. [2022-11-26 00:15:27,391 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 426 transitions. Word has length 16 [2022-11-26 00:15:27,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:27,391 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 426 transitions. [2022-11-26 00:15:27,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:27,392 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 426 transitions. [2022-11-26 00:15:27,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-26 00:15:27,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:27,392 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:15:27,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-26 00:15:27,393 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:15:27,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:27,393 INFO L85 PathProgramCache]: Analyzing trace with hash 105155647, now seen corresponding path program 1 times [2022-11-26 00:15:27,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:27,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264256085] [2022-11-26 00:15:27,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:27,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:27,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:27,457 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 00:15:27,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:27,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264256085] [2022-11-26 00:15:27,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264256085] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:15:27,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:15:27,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:15:27,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620697833] [2022-11-26 00:15:27,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:15:27,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:15:27,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:27,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:15:27,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:15:27,459 INFO L87 Difference]: Start difference. First operand 302 states and 426 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:27,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:27,841 INFO L93 Difference]: Finished difference Result 492 states and 634 transitions. [2022-11-26 00:15:27,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:15:27,841 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-11-26 00:15:27,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:27,844 INFO L225 Difference]: With dead ends: 492 [2022-11-26 00:15:27,845 INFO L226 Difference]: Without dead ends: 492 [2022-11-26 00:15:27,845 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 00:15:27,846 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 223 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:27,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 260 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:15:27,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-11-26 00:15:27,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 318. [2022-11-26 00:15:27,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 246 states have (on average 1.7967479674796747) internal successors, (442), 303 states have internal predecessors, (442), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:15:27,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 462 transitions. [2022-11-26 00:15:27,859 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 462 transitions. Word has length 17 [2022-11-26 00:15:27,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:27,859 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 462 transitions. [2022-11-26 00:15:27,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:27,860 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 462 transitions. [2022-11-26 00:15:27,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-26 00:15:27,860 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:27,861 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:15:27,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-26 00:15:27,861 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:15:27,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:27,862 INFO L85 PathProgramCache]: Analyzing trace with hash 105155648, now seen corresponding path program 1 times [2022-11-26 00:15:27,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:27,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972748358] [2022-11-26 00:15:27,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:27,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:27,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:28,037 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 00:15:28,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:28,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972748358] [2022-11-26 00:15:28,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972748358] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:15:28,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:15:28,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:15:28,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091139708] [2022-11-26 00:15:28,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:15:28,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:15:28,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:28,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:15:28,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:15:28,043 INFO L87 Difference]: Start difference. First operand 318 states and 462 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:28,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:28,396 INFO L93 Difference]: Finished difference Result 356 states and 470 transitions. [2022-11-26 00:15:28,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:15:28,397 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-11-26 00:15:28,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:28,398 INFO L225 Difference]: With dead ends: 356 [2022-11-26 00:15:28,398 INFO L226 Difference]: Without dead ends: 356 [2022-11-26 00:15:28,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:15:28,399 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 135 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:28,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 323 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:15:28,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-11-26 00:15:28,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 318. [2022-11-26 00:15:28,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 246 states have (on average 1.7601626016260163) internal successors, (433), 303 states have internal predecessors, (433), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:15:28,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 453 transitions. [2022-11-26 00:15:28,410 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 453 transitions. Word has length 17 [2022-11-26 00:15:28,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:28,411 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 453 transitions. [2022-11-26 00:15:28,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:28,412 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 453 transitions. [2022-11-26 00:15:28,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-26 00:15:28,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:28,413 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 00:15:28,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-26 00:15:28,413 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:15:28,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:28,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1660906589, now seen corresponding path program 1 times [2022-11-26 00:15:28,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:28,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424699756] [2022-11-26 00:15:28,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:28,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:28,661 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 00:15:28,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:28,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424699756] [2022-11-26 00:15:28,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424699756] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:15:28,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:15:28,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-26 00:15:28,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095046925] [2022-11-26 00:15:28,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:15:28,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:15:28,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:28,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:15:28,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:15:28,664 INFO L87 Difference]: Start difference. First operand 318 states and 453 transitions. Second operand has 8 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:29,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:29,210 INFO L93 Difference]: Finished difference Result 479 states and 649 transitions. [2022-11-26 00:15:29,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:15:29,211 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-11-26 00:15:29,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:29,213 INFO L225 Difference]: With dead ends: 479 [2022-11-26 00:15:29,213 INFO L226 Difference]: Without dead ends: 479 [2022-11-26 00:15:29,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:15:29,214 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 385 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:29,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 731 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:15:29,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-11-26 00:15:29,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 315. [2022-11-26 00:15:29,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 246 states have (on average 1.7195121951219512) internal successors, (423), 300 states have internal predecessors, (423), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:15:29,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 443 transitions. [2022-11-26 00:15:29,231 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 443 transitions. Word has length 20 [2022-11-26 00:15:29,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:29,234 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 443 transitions. [2022-11-26 00:15:29,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:29,234 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 443 transitions. [2022-11-26 00:15:29,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-26 00:15:29,235 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:29,235 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 00:15:29,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-26 00:15:29,236 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:15:29,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:29,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1591482284, now seen corresponding path program 1 times [2022-11-26 00:15:29,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:29,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586431627] [2022-11-26 00:15:29,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:29,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:29,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:29,358 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 00:15:29,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:29,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586431627] [2022-11-26 00:15:29,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586431627] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:15:29,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:15:29,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:15:29,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675495256] [2022-11-26 00:15:29,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:15:29,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:15:29,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:29,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:15:29,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:15:29,363 INFO L87 Difference]: Start difference. First operand 315 states and 443 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:29,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:29,636 INFO L93 Difference]: Finished difference Result 388 states and 523 transitions. [2022-11-26 00:15:29,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:15:29,637 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-11-26 00:15:29,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:29,639 INFO L225 Difference]: With dead ends: 388 [2022-11-26 00:15:29,639 INFO L226 Difference]: Without dead ends: 388 [2022-11-26 00:15:29,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:15:29,640 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 301 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:29,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 286 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:15:29,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-11-26 00:15:29,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 314. [2022-11-26 00:15:29,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 246 states have (on average 1.7113821138211383) internal successors, (421), 299 states have internal predecessors, (421), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:15:29,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 441 transitions. [2022-11-26 00:15:29,655 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 441 transitions. Word has length 20 [2022-11-26 00:15:29,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:29,656 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 441 transitions. [2022-11-26 00:15:29,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:29,656 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 441 transitions. [2022-11-26 00:15:29,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-26 00:15:29,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:29,657 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 00:15:29,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-26 00:15:29,658 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:15:29,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:29,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1591482285, now seen corresponding path program 1 times [2022-11-26 00:15:29,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:29,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949451582] [2022-11-26 00:15:29,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:29,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:29,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:29,873 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 00:15:29,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:29,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949451582] [2022-11-26 00:15:29,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949451582] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:15:29,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:15:29,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:15:29,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577608538] [2022-11-26 00:15:29,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:15:29,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:15:29,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:29,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:15:29,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:15:29,876 INFO L87 Difference]: Start difference. First operand 314 states and 441 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:30,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:30,118 INFO L93 Difference]: Finished difference Result 338 states and 441 transitions. [2022-11-26 00:15:30,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:15:30,119 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-11-26 00:15:30,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:30,121 INFO L225 Difference]: With dead ends: 338 [2022-11-26 00:15:30,121 INFO L226 Difference]: Without dead ends: 338 [2022-11-26 00:15:30,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:15:30,122 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 324 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:30,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 302 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:15:30,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-11-26 00:15:30,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 313. [2022-11-26 00:15:30,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 246 states have (on average 1.7032520325203253) internal successors, (419), 298 states have internal predecessors, (419), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:15:30,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 439 transitions. [2022-11-26 00:15:30,134 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 439 transitions. Word has length 20 [2022-11-26 00:15:30,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:30,134 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 439 transitions. [2022-11-26 00:15:30,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:30,134 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 439 transitions. [2022-11-26 00:15:30,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-26 00:15:30,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:30,138 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 00:15:30,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-26 00:15:30,139 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:15:30,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:30,140 INFO L85 PathProgramCache]: Analyzing trace with hash -51500377, now seen corresponding path program 1 times [2022-11-26 00:15:30,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:30,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143543502] [2022-11-26 00:15:30,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:30,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:30,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:30,547 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 00:15:30,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:30,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143543502] [2022-11-26 00:15:30,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143543502] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:15:30,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:15:30,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:15:30,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186856278] [2022-11-26 00:15:30,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:15:30,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:15:30,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:30,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:15:30,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:15:30,550 INFO L87 Difference]: Start difference. First operand 313 states and 439 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:30,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:30,971 INFO L93 Difference]: Finished difference Result 350 states and 461 transitions. [2022-11-26 00:15:30,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:15:30,971 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-11-26 00:15:30,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:30,973 INFO L225 Difference]: With dead ends: 350 [2022-11-26 00:15:30,973 INFO L226 Difference]: Without dead ends: 350 [2022-11-26 00:15:30,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:15:30,974 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 97 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:30,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 500 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:15:30,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-11-26 00:15:30,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 309. [2022-11-26 00:15:30,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 242 states have (on average 1.6900826446280992) internal successors, (409), 294 states have internal predecessors, (409), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:15:30,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 429 transitions. [2022-11-26 00:15:30,984 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 429 transitions. Word has length 21 [2022-11-26 00:15:30,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:30,984 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 429 transitions. [2022-11-26 00:15:30,984 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:30,985 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 429 transitions. [2022-11-26 00:15:30,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-26 00:15:30,985 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:30,985 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 00:15:30,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-26 00:15:30,986 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:15:30,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:30,986 INFO L85 PathProgramCache]: Analyzing trace with hash -51525946, now seen corresponding path program 1 times [2022-11-26 00:15:30,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:30,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273278086] [2022-11-26 00:15:30,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:30,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:31,136 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 00:15:31,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:31,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273278086] [2022-11-26 00:15:31,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273278086] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:15:31,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:15:31,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:15:31,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477599701] [2022-11-26 00:15:31,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:15:31,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:15:31,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:31,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:15:31,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:15:31,138 INFO L87 Difference]: Start difference. First operand 309 states and 429 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:31,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:31,398 INFO L93 Difference]: Finished difference Result 349 states and 460 transitions. [2022-11-26 00:15:31,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:15:31,400 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-11-26 00:15:31,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:31,402 INFO L225 Difference]: With dead ends: 349 [2022-11-26 00:15:31,402 INFO L226 Difference]: Without dead ends: 349 [2022-11-26 00:15:31,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:15:31,403 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 97 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:31,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 407 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:15:31,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-11-26 00:15:31,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 309. [2022-11-26 00:15:31,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 242 states have (on average 1.6859504132231404) internal successors, (408), 294 states have internal predecessors, (408), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:15:31,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 428 transitions. [2022-11-26 00:15:31,413 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 428 transitions. Word has length 21 [2022-11-26 00:15:31,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:31,413 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 428 transitions. [2022-11-26 00:15:31,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:31,414 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 428 transitions. [2022-11-26 00:15:31,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-26 00:15:31,414 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:31,415 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 00:15:31,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-26 00:15:31,415 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:15:31,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:31,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1597304068, now seen corresponding path program 1 times [2022-11-26 00:15:31,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:31,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932657292] [2022-11-26 00:15:31,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:31,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:31,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:31,651 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 00:15:31,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:31,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932657292] [2022-11-26 00:15:31,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932657292] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:15:31,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:15:31,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:15:31,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320594900] [2022-11-26 00:15:31,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:15:31,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:15:31,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:31,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:15:31,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:15:31,654 INFO L87 Difference]: Start difference. First operand 309 states and 428 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:31,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:31,966 INFO L93 Difference]: Finished difference Result 404 states and 535 transitions. [2022-11-26 00:15:31,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:15:31,967 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-11-26 00:15:31,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:31,969 INFO L225 Difference]: With dead ends: 404 [2022-11-26 00:15:31,969 INFO L226 Difference]: Without dead ends: 404 [2022-11-26 00:15:31,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:15:31,970 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 138 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:31,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 381 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:15:31,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-11-26 00:15:31,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 340. [2022-11-26 00:15:31,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 270 states have (on average 1.6703703703703703) internal successors, (451), 323 states have internal predecessors, (451), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-26 00:15:31,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 475 transitions. [2022-11-26 00:15:31,982 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 475 transitions. Word has length 22 [2022-11-26 00:15:31,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:31,983 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 475 transitions. [2022-11-26 00:15:31,983 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:31,983 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 475 transitions. [2022-11-26 00:15:31,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-26 00:15:31,984 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:31,984 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 00:15:31,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-26 00:15:31,984 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:15:31,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:31,985 INFO L85 PathProgramCache]: Analyzing trace with hash 406121229, now seen corresponding path program 1 times [2022-11-26 00:15:31,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:31,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969625673] [2022-11-26 00:15:31,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:31,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:32,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:32,074 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 00:15:32,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:32,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969625673] [2022-11-26 00:15:32,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969625673] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:15:32,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:15:32,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:15:32,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427173613] [2022-11-26 00:15:32,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:15:32,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:15:32,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:32,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:15:32,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:15:32,077 INFO L87 Difference]: Start difference. First operand 340 states and 475 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:32,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:32,401 INFO L93 Difference]: Finished difference Result 645 states and 833 transitions. [2022-11-26 00:15:32,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:15:32,402 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-11-26 00:15:32,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:32,405 INFO L225 Difference]: With dead ends: 645 [2022-11-26 00:15:32,405 INFO L226 Difference]: Without dead ends: 645 [2022-11-26 00:15:32,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:15:32,406 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 492 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:32,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 325 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:15:32,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-11-26 00:15:32,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 337. [2022-11-26 00:15:32,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 270 states have (on average 1.6481481481481481) internal successors, (445), 320 states have internal predecessors, (445), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-26 00:15:32,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 469 transitions. [2022-11-26 00:15:32,418 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 469 transitions. Word has length 22 [2022-11-26 00:15:32,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:32,419 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 469 transitions. [2022-11-26 00:15:32,419 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:32,419 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 469 transitions. [2022-11-26 00:15:32,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-26 00:15:32,420 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:32,420 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 00:15:32,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-26 00:15:32,421 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:15:32,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:32,421 INFO L85 PathProgramCache]: Analyzing trace with hash 406121230, now seen corresponding path program 1 times [2022-11-26 00:15:32,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:32,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73391201] [2022-11-26 00:15:32,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:32,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:32,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:32,672 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 00:15:32,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:32,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73391201] [2022-11-26 00:15:32,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73391201] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:15:32,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:15:32,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:15:32,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935978738] [2022-11-26 00:15:32,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:15:32,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:15:32,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:32,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:15:32,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:15:32,675 INFO L87 Difference]: Start difference. First operand 337 states and 469 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:33,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:33,064 INFO L93 Difference]: Finished difference Result 520 states and 667 transitions. [2022-11-26 00:15:33,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:15:33,065 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-11-26 00:15:33,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:33,067 INFO L225 Difference]: With dead ends: 520 [2022-11-26 00:15:33,067 INFO L226 Difference]: Without dead ends: 520 [2022-11-26 00:15:33,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:15:33,068 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 596 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:33,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [596 Valid, 396 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:15:33,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-11-26 00:15:33,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 336. [2022-11-26 00:15:33,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 270 states have (on average 1.6407407407407408) internal successors, (443), 319 states have internal predecessors, (443), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-26 00:15:33,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 467 transitions. [2022-11-26 00:15:33,080 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 467 transitions. Word has length 22 [2022-11-26 00:15:33,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:33,080 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 467 transitions. [2022-11-26 00:15:33,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:33,081 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 467 transitions. [2022-11-26 00:15:33,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-26 00:15:33,081 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:33,082 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 00:15:33,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-26 00:15:33,082 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:15:33,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:33,083 INFO L85 PathProgramCache]: Analyzing trace with hash 406121391, now seen corresponding path program 1 times [2022-11-26 00:15:33,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:33,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233607788] [2022-11-26 00:15:33,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:33,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:33,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:33,326 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 00:15:33,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:33,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233607788] [2022-11-26 00:15:33,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233607788] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:15:33,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:15:33,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:15:33,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212460438] [2022-11-26 00:15:33,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:15:33,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:15:33,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:33,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:15:33,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:15:33,330 INFO L87 Difference]: Start difference. First operand 336 states and 467 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:33,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:33,754 INFO L93 Difference]: Finished difference Result 465 states and 580 transitions. [2022-11-26 00:15:33,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:15:33,755 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-11-26 00:15:33,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:33,756 INFO L225 Difference]: With dead ends: 465 [2022-11-26 00:15:33,757 INFO L226 Difference]: Without dead ends: 465 [2022-11-26 00:15:33,757 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 00:15:33,757 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 284 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:33,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 258 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:15:33,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-11-26 00:15:33,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 336. [2022-11-26 00:15:33,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 270 states have (on average 1.6333333333333333) internal successors, (441), 319 states have internal predecessors, (441), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-26 00:15:33,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 465 transitions. [2022-11-26 00:15:33,772 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 465 transitions. Word has length 22 [2022-11-26 00:15:33,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:33,772 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 465 transitions. [2022-11-26 00:15:33,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:33,773 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 465 transitions. [2022-11-26 00:15:33,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-26 00:15:33,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:33,773 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:15:33,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-26 00:15:33,774 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:15:33,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:33,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1705876354, now seen corresponding path program 1 times [2022-11-26 00:15:33,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:33,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641887676] [2022-11-26 00:15:33,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:33,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:33,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:34,040 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 00:15:34,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:34,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641887676] [2022-11-26 00:15:34,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641887676] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:15:34,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:15:34,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:15:34,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120751245] [2022-11-26 00:15:34,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:15:34,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:15:34,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:34,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:15:34,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:15:34,043 INFO L87 Difference]: Start difference. First operand 336 states and 465 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:34,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:34,820 INFO L93 Difference]: Finished difference Result 606 states and 804 transitions. [2022-11-26 00:15:34,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:15:34,821 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-11-26 00:15:34,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:34,824 INFO L225 Difference]: With dead ends: 606 [2022-11-26 00:15:34,825 INFO L226 Difference]: Without dead ends: 606 [2022-11-26 00:15:34,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:15:34,826 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 304 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:34,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 555 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:15:34,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-11-26 00:15:34,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 366. [2022-11-26 00:15:34,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 297 states have (on average 1.612794612794613) internal successors, (479), 347 states have internal predecessors, (479), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-26 00:15:34,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 507 transitions. [2022-11-26 00:15:34,846 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 507 transitions. Word has length 24 [2022-11-26 00:15:34,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:34,846 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 507 transitions. [2022-11-26 00:15:34,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:34,847 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 507 transitions. [2022-11-26 00:15:34,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-26 00:15:34,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:34,847 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 00:15:34,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-26 00:15:34,848 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:15:34,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:34,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1342559158, now seen corresponding path program 1 times [2022-11-26 00:15:34,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:34,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347569993] [2022-11-26 00:15:34,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:34,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:34,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:35,072 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 00:15:35,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:35,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347569993] [2022-11-26 00:15:35,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347569993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:15:35,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:15:35,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:15:35,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284398243] [2022-11-26 00:15:35,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:15:35,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:15:35,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:35,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:15:35,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:15:35,078 INFO L87 Difference]: Start difference. First operand 366 states and 507 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:35,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:35,469 INFO L93 Difference]: Finished difference Result 408 states and 527 transitions. [2022-11-26 00:15:35,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:15:35,472 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-11-26 00:15:35,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:35,474 INFO L225 Difference]: With dead ends: 408 [2022-11-26 00:15:35,474 INFO L226 Difference]: Without dead ends: 408 [2022-11-26 00:15:35,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:15:35,475 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 248 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:35,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 326 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:15:35,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-11-26 00:15:35,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 366. [2022-11-26 00:15:35,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 297 states have (on average 1.5993265993265993) internal successors, (475), 347 states have internal predecessors, (475), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-26 00:15:35,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 503 transitions. [2022-11-26 00:15:35,487 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 503 transitions. Word has length 25 [2022-11-26 00:15:35,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:35,487 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 503 transitions. [2022-11-26 00:15:35,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:35,488 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 503 transitions. [2022-11-26 00:15:35,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-26 00:15:35,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:35,489 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:15:35,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-26 00:15:35,489 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:15:35,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:35,490 INFO L85 PathProgramCache]: Analyzing trace with hash 944588247, now seen corresponding path program 1 times [2022-11-26 00:15:35,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:35,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919223290] [2022-11-26 00:15:35,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:35,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:35,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:35,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:15:35,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:35,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919223290] [2022-11-26 00:15:35,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919223290] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:15:35,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:15:35,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:15:35,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191952693] [2022-11-26 00:15:35,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:15:35,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:15:35,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:35,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:15:35,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:15:35,782 INFO L87 Difference]: Start difference. First operand 366 states and 503 transitions. Second operand has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:15:36,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:36,137 INFO L93 Difference]: Finished difference Result 438 states and 566 transitions. [2022-11-26 00:15:36,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:15:36,140 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2022-11-26 00:15:36,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:36,143 INFO L225 Difference]: With dead ends: 438 [2022-11-26 00:15:36,143 INFO L226 Difference]: Without dead ends: 438 [2022-11-26 00:15:36,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:15:36,144 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 307 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:36,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 233 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:15:36,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-11-26 00:15:36,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 363. [2022-11-26 00:15:36,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 297 states have (on average 1.5824915824915824) internal successors, (470), 344 states have internal predecessors, (470), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-26 00:15:36,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 498 transitions. [2022-11-26 00:15:36,157 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 498 transitions. Word has length 33 [2022-11-26 00:15:36,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:36,157 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 498 transitions. [2022-11-26 00:15:36,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:15:36,158 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 498 transitions. [2022-11-26 00:15:36,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-26 00:15:36,159 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:36,159 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:15:36,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-26 00:15:36,160 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:15:36,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:36,162 INFO L85 PathProgramCache]: Analyzing trace with hash -145547822, now seen corresponding path program 1 times [2022-11-26 00:15:36,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:36,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936611944] [2022-11-26 00:15:36,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:36,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:36,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:36,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:15:36,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:36,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936611944] [2022-11-26 00:15:36,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936611944] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:15:36,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520647157] [2022-11-26 00:15:36,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:36,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:15:36,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:15:36,347 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:15:36,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:15:36,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:36,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-26 00:15:36,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:15:36,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:15:36,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:15:36,893 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-26 00:15:36,894 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 12 treesize of output 11 [2022-11-26 00:15:36,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:15:36,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520647157] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:15:36,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1239715462] [2022-11-26 00:15:36,982 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-26 00:15:36,982 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:15:36,987 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:15:36,993 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:15:36,993 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:15:38,268 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 54 for LOIs [2022-11-26 00:15:38,272 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:15:41,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1239715462] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:15:41,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:15:41,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 5, 5] total 23 [2022-11-26 00:15:41,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714229959] [2022-11-26 00:15:41,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:15:41,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-26 00:15:41,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:41,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-26 00:15:41,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2022-11-26 00:15:41,347 INFO L87 Difference]: Start difference. First operand 363 states and 498 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:42,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:42,103 INFO L93 Difference]: Finished difference Result 390 states and 529 transitions. [2022-11-26 00:15:42,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 00:15:42,104 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-11-26 00:15:42,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:42,106 INFO L225 Difference]: With dead ends: 390 [2022-11-26 00:15:42,107 INFO L226 Difference]: Without dead ends: 390 [2022-11-26 00:15:42,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2022-11-26 00:15:42,108 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 38 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:42,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 193 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 00:15:42,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-11-26 00:15:42,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 376. [2022-11-26 00:15:42,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 309 states have (on average 1.5663430420711975) internal successors, (484), 356 states have internal predecessors, (484), 15 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-26 00:15:42,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 514 transitions. [2022-11-26 00:15:42,120 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 514 transitions. Word has length 34 [2022-11-26 00:15:42,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:42,120 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 514 transitions. [2022-11-26 00:15:42,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:42,121 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 514 transitions. [2022-11-26 00:15:42,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-26 00:15:42,122 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:42,122 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:15:42,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-26 00:15:42,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:15:42,329 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:15:42,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:42,331 INFO L85 PathProgramCache]: Analyzing trace with hash 846352201, now seen corresponding path program 1 times [2022-11-26 00:15:42,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:42,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135964874] [2022-11-26 00:15:42,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:42,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:42,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:42,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:15:42,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:42,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135964874] [2022-11-26 00:15:42,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135964874] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:15:42,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:15:42,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:15:42,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109470644] [2022-11-26 00:15:42,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:15:42,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:15:42,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:42,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:15:42,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:15:42,618 INFO L87 Difference]: Start difference. First operand 376 states and 514 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:42,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:42,917 INFO L93 Difference]: Finished difference Result 399 states and 514 transitions. [2022-11-26 00:15:42,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:15:42,918 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-11-26 00:15:42,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:42,920 INFO L225 Difference]: With dead ends: 399 [2022-11-26 00:15:42,920 INFO L226 Difference]: Without dead ends: 399 [2022-11-26 00:15:42,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:15:42,921 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 212 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:42,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 269 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:15:42,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-11-26 00:15:42,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 375. [2022-11-26 00:15:42,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 309 states have (on average 1.5598705501618122) internal successors, (482), 355 states have internal predecessors, (482), 15 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-26 00:15:42,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 512 transitions. [2022-11-26 00:15:42,931 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 512 transitions. Word has length 33 [2022-11-26 00:15:42,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:42,931 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 512 transitions. [2022-11-26 00:15:42,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:15:42,931 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 512 transitions. [2022-11-26 00:15:42,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-26 00:15:42,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:42,932 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:15:42,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-26 00:15:42,933 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:15:42,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:42,934 INFO L85 PathProgramCache]: Analyzing trace with hash -219271225, now seen corresponding path program 1 times [2022-11-26 00:15:42,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:42,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629025439] [2022-11-26 00:15:42,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:42,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:43,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:44,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:15:44,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:44,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629025439] [2022-11-26 00:15:44,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629025439] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:15:44,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966087668] [2022-11-26 00:15:44,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:44,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:15:44,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:15:44,276 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:15:44,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:15:44,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:44,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-26 00:15:44,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:15:44,630 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:15:44,632 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 00:15:44,768 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 15 treesize of output 11 [2022-11-26 00:15:44,780 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 15 treesize of output 11 [2022-11-26 00:15:44,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:44,840 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 25 treesize of output 24 [2022-11-26 00:15:44,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:44,856 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 25 treesize of output 24 [2022-11-26 00:15:44,935 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 18 treesize of output 20 [2022-11-26 00:15:44,943 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 18 treesize of output 20 [2022-11-26 00:15:45,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 19 treesize of output 7 [2022-11-26 00:15:45,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 19 treesize of output 7 [2022-11-26 00:15:45,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:15:45,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:15:45,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966087668] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:15:45,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:15:45,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 20 [2022-11-26 00:15:45,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754699868] [2022-11-26 00:15:45,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:15:45,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-26 00:15:45,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:45,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-26 00:15:45,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:15:45,055 INFO L87 Difference]: Start difference. First operand 375 states and 512 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:15:46,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:46,260 INFO L93 Difference]: Finished difference Result 581 states and 711 transitions. [2022-11-26 00:15:46,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 00:15:46,261 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2022-11-26 00:15:46,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:46,263 INFO L225 Difference]: With dead ends: 581 [2022-11-26 00:15:46,263 INFO L226 Difference]: Without dead ends: 581 [2022-11-26 00:15:46,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2022-11-26 00:15:46,264 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 418 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 1114 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:46,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 1114 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 00:15:46,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-11-26 00:15:46,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 378. [2022-11-26 00:15:46,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 312 states have (on average 1.5544871794871795) internal successors, (485), 358 states have internal predecessors, (485), 15 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-26 00:15:46,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 515 transitions. [2022-11-26 00:15:46,282 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 515 transitions. Word has length 34 [2022-11-26 00:15:46,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:46,283 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 515 transitions. [2022-11-26 00:15:46,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:15:46,284 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 515 transitions. [2022-11-26 00:15:46,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-26 00:15:46,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:46,285 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:15:46,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:15:46,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:15:46,492 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:15:46,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:46,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1144478554, now seen corresponding path program 1 times [2022-11-26 00:15:46,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:46,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445836946] [2022-11-26 00:15:46,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:46,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:46,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:48,412 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:15:48,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:48,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445836946] [2022-11-26 00:15:48,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445836946] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:15:48,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747153026] [2022-11-26 00:15:48,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:48,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:15:48,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:15:48,432 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:15:48,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:15:48,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:48,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-26 00:15:48,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:15:48,716 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 00:15:49,032 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 11 [2022-11-26 00:15:49,267 INFO L321 Elim1Store]: treesize reduction 36, result has 37.9 percent of original size [2022-11-26 00:15:49,267 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 23 treesize of output 33 [2022-11-26 00:15:49,320 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 21 treesize of output 9 [2022-11-26 00:15:49,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:15:49,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:15:49,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747153026] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:15:49,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1573732006] [2022-11-26 00:15:49,539 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-26 00:15:49,539 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:15:49,540 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:15:49,540 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:15:49,541 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:15:49,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:49,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:49,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:49,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-26 00:15:49,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:49,990 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 38 treesize of output 21 [2022-11-26 00:15:50,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:50,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:50,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 37 [2022-11-26 00:15:50,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:50,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:50,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 37 [2022-11-26 00:15:50,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,185 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 48 [2022-11-26 00:15:50,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,220 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 50 treesize of output 51 [2022-11-26 00:15:50,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,260 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 38 treesize of output 21 [2022-11-26 00:15:50,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2022-11-26 00:15:50,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2022-11-26 00:15:50,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,417 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 00:15:50,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,524 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 39 treesize of output 33 [2022-11-26 00:15:50,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:50,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:50,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 51 [2022-11-26 00:15:50,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:50,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:50,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 51 [2022-11-26 00:15:50,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,818 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 33 [2022-11-26 00:15:50,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:50,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:50,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:50,868 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-11-26 00:15:50,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:50,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:50,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:50,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:50,910 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-11-26 00:15:51,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:51,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:51,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:51,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:51,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:51,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:51,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:51,489 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-11-26 00:15:51,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:51,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:51,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:51,539 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 33 [2022-11-26 00:15:51,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:51,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:51,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:51,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:51,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:51,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:51,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:51,582 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-11-26 00:15:51,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:51,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:51,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:51,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-26 00:15:52,087 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 23 treesize of output 1 [2022-11-26 00:15:52,121 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-26 00:15:52,122 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 23 treesize of output 22 [2022-11-26 00:15:52,162 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-26 00:15:52,163 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 23 treesize of output 22 [2022-11-26 00:15:52,318 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 11 [2022-11-26 00:15:52,335 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 23 treesize of output 1 [2022-11-26 00:15:52,352 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 11 [2022-11-26 00:15:52,485 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-26 00:15:52,485 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 31 treesize of output 21 [2022-11-26 00:15:52,509 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 00:15:52,543 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-26 00:15:52,543 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 31 treesize of output 21 [2022-11-26 00:15:52,681 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-26 00:15:52,681 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 29 treesize of output 40 [2022-11-26 00:15:52,745 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-26 00:15:52,746 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 25 treesize of output 23 [2022-11-26 00:15:52,804 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-26 00:15:52,805 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 29 treesize of output 40 [2022-11-26 00:15:53,039 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 54 for LOIs [2022-11-26 00:15:53,044 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:16:02,420 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23456#(and (<= |ULTIMATE.start_create_item_#in~cursor#1.offset| 8589934588) (<= 3 |ULTIMATE.start_create_item_#in~cursor#1.base|) (<= 3 |ULTIMATE.start_create_item_~cursor#1.base|) (<= (+ |ULTIMATE.start_create_item_~cursor#1.offset| 4) (select |#length| |ULTIMATE.start_create_item_~cursor#1.base|)) (<= |ULTIMATE.start_main_#t~ret30#1| 2147483647) (<= |ULTIMATE.start_append_one_#in~to#1| 2147483647) (= |~#list~0.offset| 0) (<= |ULTIMATE.start_create_item_#in~at#1| 2147483647) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_#t~ret30#1| 2147483648)) (<= |ULTIMATE.start_append_one_~to#1| 2147483647) (<= |ULTIMATE.start_append_one_~list#1.base| 3) (<= 0 |ULTIMATE.start_append_one_~cursor~0#1.offset|) (<= |ULTIMATE.start_append_one_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_append_one_~list#1.offset|) (<= |ULTIMATE.start_append_one_~list#1.offset| 0) (= (select |#valid| |ULTIMATE.start_create_item_~cursor#1.base|) 1) (<= 3 |ULTIMATE.start_append_one_~cursor~0#1.base|) (= |ULTIMATE.start_main_~y~1#1| 0) (<= |ULTIMATE.start_create_item_~cursor#1.base| 3) (= 3 |~#list~0.base|) (<= 0 (+ 2147483648 |ULTIMATE.start_append_one_~to#1|)) (<= 0 |ULTIMATE.start_create_item_~cursor#1.offset|) (not (= (select |#valid| |ULTIMATE.start_create_item_#t~mem7#1.base|) 1)) (<= |ULTIMATE.start_append_one_~cursor~0#1.base| 3) (= |ULTIMATE.start_create_item_~item~0#1.offset| 0) (= |ULTIMATE.start_create_item_~h~0#1| 2) (<= |ULTIMATE.start_create_item_~at#1| 2147483647) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_create_item_~cursor#1.base|) |ULTIMATE.start_create_item_~cursor#1.offset|) |ULTIMATE.start_create_item_#t~mem7#1.offset|) (<= 0 (+ |ULTIMATE.start_append_one_#in~to#1| 2147483648)) (<= 0 |ULTIMATE.start_append_one_#in~list#1.offset|) (= |ULTIMATE.start_create_item_~y~0#1| 1) (<= 3 |ULTIMATE.start_append_one_~list#1.base|) (<= 0 (+ |ULTIMATE.start_create_item_~at#1| 2147483648)) (= |ULTIMATE.start_main_~z~0#1| 0) |ULTIMATE.start_create_item_#t~short10#1| (<= |ULTIMATE.start_append_one_~cursor~0#1.offset| 8589934588) (<= |ULTIMATE.start_create_item_#in~cursor#1.base| 3) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_create_item_#in~cursor#1.offset|) (<= 0 (+ |ULTIMATE.start_create_item_#in~at#1| 2147483648)) (<= |ULTIMATE.start_create_item_~cursor#1.offset| 8589934588) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_item_~cursor#1.base|) |ULTIMATE.start_create_item_~cursor#1.offset|) |ULTIMATE.start_create_item_#t~mem7#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~length~0#1| 0) (<= |ULTIMATE.start_append_one_#in~list#1.base| 3) (= |#NULL.base| 0) (<= 3 |ULTIMATE.start_append_one_#in~list#1.base|))' at error location [2022-11-26 00:16:02,420 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:16:02,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:16:02,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 20 [2022-11-26 00:16:02,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039162572] [2022-11-26 00:16:02,421 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:16:02,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 00:16:02,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:16:02,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 00:16:02,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1569, Unknown=0, NotChecked=0, Total=1806 [2022-11-26 00:16:02,423 INFO L87 Difference]: Start difference. First operand 378 states and 515 transitions. Second operand has 20 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:16:05,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:16:05,302 INFO L93 Difference]: Finished difference Result 632 states and 820 transitions. [2022-11-26 00:16:05,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-26 00:16:05,302 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 35 [2022-11-26 00:16:05,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:16:05,306 INFO L225 Difference]: With dead ends: 632 [2022-11-26 00:16:05,306 INFO L226 Difference]: Without dead ends: 632 [2022-11-26 00:16:05,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=479, Invalid=3181, Unknown=0, NotChecked=0, Total=3660 [2022-11-26 00:16:05,308 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 725 mSDsluCounter, 1213 mSDsCounter, 0 mSdLazyCounter, 1783 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 1321 SdHoareTripleChecker+Invalid, 1825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:16:05,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [727 Valid, 1321 Invalid, 1825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1783 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-26 00:16:05,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-11-26 00:16:05,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 445. [2022-11-26 00:16:05,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 373 states have (on average 1.522788203753351) internal successors, (568), 419 states have internal predecessors, (568), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-26 00:16:05,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 606 transitions. [2022-11-26 00:16:05,320 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 606 transitions. Word has length 35 [2022-11-26 00:16:05,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:16:05,320 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 606 transitions. [2022-11-26 00:16:05,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:16:05,320 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 606 transitions. [2022-11-26 00:16:05,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-26 00:16:05,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:16:05,321 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:16:05,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-26 00:16:05,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:16:05,528 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:16:05,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:16:05,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1535040592, now seen corresponding path program 1 times [2022-11-26 00:16:05,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:16:05,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570941758] [2022-11-26 00:16:05,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:05,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:16:05,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:16:07,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:16:07,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:16:07,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570941758] [2022-11-26 00:16:07,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570941758] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:16:07,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260900679] [2022-11-26 00:16:07,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:07,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:16:07,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:16:07,456 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:16:07,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:16:07,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:16:07,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-26 00:16:07,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:16:07,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:16:08,208 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 15 treesize of output 11 [2022-11-26 00:16:08,230 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 11 [2022-11-26 00:16:08,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:08,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:08,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:16:08,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 40 [2022-11-26 00:16:08,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:08,536 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 27 treesize of output 26 [2022-11-26 00:16:08,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:08,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-26 00:16:08,907 INFO L321 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2022-11-26 00:16:08,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-11-26 00:16:08,985 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 19 treesize of output 7 [2022-11-26 00:16:08,990 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 31 treesize of output 13 [2022-11-26 00:16:09,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:16:09,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:16:19,550 WARN L233 SmtUtils]: Spent 10.17s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:16:19,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260900679] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:16:19,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [270215952] [2022-11-26 00:16:19,680 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2022-11-26 00:16:19,680 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:16:19,680 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:16:19,680 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:16:19,681 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:16:19,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:19,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:19,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:19,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-26 00:16:20,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:16:20,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:16:20,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 37 [2022-11-26 00:16:20,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,093 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 38 treesize of output 21 [2022-11-26 00:16:20,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:16:20,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:16:20,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 37 [2022-11-26 00:16:20,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,251 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 50 treesize of output 51 [2022-11-26 00:16:20,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,290 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 38 treesize of output 21 [2022-11-26 00:16:20,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,330 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 48 [2022-11-26 00:16:20,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2022-11-26 00:16:20,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,463 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 00:16:20,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2022-11-26 00:16:20,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:16:20,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:16:20,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 51 [2022-11-26 00:16:20,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,660 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 39 treesize of output 33 [2022-11-26 00:16:20,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:16:20,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:16:20,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 51 [2022-11-26 00:16:20,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,897 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 33 [2022-11-26 00:16:20,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:16:20,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:16:20,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:16:20,966 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-11-26 00:16:20,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:16:20,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:20,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:21,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:16:21,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:21,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:16:21,003 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-11-26 00:16:21,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:21,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:21,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:21,180 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 33 [2022-11-26 00:16:21,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:21,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:21,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:21,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:16:21,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:16:21,222 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-11-26 00:16:21,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:21,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:21,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:21,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:16:21,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:16:21,274 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-11-26 00:16:21,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:21,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:21,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:21,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:16:21,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:16:21,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-11-26 00:16:21,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:21,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:21,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:21,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:16:21,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:16:21,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2022-11-26 00:16:21,836 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 00:16:21,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:16:22,000 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-26 00:16:22,001 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 30 treesize of output 25 [2022-11-26 00:16:22,042 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-26 00:16:22,043 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 30 treesize of output 25 [2022-11-26 00:16:22,068 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 23 treesize of output 1 [2022-11-26 00:16:22,125 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 23 treesize of output 1 [2022-11-26 00:16:22,184 INFO L321 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2022-11-26 00:16:22,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 39 [2022-11-26 00:16:22,246 INFO L321 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2022-11-26 00:16:22,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2022-11-26 00:16:22,379 INFO L321 Elim1Store]: treesize reduction 116, result has 31.0 percent of original size [2022-11-26 00:16:22,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 6 case distinctions, treesize of input 49 treesize of output 61 [2022-11-26 00:16:22,508 INFO L321 Elim1Store]: treesize reduction 116, result has 31.0 percent of original size [2022-11-26 00:16:22,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 6 case distinctions, treesize of input 49 treesize of output 61 [2022-11-26 00:16:22,552 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 00:16:22,562 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-26 00:16:22,572 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-26 00:16:23,436 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 00:16:23,455 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 00:16:23,474 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 00:16:24,177 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 11 [2022-11-26 00:16:24,195 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 11 [2022-11-26 00:16:24,217 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 23 treesize of output 1 [2022-11-26 00:16:24,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:24,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:16:24,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-11-26 00:16:24,333 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 23 treesize of output 1 [2022-11-26 00:16:24,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:24,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:16:24,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-11-26 00:16:24,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:24,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 37 treesize of output 35 [2022-11-26 00:16:24,838 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:16:24,838 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 17 treesize of output 21 [2022-11-26 00:16:25,242 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 23 treesize of output 1 [2022-11-26 00:16:25,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:25,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:16:25,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:25,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:16:25,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-26 00:16:25,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:25,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:16:25,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:25,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:16:25,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 49 [2022-11-26 00:16:25,514 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 23 treesize of output 1 [2022-11-26 00:16:25,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:25,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:25,575 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 49 treesize of output 54 [2022-11-26 00:16:25,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:25,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:25,610 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 68 treesize of output 57 [2022-11-26 00:16:25,691 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 00:16:25,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:25,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:25,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:25,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:25,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 60 [2022-11-26 00:16:25,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:25,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:25,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:25,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:25,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 57 [2022-11-26 00:16:25,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:25,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:16:25,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:25,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:25,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:16:26,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 57 [2022-11-26 00:16:26,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:26,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:16:26,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:26,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:26,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:16:26,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 60 [2022-11-26 00:16:26,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:26,092 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 25 treesize of output 13 [2022-11-26 00:16:26,228 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 23 treesize of output 1 [2022-11-26 00:16:26,241 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 11 [2022-11-26 00:16:26,262 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 11 [2022-11-26 00:16:26,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:26,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:16:26,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-11-26 00:16:26,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:26,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:16:26,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-11-26 00:16:26,418 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 23 treesize of output 1 [2022-11-26 00:16:27,739 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 00:16:27,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:16:27,990 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-26 00:16:27,990 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 23 treesize of output 22 [2022-11-26 00:16:28,006 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 23 treesize of output 1 [2022-11-26 00:16:28,038 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-26 00:16:28,038 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 23 treesize of output 22 [2022-11-26 00:16:28,168 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 23 treesize of output 1 [2022-11-26 00:16:28,181 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 11 [2022-11-26 00:16:28,196 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 11 [2022-11-26 00:16:28,276 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 00:16:28,310 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-26 00:16:28,311 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 31 treesize of output 21 [2022-11-26 00:16:28,356 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-26 00:16:28,356 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 31 treesize of output 21 [2022-11-26 00:16:28,504 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-26 00:16:28,505 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 25 treesize of output 23 [2022-11-26 00:16:28,570 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-26 00:16:28,571 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 29 treesize of output 40 [2022-11-26 00:16:28,632 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-26 00:16:28,632 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 29 treesize of output 40 [2022-11-26 00:16:29,048 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 104 for LOIs [2022-11-26 00:16:29,076 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:16:44,211 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24743#(and (<= |ULTIMATE.start_create_item_#in~cursor#1.offset| 8589934588) (<= |~#list~0.base| 3) (<= 3 |ULTIMATE.start_create_item_#in~cursor#1.base|) (<= 3 |ULTIMATE.start_create_item_~cursor#1.base|) (<= (+ |ULTIMATE.start_create_item_~cursor#1.offset| 4) (select |#length| |ULTIMATE.start_create_item_~cursor#1.base|)) (<= |ULTIMATE.start_main_#t~ret30#1| 2147483647) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_append_one_#in~to#1| 2147483647) (<= |ULTIMATE.start_create_item_#in~at#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_#t~ret30#1| 2147483648)) (<= |ULTIMATE.start_append_one_~to#1| 2147483647) (<= |ULTIMATE.start_main_~z~0#1| 0) (<= |ULTIMATE.start_append_one_~list#1.base| 3) (<= 0 |ULTIMATE.start_append_one_~cursor~0#1.offset|) (<= |ULTIMATE.start_append_one_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_append_one_~list#1.offset|) (<= |ULTIMATE.start_append_one_~list#1.offset| 0) (= (select |#valid| |ULTIMATE.start_create_item_~cursor#1.base|) 1) (<= 3 |ULTIMATE.start_append_one_~cursor~0#1.base|) (<= |ULTIMATE.start_create_item_~cursor#1.base| 3) (<= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~y~1#1|) (<= 0 (+ 2147483648 |ULTIMATE.start_append_one_~to#1|)) (<= |ULTIMATE.start_main_~y~1#1| 4) (<= 0 |ULTIMATE.start_create_item_~cursor#1.offset|) (<= |ULTIMATE.start_append_one_~cursor~0#1.base| 3) (<= |#NULL.offset| 0) (= |ULTIMATE.start_create_item_~item~0#1.offset| 0) (= |ULTIMATE.start_create_item_~h~0#1| 2) (<= |ULTIMATE.start_create_item_~at#1| 2147483647) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_create_item_~cursor#1.base|) |ULTIMATE.start_create_item_~cursor#1.offset|) |ULTIMATE.start_create_item_#t~mem7#1.offset|) (<= 0 |ULTIMATE.start_main_~length~0#1|) (<= 0 (+ |ULTIMATE.start_append_one_#in~to#1| 2147483648)) (<= 0 |ULTIMATE.start_append_one_#in~list#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_create_item_~y~0#1| 1) (<= 3 |ULTIMATE.start_append_one_~list#1.base|) (<= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_create_item_~at#1| 2147483648)) |ULTIMATE.start_create_item_#t~short10#1| (<= |ULTIMATE.start_append_one_~cursor~0#1.offset| 8589934588) (<= |ULTIMATE.start_create_item_#in~cursor#1.base| 3) (<= 0 |ULTIMATE.start_create_item_#in~cursor#1.offset|) (or (not (<= 0 (+ (* 4 |ULTIMATE.start_create_item_~link_field~0#1|) |ULTIMATE.start_create_item_#t~mem7#1.offset|))) (not (<= (+ (* 4 |ULTIMATE.start_create_item_~link_field~0#1|) |ULTIMATE.start_create_item_#t~mem7#1.offset| 4) (select |#length| |ULTIMATE.start_create_item_#t~mem7#1.base|)))) (<= 0 (+ |ULTIMATE.start_create_item_#in~at#1| 2147483648)) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_create_item_~cursor#1.offset| 8589934588) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_item_~cursor#1.base|) |ULTIMATE.start_create_item_~cursor#1.offset|) |ULTIMATE.start_create_item_#t~mem7#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_append_one_#in~list#1.base| 3) (<= |~#list~0.offset| 0) (<= 0 |ULTIMATE.start_main_~z~0#1|) (<= 3 |ULTIMATE.start_append_one_#in~list#1.base|))' at error location [2022-11-26 00:16:44,211 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:16:44,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:16:44,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2022-11-26 00:16:44,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614352536] [2022-11-26 00:16:44,211 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:16:44,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-26 00:16:44,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:16:44,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-26 00:16:44,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=2811, Unknown=0, NotChecked=0, Total=3080 [2022-11-26 00:16:44,214 INFO L87 Difference]: Start difference. First operand 445 states and 606 transitions. Second operand has 27 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:16:51,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:16:51,869 INFO L93 Difference]: Finished difference Result 1170 states and 1442 transitions. [2022-11-26 00:16:51,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-26 00:16:51,870 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2022-11-26 00:16:51,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:16:51,874 INFO L225 Difference]: With dead ends: 1170 [2022-11-26 00:16:51,874 INFO L226 Difference]: Without dead ends: 1170 [2022-11-26 00:16:51,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 31.1s TimeCoverageRelationStatistics Valid=938, Invalid=7618, Unknown=0, NotChecked=0, Total=8556 [2022-11-26 00:16:51,877 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 3288 mSDsluCounter, 1648 mSDsCounter, 0 mSdLazyCounter, 2585 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3289 SdHoareTripleChecker+Valid, 1760 SdHoareTripleChecker+Invalid, 2712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 2585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:16:51,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3289 Valid, 1760 Invalid, 2712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 2585 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-26 00:16:51,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2022-11-26 00:16:51,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 559. [2022-11-26 00:16:51,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 478 states have (on average 1.5397489539748954) internal successors, (736), 526 states have internal predecessors, (736), 25 states have call successors, (25), 12 states have call predecessors, (25), 12 states have return successors, (25), 20 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-26 00:16:51,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 786 transitions. [2022-11-26 00:16:51,897 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 786 transitions. Word has length 36 [2022-11-26 00:16:51,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:16:51,898 INFO L495 AbstractCegarLoop]: Abstraction has 559 states and 786 transitions. [2022-11-26 00:16:51,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:16:51,898 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 786 transitions. [2022-11-26 00:16:51,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-26 00:16:51,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:16:51,899 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:16:51,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:16:52,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-26 00:16:52,108 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:16:52,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:16:52,108 INFO L85 PathProgramCache]: Analyzing trace with hash -538450689, now seen corresponding path program 1 times [2022-11-26 00:16:52,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:16:52,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775882826] [2022-11-26 00:16:52,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:52,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:16:52,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:16:52,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:16:52,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:16:52,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775882826] [2022-11-26 00:16:52,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775882826] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:16:52,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127308907] [2022-11-26 00:16:52,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:52,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:16:52,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:16:52,184 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:16:52,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:16:52,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:16:52,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:16:52,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:16:52,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:16:52,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:16:52,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127308907] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:16:52,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:16:52,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-11-26 00:16:52,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991904930] [2022-11-26 00:16:52,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:16:52,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:16:52,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:16:52,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:16:52,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:16:52,454 INFO L87 Difference]: Start difference. First operand 559 states and 786 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:16:52,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:16:52,576 INFO L93 Difference]: Finished difference Result 890 states and 1260 transitions. [2022-11-26 00:16:52,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:16:52,576 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-11-26 00:16:52,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:16:52,580 INFO L225 Difference]: With dead ends: 890 [2022-11-26 00:16:52,580 INFO L226 Difference]: Without dead ends: 890 [2022-11-26 00:16:52,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 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 00:16:52,581 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 234 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:16:52,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 260 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:16:52,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2022-11-26 00:16:52,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 606. [2022-11-26 00:16:52,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 525 states have (on average 1.5276190476190477) internal successors, (802), 573 states have internal predecessors, (802), 25 states have call successors, (25), 12 states have call predecessors, (25), 12 states have return successors, (25), 20 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-26 00:16:52,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 852 transitions. [2022-11-26 00:16:52,606 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 852 transitions. Word has length 37 [2022-11-26 00:16:52,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:16:52,606 INFO L495 AbstractCegarLoop]: Abstraction has 606 states and 852 transitions. [2022-11-26 00:16:52,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:16:52,607 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 852 transitions. [2022-11-26 00:16:52,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-26 00:16:52,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:16:52,608 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:16:52,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:16:52,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:16:52,816 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:16:52,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:16:52,816 INFO L85 PathProgramCache]: Analyzing trace with hash -538452439, now seen corresponding path program 1 times [2022-11-26 00:16:52,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:16:52,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289898201] [2022-11-26 00:16:52,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:52,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:16:52,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:16:53,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:16:53,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:16:53,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289898201] [2022-11-26 00:16:53,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289898201] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:16:53,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:16:53,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-26 00:16:53,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339492376] [2022-11-26 00:16:53,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:16:53,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-26 00:16:53,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:16:53,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-26 00:16:53,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:16:53,786 INFO L87 Difference]: Start difference. First operand 606 states and 852 transitions. Second operand has 11 states, 10 states have (on average 3.5) internal successors, (35), 11 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:16:54,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:16:54,983 INFO L93 Difference]: Finished difference Result 1006 states and 1346 transitions. [2022-11-26 00:16:54,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-26 00:16:54,983 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.5) internal successors, (35), 11 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-11-26 00:16:54,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:16:54,988 INFO L225 Difference]: With dead ends: 1006 [2022-11-26 00:16:54,988 INFO L226 Difference]: Without dead ends: 1006 [2022-11-26 00:16:54,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2022-11-26 00:16:54,988 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 1006 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1008 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:16:54,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1008 Valid, 669 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 00:16:54,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2022-11-26 00:16:55,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 720. [2022-11-26 00:16:55,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 628 states have (on average 1.5031847133757963) internal successors, (944), 679 states have internal predecessors, (944), 33 states have call successors, (33), 16 states have call predecessors, (33), 16 states have return successors, (33), 24 states have call predecessors, (33), 33 states have call successors, (33) [2022-11-26 00:16:55,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 1010 transitions. [2022-11-26 00:16:55,007 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 1010 transitions. Word has length 37 [2022-11-26 00:16:55,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:16:55,007 INFO L495 AbstractCegarLoop]: Abstraction has 720 states and 1010 transitions. [2022-11-26 00:16:55,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.5) internal successors, (35), 11 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:16:55,008 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 1010 transitions. [2022-11-26 00:16:55,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-26 00:16:55,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:16:55,008 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:16:55,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-11-26 00:16:55,009 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:16:55,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:16:55,009 INFO L85 PathProgramCache]: Analyzing trace with hash -538452438, now seen corresponding path program 1 times [2022-11-26 00:16:55,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:16:55,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911074757] [2022-11-26 00:16:55,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:55,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:16:55,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:16:56,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:16:56,965 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:16:56,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911074757] [2022-11-26 00:16:56,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911074757] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:16:56,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:16:56,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-26 00:16:56,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796325408] [2022-11-26 00:16:56,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:16:56,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-26 00:16:56,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:16:56,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-26 00:16:56,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:16:56,967 INFO L87 Difference]: Start difference. First operand 720 states and 1010 transitions. Second operand has 13 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:16:59,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:16:59,058 INFO L93 Difference]: Finished difference Result 1084 states and 1430 transitions. [2022-11-26 00:16:59,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-26 00:16:59,059 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-11-26 00:16:59,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:16:59,063 INFO L225 Difference]: With dead ends: 1084 [2022-11-26 00:16:59,063 INFO L226 Difference]: Without dead ends: 1084 [2022-11-26 00:16:59,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=180, Invalid=576, Unknown=0, NotChecked=0, Total=756 [2022-11-26 00:16:59,064 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 1322 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1323 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:16:59,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1323 Valid, 1027 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 00:16:59,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2022-11-26 00:16:59,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 774. [2022-11-26 00:16:59,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 679 states have (on average 1.5139911634756995) internal successors, (1028), 731 states have internal predecessors, (1028), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (35), 25 states have call predecessors, (35), 35 states have call successors, (35) [2022-11-26 00:16:59,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1098 transitions. [2022-11-26 00:16:59,085 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1098 transitions. Word has length 37 [2022-11-26 00:16:59,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:16:59,085 INFO L495 AbstractCegarLoop]: Abstraction has 774 states and 1098 transitions. [2022-11-26 00:16:59,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:16:59,086 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1098 transitions. [2022-11-26 00:16:59,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-26 00:16:59,086 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:16:59,086 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:16:59,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-11-26 00:16:59,087 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:16:59,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:16:59,087 INFO L85 PathProgramCache]: Analyzing trace with hash -2126650194, now seen corresponding path program 1 times [2022-11-26 00:16:59,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:16:59,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901413793] [2022-11-26 00:16:59,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:59,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:16:59,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:16:59,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:16:59,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:16:59,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901413793] [2022-11-26 00:16:59,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901413793] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:16:59,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:16:59,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:16:59,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107537115] [2022-11-26 00:16:59,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:16:59,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:16:59,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:16:59,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:16:59,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:16:59,229 INFO L87 Difference]: Start difference. First operand 774 states and 1098 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-26 00:16:59,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:16:59,362 INFO L93 Difference]: Finished difference Result 957 states and 1327 transitions. [2022-11-26 00:16:59,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:16:59,363 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2022-11-26 00:16:59,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:16:59,366 INFO L225 Difference]: With dead ends: 957 [2022-11-26 00:16:59,366 INFO L226 Difference]: Without dead ends: 957 [2022-11-26 00:16:59,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:16:59,368 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 329 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:16:59,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 204 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:16:59,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-11-26 00:16:59,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 773. [2022-11-26 00:16:59,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 679 states have (on average 1.5051546391752577) internal successors, (1022), 730 states have internal predecessors, (1022), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (35), 25 states have call predecessors, (35), 35 states have call successors, (35) [2022-11-26 00:16:59,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 1092 transitions. [2022-11-26 00:16:59,407 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 1092 transitions. Word has length 38 [2022-11-26 00:16:59,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:16:59,407 INFO L495 AbstractCegarLoop]: Abstraction has 773 states and 1092 transitions. [2022-11-26 00:16:59,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-26 00:16:59,408 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 1092 transitions. [2022-11-26 00:16:59,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-26 00:16:59,409 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:16:59,409 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:16:59,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-11-26 00:16:59,410 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:16:59,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:16:59,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1501646345, now seen corresponding path program 1 times [2022-11-26 00:16:59,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:16:59,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869166784] [2022-11-26 00:16:59,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:59,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:16:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:17:00,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:17:00,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:17:00,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869166784] [2022-11-26 00:17:00,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869166784] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:17:00,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:17:00,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-26 00:17:00,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894326940] [2022-11-26 00:17:00,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:17:00,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 00:17:00,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:17:00,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 00:17:00,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:17:00,413 INFO L87 Difference]: Start difference. First operand 773 states and 1092 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:17:02,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:17:02,704 INFO L93 Difference]: Finished difference Result 1678 states and 2264 transitions. [2022-11-26 00:17:02,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-26 00:17:02,705 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2022-11-26 00:17:02,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:17:02,713 INFO L225 Difference]: With dead ends: 1678 [2022-11-26 00:17:02,713 INFO L226 Difference]: Without dead ends: 1674 [2022-11-26 00:17:02,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=239, Invalid=573, Unknown=0, NotChecked=0, Total=812 [2022-11-26 00:17:02,714 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 1281 mSDsluCounter, 1383 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1281 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:17:02,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1281 Valid, 1609 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1045 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-26 00:17:02,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2022-11-26 00:17:02,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 799. [2022-11-26 00:17:02,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 702 states have (on average 1.5071225071225072) internal successors, (1058), 754 states have internal predecessors, (1058), 37 states have call successors, (37), 18 states have call predecessors, (37), 18 states have return successors, (37), 26 states have call predecessors, (37), 37 states have call successors, (37) [2022-11-26 00:17:02,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1132 transitions. [2022-11-26 00:17:02,742 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1132 transitions. Word has length 39 [2022-11-26 00:17:02,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:17:02,743 INFO L495 AbstractCegarLoop]: Abstraction has 799 states and 1132 transitions. [2022-11-26 00:17:02,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:17:02,743 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1132 transitions. [2022-11-26 00:17:02,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-26 00:17:02,744 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:17:02,744 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:17:02,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-11-26 00:17:02,745 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:17:02,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:17:02,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1869874587, now seen corresponding path program 1 times [2022-11-26 00:17:02,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:17:02,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804275895] [2022-11-26 00:17:02,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:02,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:17:02,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:17:02,856 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:17:02,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:17:02,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804275895] [2022-11-26 00:17:02,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804275895] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:17:02,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:17:02,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:17:02,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099077339] [2022-11-26 00:17:02,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:17:02,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:17:02,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:17:02,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:17:02,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:17:02,860 INFO L87 Difference]: Start difference. First operand 799 states and 1132 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:17:03,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:17:03,194 INFO L93 Difference]: Finished difference Result 895 states and 1261 transitions. [2022-11-26 00:17:03,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:17:03,194 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-11-26 00:17:03,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:17:03,197 INFO L225 Difference]: With dead ends: 895 [2022-11-26 00:17:03,197 INFO L226 Difference]: Without dead ends: 895 [2022-11-26 00:17:03,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:17:03,197 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 113 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:17:03,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 346 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:17:03,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-11-26 00:17:03,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 799. [2022-11-26 00:17:03,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 702 states have (on average 1.5042735042735043) internal successors, (1056), 754 states have internal predecessors, (1056), 37 states have call successors, (37), 18 states have call predecessors, (37), 18 states have return successors, (37), 26 states have call predecessors, (37), 37 states have call successors, (37) [2022-11-26 00:17:03,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1130 transitions. [2022-11-26 00:17:03,218 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1130 transitions. Word has length 39 [2022-11-26 00:17:03,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:17:03,218 INFO L495 AbstractCegarLoop]: Abstraction has 799 states and 1130 transitions. [2022-11-26 00:17:03,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:17:03,219 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1130 transitions. [2022-11-26 00:17:03,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-26 00:17:03,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:17:03,220 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:17:03,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-11-26 00:17:03,220 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:17:03,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:17:03,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1869874586, now seen corresponding path program 1 times [2022-11-26 00:17:03,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:17:03,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341795953] [2022-11-26 00:17:03,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:03,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:17:03,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:17:03,397 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:17:03,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:17:03,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341795953] [2022-11-26 00:17:03,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341795953] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:17:03,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:17:03,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:17:03,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457727440] [2022-11-26 00:17:03,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:17:03,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:17:03,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:17:03,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:17:03,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:17:03,403 INFO L87 Difference]: Start difference. First operand 799 states and 1130 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:17:03,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:17:03,696 INFO L93 Difference]: Finished difference Result 819 states and 1114 transitions. [2022-11-26 00:17:03,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:17:03,696 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-11-26 00:17:03,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:17:03,700 INFO L225 Difference]: With dead ends: 819 [2022-11-26 00:17:03,700 INFO L226 Difference]: Without dead ends: 819 [2022-11-26 00:17:03,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:17:03,701 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 116 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:17:03,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 404 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:17:03,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2022-11-26 00:17:03,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 794. [2022-11-26 00:17:03,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 701 states have (on average 1.479315263908702) internal successors, (1037), 749 states have internal predecessors, (1037), 37 states have call successors, (37), 18 states have call predecessors, (37), 18 states have return successors, (37), 26 states have call predecessors, (37), 37 states have call successors, (37) [2022-11-26 00:17:03,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1111 transitions. [2022-11-26 00:17:03,719 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1111 transitions. Word has length 39 [2022-11-26 00:17:03,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:17:03,719 INFO L495 AbstractCegarLoop]: Abstraction has 794 states and 1111 transitions. [2022-11-26 00:17:03,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:17:03,720 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1111 transitions. [2022-11-26 00:17:03,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-26 00:17:03,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:17:03,721 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:17:03,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-11-26 00:17:03,721 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:17:03,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:17:03,722 INFO L85 PathProgramCache]: Analyzing trace with hash -2056685534, now seen corresponding path program 1 times [2022-11-26 00:17:03,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:17:03,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272457484] [2022-11-26 00:17:03,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:03,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:17:03,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:17:04,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:17:04,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:17:04,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272457484] [2022-11-26 00:17:04,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272457484] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:17:04,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:17:04,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-26 00:17:04,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208181632] [2022-11-26 00:17:04,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:17:04,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-26 00:17:04,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:17:04,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-26 00:17:04,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:17:04,623 INFO L87 Difference]: Start difference. First operand 794 states and 1111 transitions. Second operand has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 10 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:17:05,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:17:05,799 INFO L93 Difference]: Finished difference Result 1013 states and 1333 transitions. [2022-11-26 00:17:05,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-26 00:17:05,800 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 10 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-11-26 00:17:05,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:17:05,804 INFO L225 Difference]: With dead ends: 1013 [2022-11-26 00:17:05,804 INFO L226 Difference]: Without dead ends: 1013 [2022-11-26 00:17:05,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2022-11-26 00:17:05,806 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 891 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:17:05,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [891 Valid, 684 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:17:05,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-11-26 00:17:05,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 800. [2022-11-26 00:17:05,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 707 states have (on average 1.4823196605374822) internal successors, (1048), 755 states have internal predecessors, (1048), 37 states have call successors, (37), 18 states have call predecessors, (37), 18 states have return successors, (37), 26 states have call predecessors, (37), 37 states have call successors, (37) [2022-11-26 00:17:05,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1122 transitions. [2022-11-26 00:17:05,826 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1122 transitions. Word has length 39 [2022-11-26 00:17:05,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:17:05,826 INFO L495 AbstractCegarLoop]: Abstraction has 800 states and 1122 transitions. [2022-11-26 00:17:05,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 10 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:17:05,827 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1122 transitions. [2022-11-26 00:17:05,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-26 00:17:05,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:17:05,828 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:17:05,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-11-26 00:17:05,828 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:17:05,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:17:05,829 INFO L85 PathProgramCache]: Analyzing trace with hash 693976117, now seen corresponding path program 1 times [2022-11-26 00:17:05,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:17:05,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596582602] [2022-11-26 00:17:05,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:05,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:17:05,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:17:06,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:17:06,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:17:06,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596582602] [2022-11-26 00:17:06,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596582602] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:17:06,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:17:06,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-26 00:17:06,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814028008] [2022-11-26 00:17:06,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:17:06,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:17:06,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:17:06,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:17:06,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:17:06,184 INFO L87 Difference]: Start difference. First operand 800 states and 1122 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:17:06,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:17:06,622 INFO L93 Difference]: Finished difference Result 884 states and 1195 transitions. [2022-11-26 00:17:06,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:17:06,623 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 40 [2022-11-26 00:17:06,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:17:06,627 INFO L225 Difference]: With dead ends: 884 [2022-11-26 00:17:06,627 INFO L226 Difference]: Without dead ends: 884 [2022-11-26 00:17:06,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:17:06,628 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 355 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:17:06,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 305 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:17:06,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-11-26 00:17:06,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 798. [2022-11-26 00:17:06,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 707 states have (on average 1.4596888260254597) internal successors, (1032), 753 states have internal predecessors, (1032), 37 states have call successors, (37), 18 states have call predecessors, (37), 18 states have return successors, (37), 26 states have call predecessors, (37), 37 states have call successors, (37) [2022-11-26 00:17:06,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1106 transitions. [2022-11-26 00:17:06,667 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1106 transitions. Word has length 40 [2022-11-26 00:17:06,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:17:06,669 INFO L495 AbstractCegarLoop]: Abstraction has 798 states and 1106 transitions. [2022-11-26 00:17:06,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:17:06,670 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1106 transitions. [2022-11-26 00:17:06,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-26 00:17:06,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:17:06,671 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:17:06,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-11-26 00:17:06,671 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:17:06,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:17:06,673 INFO L85 PathProgramCache]: Analyzing trace with hash 46045733, now seen corresponding path program 1 times [2022-11-26 00:17:06,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:17:06,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189609744] [2022-11-26 00:17:06,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:06,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:17:06,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:17:06,802 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:17:06,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:17:06,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189609744] [2022-11-26 00:17:06,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189609744] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:17:06,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147506761] [2022-11-26 00:17:06,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:06,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:06,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:17:06,805 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:17:06,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:17:07,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:17:07,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-26 00:17:07,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:17:07,198 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:17:07,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:17:07,225 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-26 00:17:07,226 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 12 treesize of output 11 [2022-11-26 00:17:07,254 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:17:07,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147506761] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:17:07,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1338403951] [2022-11-26 00:17:07,257 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2022-11-26 00:17:07,257 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:17:07,258 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:17:07,258 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:17:07,258 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:17:07,927 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-11-26 00:17:07,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 49 [2022-11-26 00:17:08,535 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-11-26 00:17:08,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 49 [2022-11-26 00:17:08,870 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 13 for LOIs [2022-11-26 00:17:08,871 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:17:15,774 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '43224#(and (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_main_#t~ret35#1|) (= |ULTIMATE.start_main_~y~1#1| 0) (= |ULTIMATE.start_remove_one_#in~from#1| |ULTIMATE.start_remove_one_~from#1|) (<= |ULTIMATE.start_remove_one_#in~list#1.base| 3) (= |ULTIMATE.start_remove_one_#in~from#1| |ULTIMATE.start_main_#t~ret35#1|) (not (= (select |#valid| |ULTIMATE.start_is_empty_~list#1.base|) 1)) (<= 3 |ULTIMATE.start_is_empty_~list#1.base|) (= |ULTIMATE.start_remove_one_#in~list#1.base| |~#list~0.base|) (<= |ULTIMATE.start_is_empty_~list#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 3 |ULTIMATE.start_remove_one_#in~list#1.base|) (= |~#list~0.offset| |ULTIMATE.start_remove_one_#in~list#1.offset|) (= |ULTIMATE.start_is_empty_~list#1.offset| |ULTIMATE.start_is_empty_#in~list#1.offset|) (<= |ULTIMATE.start_remove_one_~list#1.base| 3) (= |ULTIMATE.start_main_~z~0#1| 0) (<= 0 |ULTIMATE.start_remove_one_#in~list#1.offset|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_is_empty_~list#1.offset|) (= |ULTIMATE.start_is_empty_#in~list#1.base| |ULTIMATE.start_remove_one_~list#1.base|) (<= 3 |ULTIMATE.start_remove_one_~list#1.base|) (= |ULTIMATE.start_remove_one_~list#1.offset| |ULTIMATE.start_remove_one_#in~list#1.offset|) (<= |ULTIMATE.start_is_empty_~list#1.base| 3) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~length~0#1| 0) (<= |ULTIMATE.start_remove_one_~list#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:17:15,774 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:17:15,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:17:15,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-26 00:17:15,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63981630] [2022-11-26 00:17:15,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:17:15,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 00:17:15,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:17:15,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 00:17:15,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2022-11-26 00:17:15,777 INFO L87 Difference]: Start difference. First operand 798 states and 1106 transitions. Second operand has 12 states, 11 states have (on average 6.0) internal successors, (66), 12 states have internal predecessors, (66), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:17:16,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:17:16,783 INFO L93 Difference]: Finished difference Result 2463 states and 3302 transitions. [2022-11-26 00:17:16,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 00:17:16,784 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.0) internal successors, (66), 12 states have internal predecessors, (66), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2022-11-26 00:17:16,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:17:16,793 INFO L225 Difference]: With dead ends: 2463 [2022-11-26 00:17:16,793 INFO L226 Difference]: Without dead ends: 2463 [2022-11-26 00:17:16,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=489, Invalid=1491, Unknown=0, NotChecked=0, Total=1980 [2022-11-26 00:17:16,794 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 1864 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1866 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:17:16,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1866 Valid, 714 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 00:17:16,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2463 states. [2022-11-26 00:17:16,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2463 to 1021. [2022-11-26 00:17:16,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 912 states have (on average 1.3980263157894737) internal successors, (1275), 957 states have internal predecessors, (1275), 53 states have call successors, (53), 26 states have call predecessors, (53), 26 states have return successors, (53), 37 states have call predecessors, (53), 53 states have call successors, (53) [2022-11-26 00:17:16,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1381 transitions. [2022-11-26 00:17:16,830 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1381 transitions. Word has length 41 [2022-11-26 00:17:16,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:17:16,831 INFO L495 AbstractCegarLoop]: Abstraction has 1021 states and 1381 transitions. [2022-11-26 00:17:16,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.0) internal successors, (66), 12 states have internal predecessors, (66), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:17:16,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1381 transitions. [2022-11-26 00:17:16,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-26 00:17:16,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:17:16,832 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:17:16,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:17:17,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-11-26 00:17:17,041 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:17:17,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:17:17,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1655938515, now seen corresponding path program 1 times [2022-11-26 00:17:17,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:17:17,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351085096] [2022-11-26 00:17:17,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:17,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:17:17,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:17:18,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:17:18,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:17:18,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351085096] [2022-11-26 00:17:18,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351085096] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:17:18,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629752882] [2022-11-26 00:17:18,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:18,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:18,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:17:18,742 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:17:18,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:17:19,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:17:19,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-26 00:17:19,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:17:19,315 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 11 [2022-11-26 00:17:19,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:19,416 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 31 treesize of output 30 [2022-11-26 00:17:20,112 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 26 treesize of output 18 [2022-11-26 00:17:20,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:20,120 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 37 treesize of output 21 [2022-11-26 00:17:20,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:17:20,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:17:20,328 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:17:20,328 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 42 treesize of output 46 [2022-11-26 00:17:20,828 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 246 treesize of output 230 [2022-11-26 00:17:21,205 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:17:21,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629752882] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:17:21,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [935057455] [2022-11-26 00:17:21,208 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2022-11-26 00:17:21,208 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:17:21,208 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:17:21,209 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:17:21,209 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:17:21,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:21,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:21,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:21,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-26 00:17:21,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:21,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:21,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:21,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:21,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 37 [2022-11-26 00:17:21,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:21,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:21,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:21,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:21,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 37 [2022-11-26 00:17:21,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:21,678 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 38 treesize of output 21 [2022-11-26 00:17:21,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:21,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:21,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:21,812 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 48 [2022-11-26 00:17:21,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:21,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:21,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:21,852 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 48 [2022-11-26 00:17:21,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:21,878 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 38 treesize of output 21 [2022-11-26 00:17:21,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:21,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:21,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:21,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:21,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:21,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2022-11-26 00:17:21,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:21,976 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 00:17:22,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2022-11-26 00:17:22,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:22,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:22,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 51 [2022-11-26 00:17:22,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,151 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 39 treesize of output 33 [2022-11-26 00:17:22,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:22,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:22,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 51 [2022-11-26 00:17:22,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,317 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 33 [2022-11-26 00:17:22,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:22,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:22,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:22,361 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-11-26 00:17:22,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:22,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:22,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:22,417 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-11-26 00:17:22,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:22,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:22,576 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-11-26 00:17:22,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:22,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:22,611 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-11-26 00:17:22,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,653 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 33 [2022-11-26 00:17:22,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:22,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:22,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-11-26 00:17:23,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:23,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:23,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:23,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:23,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:23,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2022-11-26 00:17:23,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:17:23,196 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 00:17:23,345 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-26 00:17:23,346 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 23 treesize of output 22 [2022-11-26 00:17:23,360 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 23 treesize of output 1 [2022-11-26 00:17:23,392 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-26 00:17:23,393 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 23 treesize of output 22 [2022-11-26 00:17:23,487 INFO L321 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2022-11-26 00:17:23,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2022-11-26 00:17:23,512 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 23 treesize of output 1 [2022-11-26 00:17:23,572 INFO L321 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2022-11-26 00:17:23,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2022-11-26 00:17:23,705 INFO L321 Elim1Store]: treesize reduction 116, result has 31.0 percent of original size [2022-11-26 00:17:23,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 61 [2022-11-26 00:17:23,737 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 00:17:23,831 INFO L321 Elim1Store]: treesize reduction 116, result has 31.0 percent of original size [2022-11-26 00:17:23,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 61 [2022-11-26 00:17:23,847 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-26 00:17:23,849 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-26 00:17:24,392 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 00:17:24,686 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 00:17:24,704 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 00:17:25,056 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 11 [2022-11-26 00:17:25,070 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 23 treesize of output 1 [2022-11-26 00:17:25,098 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 11 [2022-11-26 00:17:25,178 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 23 treesize of output 1 [2022-11-26 00:17:25,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:25,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:25,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-11-26 00:17:25,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:25,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:25,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-11-26 00:17:25,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:25,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 37 treesize of output 35 [2022-11-26 00:17:25,630 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:17:25,631 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 17 treesize of output 21 [2022-11-26 00:17:26,102 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-26 00:17:26,103 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 23 treesize of output 22 [2022-11-26 00:17:26,143 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-26 00:17:26,144 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 23 treesize of output 22 [2022-11-26 00:17:26,161 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 23 treesize of output 1 [2022-11-26 00:17:26,269 INFO L321 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2022-11-26 00:17:26,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2022-11-26 00:17:26,289 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 23 treesize of output 1 [2022-11-26 00:17:26,344 INFO L321 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2022-11-26 00:17:26,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2022-11-26 00:17:26,495 INFO L321 Elim1Store]: treesize reduction 116, result has 31.0 percent of original size [2022-11-26 00:17:26,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 61 [2022-11-26 00:17:26,522 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 00:17:26,620 INFO L321 Elim1Store]: treesize reduction 116, result has 31.0 percent of original size [2022-11-26 00:17:26,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 61 [2022-11-26 00:17:26,651 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-26 00:17:26,653 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-26 00:17:27,187 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 00:17:27,204 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 00:17:27,222 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 00:17:27,789 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 11 [2022-11-26 00:17:27,810 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 11 [2022-11-26 00:17:27,825 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 23 treesize of output 1 [2022-11-26 00:17:27,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:27,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:27,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-11-26 00:17:27,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:27,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:27,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-11-26 00:17:27,959 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 23 treesize of output 1 [2022-11-26 00:17:29,227 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 00:17:29,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:17:29,939 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-26 00:17:29,940 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 23 treesize of output 22 [2022-11-26 00:17:29,986 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-26 00:17:29,986 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 23 treesize of output 22 [2022-11-26 00:17:30,006 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 23 treesize of output 1 [2022-11-26 00:17:30,181 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 23 treesize of output 1 [2022-11-26 00:17:30,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-26 00:17:30,209 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 11 [2022-11-26 00:17:30,309 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-26 00:17:30,309 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 31 treesize of output 21 [2022-11-26 00:17:30,351 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-26 00:17:30,351 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 31 treesize of output 21 [2022-11-26 00:17:30,378 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 00:17:30,522 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-26 00:17:30,522 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 29 treesize of output 40 [2022-11-26 00:17:30,586 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-26 00:17:30,586 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 29 treesize of output 40 [2022-11-26 00:17:30,673 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-26 00:17:30,674 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 25 treesize of output 23 [2022-11-26 00:17:30,817 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 104 for LOIs [2022-11-26 00:17:30,845 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:17:48,013 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '47034#(and (<= |ULTIMATE.start_create_item_#in~cursor#1.offset| 8589934588) (<= |~#list~0.base| 3) (<= 3 |ULTIMATE.start_create_item_#in~cursor#1.base|) (<= 3 |ULTIMATE.start_create_item_~cursor#1.base|) (<= |ULTIMATE.start_main_#t~ret30#1| 2147483647) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_append_one_#in~to#1| 2147483647) (<= |ULTIMATE.start_create_item_#in~at#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_#t~ret30#1| 2147483648)) (<= |ULTIMATE.start_append_one_~to#1| 2147483647) (<= |ULTIMATE.start_main_~z~0#1| 0) (<= |ULTIMATE.start_append_one_~list#1.base| 3) (<= 0 |ULTIMATE.start_append_one_~cursor~0#1.offset|) (<= |ULTIMATE.start_append_one_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_append_one_~list#1.offset|) (<= |ULTIMATE.start_append_one_~list#1.offset| 0) (<= 3 |ULTIMATE.start_append_one_~cursor~0#1.base|) (<= |ULTIMATE.start_create_item_~cursor#1.base| 3) (<= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~y~1#1|) (<= 0 (+ 2147483648 |ULTIMATE.start_append_one_~to#1|)) (<= |ULTIMATE.start_main_~y~1#1| 4) (<= 0 |ULTIMATE.start_create_item_~cursor#1.offset|) (<= |ULTIMATE.start_append_one_~cursor~0#1.base| 3) (<= |#NULL.offset| 0) (or (not (= |ULTIMATE.start_create_item_~link~0#1.offset| 0)) (not (= |ULTIMATE.start_create_item_~link~0#1.base| 0))) (= |ULTIMATE.start_create_item_~h~0#1| 2) (<= |ULTIMATE.start_create_item_~at#1| 2147483647) (<= 0 |ULTIMATE.start_main_~length~0#1|) (<= 0 (+ |ULTIMATE.start_append_one_#in~to#1| 2147483648)) (<= 0 |ULTIMATE.start_append_one_#in~list#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_create_item_~y~0#1| 1) (<= 3 |ULTIMATE.start_append_one_~list#1.base|) (<= 0 |ULTIMATE.start_create_item_~item~0#1.offset|) (or (not (<= (+ |ULTIMATE.start_create_item_~link~0#1.offset| (* |ULTIMATE.start_create_item_~term_field~0#1| 4) 4) (select |#length| |ULTIMATE.start_create_item_~link~0#1.base|))) (not (<= 0 (+ |ULTIMATE.start_create_item_~link~0#1.offset| (* |ULTIMATE.start_create_item_~term_field~0#1| 4))))) (<= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_create_item_~at#1| 2147483648)) (<= |ULTIMATE.start_append_one_~cursor~0#1.offset| 8589934588) (<= |ULTIMATE.start_create_item_#in~cursor#1.base| 3) (<= 0 |ULTIMATE.start_create_item_#in~cursor#1.offset|) (<= 0 (+ |ULTIMATE.start_create_item_#in~at#1| 2147483648)) (<= |ULTIMATE.start_create_item_~item~0#1.offset| 0) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_create_item_~cursor#1.offset| 8589934588) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_append_one_#in~list#1.base| 3) (<= |~#list~0.offset| 0) (<= 0 |ULTIMATE.start_main_~z~0#1|) (<= 3 |ULTIMATE.start_append_one_#in~list#1.base|))' at error location [2022-11-26 00:17:48,014 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:17:48,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:17:48,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 12] total 37 [2022-11-26 00:17:48,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519318515] [2022-11-26 00:17:48,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:17:48,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-26 00:17:48,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:17:48,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-26 00:17:48,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=3505, Unknown=0, NotChecked=0, Total=3906 [2022-11-26 00:17:48,017 INFO L87 Difference]: Start difference. First operand 1021 states and 1381 transitions. Second operand has 38 states, 34 states have (on average 3.235294117647059) internal successors, (110), 35 states have internal predecessors, (110), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-26 00:18:03,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:03,885 INFO L93 Difference]: Finished difference Result 3891 states and 4919 transitions. [2022-11-26 00:18:03,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-11-26 00:18:03,886 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 34 states have (on average 3.235294117647059) internal successors, (110), 35 states have internal predecessors, (110), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 41 [2022-11-26 00:18:03,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:03,896 INFO L225 Difference]: With dead ends: 3891 [2022-11-26 00:18:03,896 INFO L226 Difference]: Without dead ends: 3891 [2022-11-26 00:18:03,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 74 SyntacticMatches, 4 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7824 ImplicationChecksByTransitivity, 28.7s TimeCoverageRelationStatistics Valid=2652, Invalid=19998, Unknown=0, NotChecked=0, Total=22650 [2022-11-26 00:18:03,903 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 4083 mSDsluCounter, 3210 mSDsCounter, 0 mSdLazyCounter, 4588 mSolverCounterSat, 427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4087 SdHoareTripleChecker+Valid, 3374 SdHoareTripleChecker+Invalid, 5015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 4588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:03,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4087 Valid, 3374 Invalid, 5015 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [427 Valid, 4588 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-11-26 00:18:03,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3891 states. [2022-11-26 00:18:03,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3891 to 1095. [2022-11-26 00:18:03,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1095 states, 981 states have (on average 1.4036697247706422) internal successors, (1377), 1025 states have internal predecessors, (1377), 57 states have call successors, (57), 28 states have call predecessors, (57), 28 states have return successors, (57), 41 states have call predecessors, (57), 57 states have call successors, (57) [2022-11-26 00:18:03,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 1491 transitions. [2022-11-26 00:18:03,954 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 1491 transitions. Word has length 41 [2022-11-26 00:18:03,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:03,955 INFO L495 AbstractCegarLoop]: Abstraction has 1095 states and 1491 transitions. [2022-11-26 00:18:03,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 34 states have (on average 3.235294117647059) internal successors, (110), 35 states have internal predecessors, (110), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-26 00:18:03,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 1491 transitions. [2022-11-26 00:18:03,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-26 00:18:03,956 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:03,956 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:03,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:18:04,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-26 00:18:04,169 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:18:04,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:04,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1655938516, now seen corresponding path program 1 times [2022-11-26 00:18:04,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:04,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224611238] [2022-11-26 00:18:04,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:04,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:18:04,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:04,283 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:18:04,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:18:04,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224611238] [2022-11-26 00:18:04,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224611238] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:18:04,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:18:04,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:18:04,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997257808] [2022-11-26 00:18:04,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:18:04,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:18:04,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:18:04,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:18:04,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:18:04,286 INFO L87 Difference]: Start difference. First operand 1095 states and 1491 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:18:04,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:04,647 INFO L93 Difference]: Finished difference Result 1644 states and 2226 transitions. [2022-11-26 00:18:04,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:18:04,648 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-11-26 00:18:04,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:04,653 INFO L225 Difference]: With dead ends: 1644 [2022-11-26 00:18:04,653 INFO L226 Difference]: Without dead ends: 1644 [2022-11-26 00:18:04,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:18:04,654 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 88 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:04,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 367 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:18:04,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2022-11-26 00:18:04,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1093. [2022-11-26 00:18:04,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1093 states, 981 states have (on average 1.3883792048929664) internal successors, (1362), 1023 states have internal predecessors, (1362), 57 states have call successors, (57), 28 states have call predecessors, (57), 28 states have return successors, (57), 41 states have call predecessors, (57), 57 states have call successors, (57) [2022-11-26 00:18:04,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1093 states to 1093 states and 1476 transitions. [2022-11-26 00:18:04,681 INFO L78 Accepts]: Start accepts. Automaton has 1093 states and 1476 transitions. Word has length 41 [2022-11-26 00:18:04,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:04,681 INFO L495 AbstractCegarLoop]: Abstraction has 1093 states and 1476 transitions. [2022-11-26 00:18:04,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:18:04,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1093 states and 1476 transitions. [2022-11-26 00:18:04,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-26 00:18:04,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:04,683 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:04,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-11-26 00:18:04,683 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:18:04,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:04,684 INFO L85 PathProgramCache]: Analyzing trace with hash 299704838, now seen corresponding path program 1 times [2022-11-26 00:18:04,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:04,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393425957] [2022-11-26 00:18:04,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:04,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:18:04,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:09,587 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:18:09,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:18:09,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393425957] [2022-11-26 00:18:09,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393425957] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:18:09,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723702425] [2022-11-26 00:18:09,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:09,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:18:09,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:18:09,589 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:18:09,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_270b0148-ae67-4bf7-8ff5-bced7f5a10e1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:18:09,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:09,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 145 conjunts are in the unsatisfiable core [2022-11-26 00:18:09,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:18:10,042 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:18:10,043 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 00:18:10,257 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 15 treesize of output 11 [2022-11-26 00:18:10,284 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 15 treesize of output 11 [2022-11-26 00:18:10,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:18:10,487 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 27 treesize of output 26 [2022-11-26 00:18:10,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:18:10,506 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 27 treesize of output 26 [2022-11-26 00:18:10,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:18:10,605 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 25 treesize of output 24 [2022-11-26 00:18:10,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:18:10,616 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 25 treesize of output 24 [2022-11-26 00:18:10,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:18:10,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-26 00:18:10,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:18:10,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-26 00:18:11,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:18:11,104 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 25 treesize of output 24 [2022-11-26 00:18:11,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:18:11,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:18:11,113 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 50 treesize of output 52 [2022-11-26 00:18:11,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:18:11,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:18:11,317 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-26 00:18:11,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 60 [2022-11-26 00:18:11,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:18:11,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:18:11,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 66 [2022-11-26 00:18:12,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:18:12,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:18:12,269 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:18:12,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 77 [2022-11-26 00:18:12,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:18:12,283 INFO L321 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2022-11-26 00:18:12,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 33 [2022-11-26 00:18:12,288 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:12,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:18:21,960 INFO L321 Elim1Store]: treesize reduction 62, result has 47.9 percent of original size [2022-11-26 00:18:21,960 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 3 case distinctions, treesize of input 246 treesize of output 255 [2022-11-26 00:18:22,074 INFO L321 Elim1Store]: treesize reduction 62, result has 47.9 percent of original size [2022-11-26 00:18:22,074 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 3 case distinctions, treesize of input 238 treesize of output 174 [2022-11-26 00:18:22,127 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:18:22,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 780 treesize of output 792 [2022-11-26 00:18:22,661 INFO L321 Elim1Store]: treesize reduction 152, result has 68.4 percent of original size [2022-11-26 00:18:22,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 47268 treesize of output 43718 [2022-11-26 00:18:22,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:18:23,320 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:18:23,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 20 case distinctions, treesize of input 353028 treesize of output 319858 [2022-11-26 00:18:25,847 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 333818 treesize of output 329522 [2022-11-26 00:18:30,164 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 10 treesize of output 4 [2022-11-26 00:18:35,572 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:18:35,573 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 380 treesize of output 362 [2022-11-26 00:23:15,168 WARN L233 SmtUtils]: Spent 6.35s on a formula simplification. DAG size of input: 827 DAG size of output: 827 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)