./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/test-0214_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_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/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_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/test-0214_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/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_fa93f054-7b33-4ee8-9f02-7184660de625/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 8cac36e956b24d42ea840a07609fb159882a2e76b1195da25a4d4343e0b31026 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 23:30:15,469 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:30:15,472 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:30:15,518 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:30:15,519 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:30:15,520 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:30:15,521 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:30:15,523 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:30:15,525 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:30:15,526 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:30:15,531 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:30:15,535 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:30:15,536 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:30:15,541 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:30:15,544 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:30:15,548 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:30:15,550 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:30:15,552 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:30:15,554 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:30:15,561 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:30:15,562 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:30:15,565 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:30:15,567 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:30:15,568 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:30:15,579 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:30:15,580 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:30:15,580 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:30:15,582 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:30:15,583 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:30:15,584 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:30:15,584 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:30:15,585 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:30:15,587 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:30:15,588 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:30:15,590 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:30:15,591 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:30:15,592 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:30:15,593 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:30:15,593 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:30:15,595 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:30:15,596 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:30:15,596 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-25 23:30:15,642 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:30:15,642 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:30:15,643 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:30:15,643 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:30:15,644 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:30:15,644 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:30:15,644 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:30:15,644 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:30:15,645 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:30:15,645 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:30:15,646 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:30:15,646 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:30:15,646 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:30:15,646 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:30:15,647 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:30:15,647 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:30:15,647 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:30:15,647 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:30:15,648 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 23:30:15,648 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 23:30:15,649 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:30:15,649 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:30:15,649 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 23:30:15,649 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:30:15,650 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:30:15,650 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:30:15,650 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 23:30:15,651 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 23:30:15,651 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 23:30:15,651 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:30:15,652 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 23:30:15,652 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:30:15,652 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:30:15,652 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:30:15,652 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:30:15,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:30:15,653 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:30:15,653 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:30:15,653 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:30:15,653 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:30:15,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:30:15,654 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:30:15,654 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_fa93f054-7b33-4ee8-9f02-7184660de625/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8cac36e956b24d42ea840a07609fb159882a2e76b1195da25a4d4343e0b31026 [2022-11-25 23:30:15,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:30:16,020 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:30:16,022 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:30:16,024 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:30:16,024 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:30:16,026 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/list-ext-properties/test-0214_1.i [2022-11-25 23:30:19,025 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:30:19,321 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:30:19,327 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/sv-benchmarks/c/list-ext-properties/test-0214_1.i [2022-11-25 23:30:19,353 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/data/634e63379/4877af49a8004110811d980bdafada49/FLAG945d84977 [2022-11-25 23:30:19,374 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/data/634e63379/4877af49a8004110811d980bdafada49 [2022-11-25 23:30:19,377 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:30:19,379 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:30:19,382 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:30:19,383 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:30:19,411 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:30:19,413 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:30:19" (1/1) ... [2022-11-25 23:30:19,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e1d0272 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:19, skipping insertion in model container [2022-11-25 23:30:19,414 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:30:19" (1/1) ... [2022-11-25 23:30:19,424 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:30:19,497 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:30:19,953 WARN L623 FunctionHandler]: Unknown extern function abort [2022-11-25 23:30:20,002 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:30:20,017 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:30:20,071 WARN L623 FunctionHandler]: Unknown extern function abort [2022-11-25 23:30:20,086 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:30:20,123 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:30:20,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:20 WrapperNode [2022-11-25 23:30:20,124 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:30:20,126 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:30:20,126 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:30:20,126 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:30:20,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:20" (1/1) ... [2022-11-25 23:30:20,164 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:20" (1/1) ... [2022-11-25 23:30:20,217 INFO L138 Inliner]: procedures = 181, calls = 43, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 215 [2022-11-25 23:30:20,218 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:30:20,218 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:30:20,218 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:30:20,218 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:30:20,228 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:20" (1/1) ... [2022-11-25 23:30:20,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:20" (1/1) ... [2022-11-25 23:30:20,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:20" (1/1) ... [2022-11-25 23:30:20,233 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:20" (1/1) ... [2022-11-25 23:30:20,242 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:20" (1/1) ... [2022-11-25 23:30:20,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:20" (1/1) ... [2022-11-25 23:30:20,259 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:20" (1/1) ... [2022-11-25 23:30:20,260 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:20" (1/1) ... [2022-11-25 23:30:20,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:30:20,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:30:20,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:30:20,265 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:30:20,266 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:20" (1/1) ... [2022-11-25 23:30:20,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:30:20,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:30:20,300 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:30:20,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:30:20,358 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2022-11-25 23:30:20,358 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2022-11-25 23:30:20,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 23:30:20,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 23:30:20,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:30:20,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 23:30:20,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 23:30:20,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 23:30:20,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-25 23:30:20,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:30:20,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:30:20,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:30:20,544 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:30:20,546 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:30:21,108 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:30:21,254 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:30:21,254 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-25 23:30:21,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:30:21 BoogieIcfgContainer [2022-11-25 23:30:21,257 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:30:21,259 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:30:21,259 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:30:21,263 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:30:21,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:30:19" (1/3) ... [2022-11-25 23:30:21,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6afe9934 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:30:21, skipping insertion in model container [2022-11-25 23:30:21,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:20" (2/3) ... [2022-11-25 23:30:21,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6afe9934 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:30:21, skipping insertion in model container [2022-11-25 23:30:21,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:30:21" (3/3) ... [2022-11-25 23:30:21,266 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0214_1.i [2022-11-25 23:30:21,284 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:30:21,285 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 57 error locations. [2022-11-25 23:30:21,343 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:30:21,351 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;@3e8e478e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:30:21,352 INFO L358 AbstractCegarLoop]: Starting to check reachability of 57 error locations. [2022-11-25 23:30:21,358 INFO L276 IsEmpty]: Start isEmpty. Operand has 123 states, 62 states have (on average 2.161290322580645) internal successors, (134), 119 states have internal predecessors, (134), 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) [2022-11-25 23:30:21,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-25 23:30:21,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:21,366 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-25 23:30:21,366 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:30:21,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:21,371 INFO L85 PathProgramCache]: Analyzing trace with hash 9494517, now seen corresponding path program 1 times [2022-11-25 23:30:21,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:21,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901249742] [2022-11-25 23:30:21,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:21,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:21,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:21,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:30:21,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:21,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901249742] [2022-11-25 23:30:21,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901249742] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:30:21,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:30:21,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:30:21,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642208451] [2022-11-25 23:30:21,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:30:21,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 23:30:21,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:30:21,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 23:30:21,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 23:30:21,604 INFO L87 Difference]: Start difference. First operand has 123 states, 62 states have (on average 2.161290322580645) internal successors, (134), 119 states have internal predecessors, (134), 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) [2022-11-25 23:30:21,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:30:21,711 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2022-11-25 23:30:21,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 23:30:21,714 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 [2022-11-25 23:30:21,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:30:21,722 INFO L225 Difference]: With dead ends: 123 [2022-11-25 23:30:21,722 INFO L226 Difference]: Without dead ends: 121 [2022-11-25 23:30:21,724 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 [2022-11-25 23:30:21,730 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:30:21,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 114 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:30:21,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-25 23:30:21,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-11-25 23:30:21,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 61 states have (on average 2.098360655737705) internal successors, (128), 117 states have internal predecessors, (128), 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) [2022-11-25 23:30:21,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 132 transitions. [2022-11-25 23:30:21,791 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 132 transitions. Word has length 4 [2022-11-25 23:30:21,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:30:21,792 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 132 transitions. [2022-11-25 23:30:21,792 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) [2022-11-25 23:30:21,792 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 132 transitions. [2022-11-25 23:30:21,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-25 23:30:21,793 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:21,793 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 23:30:21,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:30:21,794 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:30:21,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:21,795 INFO L85 PathProgramCache]: Analyzing trace with hash 295854258, now seen corresponding path program 1 times [2022-11-25 23:30:21,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:21,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419252653] [2022-11-25 23:30:21,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:21,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:21,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:22,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:30:22,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:22,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419252653] [2022-11-25 23:30:22,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419252653] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:30:22,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:30:22,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:30:22,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457067210] [2022-11-25 23:30:22,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:30:22,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:30:22,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:30:22,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:30:22,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:30:22,123 INFO L87 Difference]: Start difference. First operand 121 states and 132 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) [2022-11-25 23:30:22,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:30:22,406 INFO L93 Difference]: Finished difference Result 207 states and 226 transitions. [2022-11-25 23:30:22,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:30:22,407 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 [2022-11-25 23:30:22,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:30:22,408 INFO L225 Difference]: With dead ends: 207 [2022-11-25 23:30:22,408 INFO L226 Difference]: Without dead ends: 207 [2022-11-25 23:30:22,409 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 [2022-11-25 23:30:22,410 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 105 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:30:22,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 236 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:30:22,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-11-25 23:30:22,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 161. [2022-11-25 23:30:22,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 98 states have (on average 2.061224489795918) internal successors, (202), 155 states have internal predecessors, (202), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 23:30:22,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 210 transitions. [2022-11-25 23:30:22,424 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 210 transitions. Word has length 5 [2022-11-25 23:30:22,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:30:22,424 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 210 transitions. [2022-11-25 23:30:22,424 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) [2022-11-25 23:30:22,424 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 210 transitions. [2022-11-25 23:30:22,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-25 23:30:22,425 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:22,425 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 23:30:22,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 23:30:22,426 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:30:22,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:22,426 INFO L85 PathProgramCache]: Analyzing trace with hash 295854257, now seen corresponding path program 1 times [2022-11-25 23:30:22,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:22,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239585623] [2022-11-25 23:30:22,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:22,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:22,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:22,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:30:22,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:22,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239585623] [2022-11-25 23:30:22,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239585623] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:30:22,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:30:22,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 23:30:22,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477541377] [2022-11-25 23:30:22,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:30:22,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:30:22,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:30:22,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:30:22,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:30:22,519 INFO L87 Difference]: Start difference. First operand 161 states and 210 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) [2022-11-25 23:30:22,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:30:22,775 INFO L93 Difference]: Finished difference Result 312 states and 405 transitions. [2022-11-25 23:30:22,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:30:22,776 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 [2022-11-25 23:30:22,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:30:22,780 INFO L225 Difference]: With dead ends: 312 [2022-11-25 23:30:22,780 INFO L226 Difference]: Without dead ends: 312 [2022-11-25 23:30:22,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:30:22,781 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 116 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:30:22,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 132 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:30:22,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-11-25 23:30:22,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 218. [2022-11-25 23:30:22,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 149 states have (on average 1.9798657718120805) internal successors, (295), 207 states have internal predecessors, (295), 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) [2022-11-25 23:30:22,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 311 transitions. [2022-11-25 23:30:22,799 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 311 transitions. Word has length 5 [2022-11-25 23:30:22,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:30:22,800 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 311 transitions. [2022-11-25 23:30:22,800 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) [2022-11-25 23:30:22,800 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 311 transitions. [2022-11-25 23:30:22,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 23:30:22,801 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:22,801 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:30:22,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 23:30:22,802 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:30:22,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:22,802 INFO L85 PathProgramCache]: Analyzing trace with hash 848151012, now seen corresponding path program 1 times [2022-11-25 23:30:22,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:22,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302278653] [2022-11-25 23:30:22,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:22,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:22,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:22,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:30:22,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:22,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302278653] [2022-11-25 23:30:22,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302278653] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:30:22,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:30:22,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 23:30:22,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622478948] [2022-11-25 23:30:22,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:30:22,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:30:22,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:30:22,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:30:22,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:30:22,843 INFO L87 Difference]: Start difference. First operand 218 states and 311 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) [2022-11-25 23:30:23,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:30:23,002 INFO L93 Difference]: Finished difference Result 277 states and 367 transitions. [2022-11-25 23:30:23,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:30:23,003 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 [2022-11-25 23:30:23,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:30:23,005 INFO L225 Difference]: With dead ends: 277 [2022-11-25 23:30:23,005 INFO L226 Difference]: Without dead ends: 276 [2022-11-25 23:30:23,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:30:23,017 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 71 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:30:23,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 154 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:30:23,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-11-25 23:30:23,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 219. [2022-11-25 23:30:23,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 150 states have (on average 1.9733333333333334) internal successors, (296), 208 states have internal predecessors, (296), 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) [2022-11-25 23:30:23,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 312 transitions. [2022-11-25 23:30:23,038 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 312 transitions. Word has length 7 [2022-11-25 23:30:23,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:30:23,039 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 312 transitions. [2022-11-25 23:30:23,039 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) [2022-11-25 23:30:23,039 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 312 transitions. [2022-11-25 23:30:23,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 23:30:23,040 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:23,040 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:30:23,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 23:30:23,041 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:30:23,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:23,042 INFO L85 PathProgramCache]: Analyzing trace with hash 848149727, now seen corresponding path program 1 times [2022-11-25 23:30:23,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:23,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420669875] [2022-11-25 23:30:23,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:23,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:23,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:23,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:30:23,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:23,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420669875] [2022-11-25 23:30:23,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420669875] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:30:23,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:30:23,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:30:23,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690189651] [2022-11-25 23:30:23,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:30:23,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:30:23,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:30:23,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:30:23,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:30:23,136 INFO L87 Difference]: Start difference. First operand 219 states and 312 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) [2022-11-25 23:30:23,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:30:23,208 INFO L93 Difference]: Finished difference Result 306 states and 393 transitions. [2022-11-25 23:30:23,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:30:23,210 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 [2022-11-25 23:30:23,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:30:23,212 INFO L225 Difference]: With dead ends: 306 [2022-11-25 23:30:23,212 INFO L226 Difference]: Without dead ends: 303 [2022-11-25 23:30:23,214 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 [2022-11-25 23:30:23,217 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 109 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:30:23,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 223 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:30:23,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-11-25 23:30:23,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 217. [2022-11-25 23:30:23,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 148 states have (on average 1.9797297297297298) internal successors, (293), 206 states have internal predecessors, (293), 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) [2022-11-25 23:30:23,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 309 transitions. [2022-11-25 23:30:23,251 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 309 transitions. Word has length 7 [2022-11-25 23:30:23,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:30:23,251 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 309 transitions. [2022-11-25 23:30:23,252 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) [2022-11-25 23:30:23,252 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 309 transitions. [2022-11-25 23:30:23,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 23:30:23,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:23,253 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:30:23,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 23:30:23,253 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:30:23,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:23,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1496074725, now seen corresponding path program 1 times [2022-11-25 23:30:23,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:23,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614133535] [2022-11-25 23:30:23,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:23,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:23,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:23,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:30:23,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:23,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614133535] [2022-11-25 23:30:23,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614133535] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:30:23,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:30:23,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:30:23,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599943021] [2022-11-25 23:30:23,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:30:23,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:30:23,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:30:23,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:30:23,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:30:23,387 INFO L87 Difference]: Start difference. First operand 217 states and 309 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) [2022-11-25 23:30:23,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:30:23,711 INFO L93 Difference]: Finished difference Result 333 states and 398 transitions. [2022-11-25 23:30:23,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:30:23,712 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 [2022-11-25 23:30:23,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:30:23,713 INFO L225 Difference]: With dead ends: 333 [2022-11-25 23:30:23,714 INFO L226 Difference]: Without dead ends: 333 [2022-11-25 23:30:23,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:30:23,715 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 216 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:30:23,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 223 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:30:23,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-11-25 23:30:23,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 217. [2022-11-25 23:30:23,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 148 states have (on average 1.9391891891891893) internal successors, (287), 206 states have internal predecessors, (287), 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) [2022-11-25 23:30:23,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 303 transitions. [2022-11-25 23:30:23,725 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 303 transitions. Word has length 10 [2022-11-25 23:30:23,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:30:23,725 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 303 transitions. [2022-11-25 23:30:23,725 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) [2022-11-25 23:30:23,726 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 303 transitions. [2022-11-25 23:30:23,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 23:30:23,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:23,726 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:30:23,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 23:30:23,727 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:30:23,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:23,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1496074726, now seen corresponding path program 1 times [2022-11-25 23:30:23,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:23,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979974089] [2022-11-25 23:30:23,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:23,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:23,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:24,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:30:24,014 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:24,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979974089] [2022-11-25 23:30:24,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979974089] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:30:24,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:30:24,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 23:30:24,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743664915] [2022-11-25 23:30:24,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:30:24,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:30:24,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:30:24,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:30:24,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:30:24,017 INFO L87 Difference]: Start difference. First operand 217 states and 303 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) [2022-11-25 23:30:24,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:30:24,550 INFO L93 Difference]: Finished difference Result 402 states and 496 transitions. [2022-11-25 23:30:24,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 23:30:24,550 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 [2022-11-25 23:30:24,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:30:24,552 INFO L225 Difference]: With dead ends: 402 [2022-11-25 23:30:24,552 INFO L226 Difference]: Without dead ends: 402 [2022-11-25 23:30:24,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:30:24,553 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 200 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:30:24,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 506 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:30:24,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-11-25 23:30:24,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 237. [2022-11-25 23:30:24,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 168 states have (on average 1.9464285714285714) internal successors, (327), 224 states have internal predecessors, (327), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 23:30:24,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 343 transitions. [2022-11-25 23:30:24,564 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 343 transitions. Word has length 10 [2022-11-25 23:30:24,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:30:24,565 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 343 transitions. [2022-11-25 23:30:24,565 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) [2022-11-25 23:30:24,565 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 343 transitions. [2022-11-25 23:30:24,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 23:30:24,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:24,566 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:30:24,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 23:30:24,566 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:30:24,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:24,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1502673227, now seen corresponding path program 1 times [2022-11-25 23:30:24,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:24,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492750231] [2022-11-25 23:30:24,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:24,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:24,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:24,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:30:24,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:24,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492750231] [2022-11-25 23:30:24,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492750231] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:30:24,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:30:24,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:30:24,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878382704] [2022-11-25 23:30:24,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:30:24,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:30:24,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:30:24,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:30:24,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:30:24,631 INFO L87 Difference]: Start difference. First operand 237 states and 343 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) [2022-11-25 23:30:24,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:30:24,924 INFO L93 Difference]: Finished difference Result 398 states and 528 transitions. [2022-11-25 23:30:24,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:30:24,925 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 [2022-11-25 23:30:24,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:30:24,927 INFO L225 Difference]: With dead ends: 398 [2022-11-25 23:30:24,927 INFO L226 Difference]: Without dead ends: 398 [2022-11-25 23:30:24,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:30:24,928 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 208 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:30:24,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 226 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:30:24,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-11-25 23:30:24,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 243. [2022-11-25 23:30:24,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 174 states have (on average 1.9137931034482758) internal successors, (333), 230 states have internal predecessors, (333), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 23:30:24,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 349 transitions. [2022-11-25 23:30:24,939 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 349 transitions. Word has length 12 [2022-11-25 23:30:24,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:30:24,939 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 349 transitions. [2022-11-25 23:30:24,940 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) [2022-11-25 23:30:24,940 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 349 transitions. [2022-11-25 23:30:24,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 23:30:24,941 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:24,941 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:30:24,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 23:30:24,942 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:30:24,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:24,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1502673226, now seen corresponding path program 1 times [2022-11-25 23:30:24,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:24,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593831859] [2022-11-25 23:30:24,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:24,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:24,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:25,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:30:25,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:25,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593831859] [2022-11-25 23:30:25,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593831859] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:30:25,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:30:25,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:30:25,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016902101] [2022-11-25 23:30:25,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:30:25,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:30:25,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:30:25,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:30:25,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:30:25,087 INFO L87 Difference]: Start difference. First operand 243 states and 349 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) [2022-11-25 23:30:25,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:30:25,325 INFO L93 Difference]: Finished difference Result 285 states and 360 transitions. [2022-11-25 23:30:25,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:30:25,326 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 [2022-11-25 23:30:25,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:30:25,327 INFO L225 Difference]: With dead ends: 285 [2022-11-25 23:30:25,327 INFO L226 Difference]: Without dead ends: 285 [2022-11-25 23:30:25,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:30:25,328 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 146 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:30:25,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 237 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:30:25,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-11-25 23:30:25,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 243. [2022-11-25 23:30:25,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 174 states have (on average 1.8793103448275863) internal successors, (327), 230 states have internal predecessors, (327), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 23:30:25,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 343 transitions. [2022-11-25 23:30:25,340 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 343 transitions. Word has length 12 [2022-11-25 23:30:25,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:30:25,341 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 343 transitions. [2022-11-25 23:30:25,341 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) [2022-11-25 23:30:25,341 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 343 transitions. [2022-11-25 23:30:25,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 23:30:25,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:25,342 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:30:25,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 23:30:25,342 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:30:25,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:25,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1085998047, now seen corresponding path program 1 times [2022-11-25 23:30:25,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:25,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434034724] [2022-11-25 23:30:25,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:25,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:25,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:25,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:30:25,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:25,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434034724] [2022-11-25 23:30:25,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434034724] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:30:25,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:30:25,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:30:25,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538489102] [2022-11-25 23:30:25,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:30:25,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:30:25,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:30:25,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:30:25,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:30:25,385 INFO L87 Difference]: Start difference. First operand 243 states and 343 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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) [2022-11-25 23:30:25,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:30:25,542 INFO L93 Difference]: Finished difference Result 320 states and 419 transitions. [2022-11-25 23:30:25,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:30:25,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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 [2022-11-25 23:30:25,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:30:25,544 INFO L225 Difference]: With dead ends: 320 [2022-11-25 23:30:25,544 INFO L226 Difference]: Without dead ends: 320 [2022-11-25 23:30:25,544 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 [2022-11-25 23:30:25,545 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 111 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:30:25,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 174 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:30:25,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-11-25 23:30:25,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 240. [2022-11-25 23:30:25,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 174 states have (on average 1.8103448275862069) internal successors, (315), 227 states have internal predecessors, (315), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 23:30:25,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 331 transitions. [2022-11-25 23:30:25,553 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 331 transitions. Word has length 12 [2022-11-25 23:30:25,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:30:25,553 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 331 transitions. [2022-11-25 23:30:25,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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) [2022-11-25 23:30:25,553 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 331 transitions. [2022-11-25 23:30:25,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 23:30:25,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:25,554 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:30:25,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 23:30:25,554 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:30:25,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:25,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1085998046, now seen corresponding path program 1 times [2022-11-25 23:30:25,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:25,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215220128] [2022-11-25 23:30:25,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:25,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:25,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:25,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:30:25,744 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:25,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215220128] [2022-11-25 23:30:25,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215220128] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:30:25,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:30:25,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 23:30:25,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241272581] [2022-11-25 23:30:25,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:30:25,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:30:25,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:30:25,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:30:25,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:30:25,746 INFO L87 Difference]: Start difference. First operand 240 states and 331 transitions. Second operand has 7 states, 5 states have (on average 2.0) internal successors, (10), 6 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) [2022-11-25 23:30:26,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:30:26,041 INFO L93 Difference]: Finished difference Result 268 states and 324 transitions. [2022-11-25 23:30:26,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 23:30:26,041 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.0) internal successors, (10), 6 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 [2022-11-25 23:30:26,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:30:26,043 INFO L225 Difference]: With dead ends: 268 [2022-11-25 23:30:26,043 INFO L226 Difference]: Without dead ends: 268 [2022-11-25 23:30:26,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-25 23:30:26,044 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 393 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:30:26,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 527 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:30:26,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-11-25 23:30:26,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 238. [2022-11-25 23:30:26,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 174 states have (on average 1.764367816091954) internal successors, (307), 225 states have internal predecessors, (307), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 23:30:26,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 323 transitions. [2022-11-25 23:30:26,051 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 323 transitions. Word has length 12 [2022-11-25 23:30:26,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:30:26,051 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 323 transitions. [2022-11-25 23:30:26,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.0) internal successors, (10), 6 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) [2022-11-25 23:30:26,051 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 323 transitions. [2022-11-25 23:30:26,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 23:30:26,052 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:26,052 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:30:26,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 23:30:26,052 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:30:26,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:26,053 INFO L85 PathProgramCache]: Analyzing trace with hash 693798951, now seen corresponding path program 1 times [2022-11-25 23:30:26,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:26,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725023447] [2022-11-25 23:30:26,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:26,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:26,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:30:26,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:26,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725023447] [2022-11-25 23:30:26,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725023447] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:30:26,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:30:26,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 23:30:26,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382543712] [2022-11-25 23:30:26,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:30:26,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:30:26,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:30:26,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:30:26,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:30:26,284 INFO L87 Difference]: Start difference. First operand 238 states and 323 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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) [2022-11-25 23:30:26,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:30:26,650 INFO L93 Difference]: Finished difference Result 267 states and 320 transitions. [2022-11-25 23:30:26,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 23:30:26,651 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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 [2022-11-25 23:30:26,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:30:26,652 INFO L225 Difference]: With dead ends: 267 [2022-11-25 23:30:26,652 INFO L226 Difference]: Without dead ends: 267 [2022-11-25 23:30:26,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:30:26,653 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 512 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:30:26,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 505 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:30:26,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-11-25 23:30:26,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 237. [2022-11-25 23:30:26,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 174 states have (on average 1.7413793103448276) internal successors, (303), 224 states have internal predecessors, (303), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 23:30:26,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 319 transitions. [2022-11-25 23:30:26,660 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 319 transitions. Word has length 13 [2022-11-25 23:30:26,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:30:26,660 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 319 transitions. [2022-11-25 23:30:26,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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) [2022-11-25 23:30:26,660 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 319 transitions. [2022-11-25 23:30:26,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-25 23:30:26,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:26,661 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:30:26,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 23:30:26,662 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:30:26,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:26,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1038357882, now seen corresponding path program 1 times [2022-11-25 23:30:26,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:26,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647072386] [2022-11-25 23:30:26,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:26,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:26,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:27,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:30:27,014 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:27,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647072386] [2022-11-25 23:30:27,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647072386] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:30:27,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:30:27,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 23:30:27,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392897753] [2022-11-25 23:30:27,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:30:27,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:30:27,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:30:27,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:30:27,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:30:27,016 INFO L87 Difference]: Start difference. First operand 237 states and 319 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) [2022-11-25 23:30:27,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:30:27,524 INFO L93 Difference]: Finished difference Result 327 states and 422 transitions. [2022-11-25 23:30:27,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 23:30:27,525 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 [2022-11-25 23:30:27,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:30:27,526 INFO L225 Difference]: With dead ends: 327 [2022-11-25 23:30:27,526 INFO L226 Difference]: Without dead ends: 325 [2022-11-25 23:30:27,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-11-25 23:30:27,527 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 192 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:30:27,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 366 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:30:27,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-11-25 23:30:27,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 276. [2022-11-25 23:30:27,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 208 states have (on average 1.7163461538461537) internal successors, (357), 259 states have internal predecessors, (357), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-25 23:30:27,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 379 transitions. [2022-11-25 23:30:27,536 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 379 transitions. Word has length 16 [2022-11-25 23:30:27,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:30:27,536 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 379 transitions. [2022-11-25 23:30:27,536 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) [2022-11-25 23:30:27,537 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 379 transitions. [2022-11-25 23:30:27,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-25 23:30:27,537 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:27,537 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:30:27,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 23:30:27,538 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:30:27,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:27,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1582127119, now seen corresponding path program 1 times [2022-11-25 23:30:27,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:27,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283374455] [2022-11-25 23:30:27,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:27,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:27,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:27,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:30:27,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:27,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283374455] [2022-11-25 23:30:27,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283374455] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:30:27,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:30:27,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 23:30:27,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002776929] [2022-11-25 23:30:27,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:30:27,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:30:27,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:30:27,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:30:27,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:30:27,803 INFO L87 Difference]: Start difference. First operand 276 states and 379 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) 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) [2022-11-25 23:30:28,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:30:28,206 INFO L93 Difference]: Finished difference Result 485 states and 624 transitions. [2022-11-25 23:30:28,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 23:30:28,208 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) 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 [2022-11-25 23:30:28,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:30:28,210 INFO L225 Difference]: With dead ends: 485 [2022-11-25 23:30:28,211 INFO L226 Difference]: Without dead ends: 485 [2022-11-25 23:30:28,211 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 [2022-11-25 23:30:28,211 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 180 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:30:28,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 832 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:30:28,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-11-25 23:30:28,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 313. [2022-11-25 23:30:28,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 242 states have (on average 1.6983471074380165) internal successors, (411), 293 states have internal predecessors, (411), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-25 23:30:28,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 437 transitions. [2022-11-25 23:30:28,223 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 437 transitions. Word has length 16 [2022-11-25 23:30:28,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:30:28,224 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 437 transitions. [2022-11-25 23:30:28,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) 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) [2022-11-25 23:30:28,224 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 437 transitions. [2022-11-25 23:30:28,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-25 23:30:28,225 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:28,225 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:30:28,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 23:30:28,225 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:30:28,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:28,226 INFO L85 PathProgramCache]: Analyzing trace with hash 2124685205, now seen corresponding path program 1 times [2022-11-25 23:30:28,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:28,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958727730] [2022-11-25 23:30:28,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:28,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:28,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:28,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:30:28,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:28,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958727730] [2022-11-25 23:30:28,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958727730] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:30:28,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:30:28,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:30:28,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862002400] [2022-11-25 23:30:28,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:30:28,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:30:28,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:30:28,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:30:28,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:30:28,319 INFO L87 Difference]: Start difference. First operand 313 states and 437 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) [2022-11-25 23:30:28,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:30:28,601 INFO L93 Difference]: Finished difference Result 461 states and 610 transitions. [2022-11-25 23:30:28,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:30:28,602 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 [2022-11-25 23:30:28,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:30:28,604 INFO L225 Difference]: With dead ends: 461 [2022-11-25 23:30:28,604 INFO L226 Difference]: Without dead ends: 461 [2022-11-25 23:30:28,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:30:28,605 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 181 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:30:28,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 222 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:30:28,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-11-25 23:30:28,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 333. [2022-11-25 23:30:28,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 262 states have (on average 1.7366412213740459) internal successors, (455), 313 states have internal predecessors, (455), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-25 23:30:28,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 481 transitions. [2022-11-25 23:30:28,620 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 481 transitions. Word has length 17 [2022-11-25 23:30:28,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:30:28,620 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 481 transitions. [2022-11-25 23:30:28,620 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) [2022-11-25 23:30:28,620 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 481 transitions. [2022-11-25 23:30:28,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-25 23:30:28,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:28,621 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:30:28,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 23:30:28,622 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:30:28,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:28,622 INFO L85 PathProgramCache]: Analyzing trace with hash 2124685206, now seen corresponding path program 1 times [2022-11-25 23:30:28,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:28,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150252672] [2022-11-25 23:30:28,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:28,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:28,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:28,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:30:28,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:28,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150252672] [2022-11-25 23:30:28,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150252672] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:30:28,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:30:28,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:30:28,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764871354] [2022-11-25 23:30:28,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:30:28,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:30:28,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:30:28,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:30:28,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:30:28,800 INFO L87 Difference]: Start difference. First operand 333 states and 481 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) [2022-11-25 23:30:29,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:30:29,083 INFO L93 Difference]: Finished difference Result 376 states and 489 transitions. [2022-11-25 23:30:29,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:30:29,084 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 [2022-11-25 23:30:29,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:30:29,086 INFO L225 Difference]: With dead ends: 376 [2022-11-25 23:30:29,086 INFO L226 Difference]: Without dead ends: 376 [2022-11-25 23:30:29,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:30:29,087 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 139 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:30:29,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 291 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:30:29,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-11-25 23:30:29,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 333. [2022-11-25 23:30:29,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 262 states have (on average 1.6793893129770991) internal successors, (440), 313 states have internal predecessors, (440), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-25 23:30:29,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 466 transitions. [2022-11-25 23:30:29,095 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 466 transitions. Word has length 17 [2022-11-25 23:30:29,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:30:29,095 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 466 transitions. [2022-11-25 23:30:29,096 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) [2022-11-25 23:30:29,096 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 466 transitions. [2022-11-25 23:30:29,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-25 23:30:29,096 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:29,096 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:30:29,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-25 23:30:29,097 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:30:29,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:29,097 INFO L85 PathProgramCache]: Analyzing trace with hash 6077746, now seen corresponding path program 1 times [2022-11-25 23:30:29,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:29,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858691984] [2022-11-25 23:30:29,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:29,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:29,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:30:29,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:29,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858691984] [2022-11-25 23:30:29,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858691984] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:30:29,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:30:29,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:30:29,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465593296] [2022-11-25 23:30:29,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:30:29,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:30:29,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:30:29,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:30:29,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:30:29,316 INFO L87 Difference]: Start difference. First operand 333 states and 466 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 23:30:29,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:30:29,481 INFO L93 Difference]: Finished difference Result 355 states and 459 transitions. [2022-11-25 23:30:29,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:30:29,482 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-11-25 23:30:29,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:30:29,484 INFO L225 Difference]: With dead ends: 355 [2022-11-25 23:30:29,484 INFO L226 Difference]: Without dead ends: 355 [2022-11-25 23:30:29,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:30:29,484 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 342 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:30:29,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 150 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:30:29,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-11-25 23:30:29,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 329. [2022-11-25 23:30:29,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 262 states have (on average 1.6488549618320612) internal successors, (432), 309 states have internal predecessors, (432), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-25 23:30:29,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 458 transitions. [2022-11-25 23:30:29,493 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 458 transitions. Word has length 18 [2022-11-25 23:30:29,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:30:29,493 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 458 transitions. [2022-11-25 23:30:29,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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) [2022-11-25 23:30:29,493 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 458 transitions. [2022-11-25 23:30:29,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-25 23:30:29,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:29,494 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] [2022-11-25 23:30:29,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 23:30:29,494 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:30:29,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:29,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1564037942, now seen corresponding path program 1 times [2022-11-25 23:30:29,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:29,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333921001] [2022-11-25 23:30:29,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:29,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:29,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:29,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:30:29,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:29,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333921001] [2022-11-25 23:30:29,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333921001] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:30:29,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:30:29,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 23:30:29,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015073040] [2022-11-25 23:30:29,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:30:29,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:30:29,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:30:29,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:30:29,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:30:29,662 INFO L87 Difference]: Start difference. First operand 329 states and 458 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) [2022-11-25 23:30:30,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:30:30,047 INFO L93 Difference]: Finished difference Result 460 states and 616 transitions. [2022-11-25 23:30:30,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 23:30:30,047 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 [2022-11-25 23:30:30,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:30:30,049 INFO L225 Difference]: With dead ends: 460 [2022-11-25 23:30:30,049 INFO L226 Difference]: Without dead ends: 460 [2022-11-25 23:30:30,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:30:30,050 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 356 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:30:30,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 551 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:30:30,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-11-25 23:30:30,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 326. [2022-11-25 23:30:30,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 262 states have (on average 1.6106870229007633) internal successors, (422), 306 states have internal predecessors, (422), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-25 23:30:30,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 448 transitions. [2022-11-25 23:30:30,066 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 448 transitions. Word has length 20 [2022-11-25 23:30:30,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:30:30,068 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 448 transitions. [2022-11-25 23:30:30,068 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) [2022-11-25 23:30:30,068 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 448 transitions. [2022-11-25 23:30:30,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-25 23:30:30,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:30,072 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] [2022-11-25 23:30:30,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-25 23:30:30,073 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:30:30,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:30,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1240538813, now seen corresponding path program 1 times [2022-11-25 23:30:30,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:30,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920533040] [2022-11-25 23:30:30,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:30,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:30,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:30,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:30:30,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:30,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920533040] [2022-11-25 23:30:30,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920533040] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:30:30,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:30:30,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 23:30:30,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423300974] [2022-11-25 23:30:30,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:30:30,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:30:30,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:30:30,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:30:30,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:30:30,503 INFO L87 Difference]: Start difference. First operand 326 states and 448 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) [2022-11-25 23:30:30,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:30:30,853 INFO L93 Difference]: Finished difference Result 359 states and 465 transitions. [2022-11-25 23:30:30,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:30:30,855 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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 [2022-11-25 23:30:30,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:30:30,857 INFO L225 Difference]: With dead ends: 359 [2022-11-25 23:30:30,857 INFO L226 Difference]: Without dead ends: 359 [2022-11-25 23:30:30,857 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 [2022-11-25 23:30:30,857 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 101 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:30:30,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 438 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:30:30,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-11-25 23:30:30,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 322. [2022-11-25 23:30:30,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 258 states have (on average 1.5891472868217054) internal successors, (410), 302 states have internal predecessors, (410), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-25 23:30:30,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 436 transitions. [2022-11-25 23:30:30,866 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 436 transitions. Word has length 21 [2022-11-25 23:30:30,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:30:30,866 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 436 transitions. [2022-11-25 23:30:30,866 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) [2022-11-25 23:30:30,866 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 436 transitions. [2022-11-25 23:30:30,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-25 23:30:30,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:30,867 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] [2022-11-25 23:30:30,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-25 23:30:30,867 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:30:30,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:30,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1240513244, now seen corresponding path program 1 times [2022-11-25 23:30:30,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:30,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139641483] [2022-11-25 23:30:30,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:30,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:30,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:31,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:30:31,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:31,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139641483] [2022-11-25 23:30:31,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139641483] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:30:31,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:30:31,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:30:31,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646892029] [2022-11-25 23:30:31,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:30:31,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:30:31,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:30:31,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:30:31,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:30:31,010 INFO L87 Difference]: Start difference. First operand 322 states and 436 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) [2022-11-25 23:30:31,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:30:31,222 INFO L93 Difference]: Finished difference Result 358 states and 463 transitions. [2022-11-25 23:30:31,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:30:31,222 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 [2022-11-25 23:30:31,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:30:31,224 INFO L225 Difference]: With dead ends: 358 [2022-11-25 23:30:31,224 INFO L226 Difference]: Without dead ends: 358 [2022-11-25 23:30:31,224 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 [2022-11-25 23:30:31,225 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 101 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:30:31,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 356 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:30:31,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-11-25 23:30:31,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 322. [2022-11-25 23:30:31,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 258 states have (on average 1.5813953488372092) internal successors, (408), 302 states have internal predecessors, (408), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-25 23:30:31,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 434 transitions. [2022-11-25 23:30:31,234 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 434 transitions. Word has length 21 [2022-11-25 23:30:31,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:30:31,234 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 434 transitions. [2022-11-25 23:30:31,235 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) [2022-11-25 23:30:31,235 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 434 transitions. [2022-11-25 23:30:31,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-25 23:30:31,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:31,237 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] [2022-11-25 23:30:31,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-25 23:30:31,238 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:30:31,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:31,238 INFO L85 PathProgramCache]: Analyzing trace with hash -198794891, now seen corresponding path program 1 times [2022-11-25 23:30:31,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:31,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73367282] [2022-11-25 23:30:31,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:31,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:31,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:31,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:30:31,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:31,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73367282] [2022-11-25 23:30:31,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73367282] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:30:31,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:30:31,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:30:31,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807265907] [2022-11-25 23:30:31,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:30:31,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:30:31,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:30:31,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:30:31,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:30:31,430 INFO L87 Difference]: Start difference. First operand 322 states and 434 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) [2022-11-25 23:30:31,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:30:31,672 INFO L93 Difference]: Finished difference Result 402 states and 523 transitions. [2022-11-25 23:30:31,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:30:31,672 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 [2022-11-25 23:30:31,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:30:31,674 INFO L225 Difference]: With dead ends: 402 [2022-11-25 23:30:31,674 INFO L226 Difference]: Without dead ends: 402 [2022-11-25 23:30:31,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:30:31,675 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 112 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:30:31,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 306 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:30:31,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-11-25 23:30:31,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 353. [2022-11-25 23:30:31,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 286 states have (on average 1.56993006993007) internal successors, (449), 331 states have internal predecessors, (449), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-25 23:30:31,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 479 transitions. [2022-11-25 23:30:31,684 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 479 transitions. Word has length 22 [2022-11-25 23:30:31,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:30:31,684 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 479 transitions. [2022-11-25 23:30:31,685 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) [2022-11-25 23:30:31,685 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 479 transitions. [2022-11-25 23:30:31,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-25 23:30:31,685 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:31,685 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:30:31,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-25 23:30:31,686 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:30:31,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:31,686 INFO L85 PathProgramCache]: Analyzing trace with hash 544205615, now seen corresponding path program 1 times [2022-11-25 23:30:31,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:31,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426247134] [2022-11-25 23:30:31,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:31,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:31,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:32,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:30:32,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:32,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426247134] [2022-11-25 23:30:32,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426247134] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:30:32,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682134904] [2022-11-25 23:30:32,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:32,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:30:32,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:30:32,146 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:30:32,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:30:32,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:32,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 23:30:32,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:30:32,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:32,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:32,902 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:30:32,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 127 treesize of output 123 [2022-11-25 23:30:32,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:32,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:32,935 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:30:32,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 91 [2022-11-25 23:30:33,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:30:33,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:30:33,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682134904] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:30:33,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1035133400] [2022-11-25 23:30:33,882 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-25 23:30:33,882 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:30:33,888 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:30:33,893 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:30:33,893 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:30:34,378 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 15 for LOIs [2022-11-25 23:30:34,381 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:30:36,310 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12991#(and (= |ULTIMATE.start_is_empty_~no_beg~0#1| (ite (and (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_is_empty_~list#1.base|) (+ |ULTIMATE.start_is_empty_~list#1.offset| (* ~unnamed1~0~LIST_BEG 4))) 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_is_empty_~list#1.base|) (+ |ULTIMATE.start_is_empty_~list#1.offset| (* ~unnamed1~0~LIST_BEG 4))) 0)) 1 0)) (= |ULTIMATE.start_is_empty_~list#1.base| |ULTIMATE.start_is_empty_#in~list#1.base|) (= |ULTIMATE.start_remove_one_~list#1.offset| |ULTIMATE.start_is_empty_#in~list#1.offset|) (= |ULTIMATE.start_remove_one_#in~list#1.base| |ULTIMATE.start_remove_one_~list#1.base|) (= |ULTIMATE.start_is_empty_~no_end~0#1| (ite (and (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_is_empty_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset|)) 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_is_empty_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset|)) 0)) 1 0)) (= 3 |~#list~0.base|) (<= 0 ~i~0) (= |ULTIMATE.start_remove_one_#in~from#1| |ULTIMATE.start_main_#t~ret27#1|) (= |ULTIMATE.start_remove_one_#in~from#1| |ULTIMATE.start_remove_one_~from#1|) (= |ULTIMATE.start_main_~y~0#1| 0) (= |ULTIMATE.start_remove_one_#in~list#1.base| |~#list~0.base|) (or (< 10 ~i~0) (not (= |ULTIMATE.start_is_empty_~no_end~0#1| |ULTIMATE.start_is_empty_~no_beg~0#1|))) (<= (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset| 4) (select |#length| |ULTIMATE.start_is_empty_~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_is_empty_~list#1.offset| 0) (= |ULTIMATE.start_main_~z~0#1| 0) (= |#NULL.offset| 0) (= |ULTIMATE.start_is_empty_#in~list#1.base| |ULTIMATE.start_remove_one_~list#1.base|) (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_main_#t~ret27#1|) (= (select |#valid| |ULTIMATE.start_is_empty_~list#1.base|) 1) (= |ULTIMATE.start_remove_one_~list#1.offset| |ULTIMATE.start_remove_one_#in~list#1.offset|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~length~0#1| 0) (not (< |ULTIMATE.start_is_empty_~list#1.base| |#StackHeapBarrier|)) (= |#NULL.base| 0))' at error location [2022-11-25 23:30:36,310 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:30:36,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:30:36,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2022-11-25 23:30:36,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662036184] [2022-11-25 23:30:36,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:30:36,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 23:30:36,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:30:36,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 23:30:36,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2022-11-25 23:30:36,312 INFO L87 Difference]: Start difference. First operand 353 states and 479 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 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) [2022-11-25 23:30:38,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:30:38,400 INFO L93 Difference]: Finished difference Result 739 states and 941 transitions. [2022-11-25 23:30:38,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 23:30:38,405 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 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 23 [2022-11-25 23:30:38,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:30:38,407 INFO L225 Difference]: With dead ends: 739 [2022-11-25 23:30:38,407 INFO L226 Difference]: Without dead ends: 735 [2022-11-25 23:30:38,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=291, Invalid=1431, Unknown=0, NotChecked=0, Total=1722 [2022-11-25 23:30:38,409 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 551 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 1051 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:30:38,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [555 Valid, 1051 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 803 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 23:30:38,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2022-11-25 23:30:38,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 453. [2022-11-25 23:30:38,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 374 states have (on average 1.5160427807486632) internal successors, (567), 423 states have internal predecessors, (567), 23 states have call successors, (23), 12 states have call predecessors, (23), 12 states have return successors, (23), 17 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-25 23:30:38,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 613 transitions. [2022-11-25 23:30:38,421 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 613 transitions. Word has length 23 [2022-11-25 23:30:38,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:30:38,421 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 613 transitions. [2022-11-25 23:30:38,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 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) [2022-11-25 23:30:38,422 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 613 transitions. [2022-11-25 23:30:38,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-25 23:30:38,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:38,422 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] [2022-11-25 23:30:38,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 23:30:38,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-25 23:30:38,628 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:30:38,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:38,628 INFO L85 PathProgramCache]: Analyzing trace with hash -2063322473, now seen corresponding path program 1 times [2022-11-25 23:30:38,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:38,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567923997] [2022-11-25 23:30:38,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:38,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:38,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:38,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:30:38,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:38,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567923997] [2022-11-25 23:30:38,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567923997] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:30:38,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:30:38,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 23:30:38,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397875305] [2022-11-25 23:30:38,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:30:38,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:30:38,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:30:38,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:30:38,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:30:38,883 INFO L87 Difference]: Start difference. First operand 453 states and 613 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) [2022-11-25 23:30:39,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:30:39,514 INFO L93 Difference]: Finished difference Result 799 states and 1055 transitions. [2022-11-25 23:30:39,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 23:30:39,514 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 [2022-11-25 23:30:39,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:30:39,516 INFO L225 Difference]: With dead ends: 799 [2022-11-25 23:30:39,517 INFO L226 Difference]: Without dead ends: 799 [2022-11-25 23:30:39,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-25 23:30:39,517 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 262 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:30:39,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 443 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:30:39,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-11-25 23:30:39,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 499. [2022-11-25 23:30:39,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 414 states have (on average 1.4951690821256038) internal successors, (619), 465 states have internal predecessors, (619), 27 states have call successors, (27), 14 states have call predecessors, (27), 14 states have return successors, (27), 19 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-25 23:30:39,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 673 transitions. [2022-11-25 23:30:39,541 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 673 transitions. Word has length 24 [2022-11-25 23:30:39,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:30:39,541 INFO L495 AbstractCegarLoop]: Abstraction has 499 states and 673 transitions. [2022-11-25 23:30:39,541 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) [2022-11-25 23:30:39,542 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 673 transitions. [2022-11-25 23:30:39,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-25 23:30:39,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:39,547 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] [2022-11-25 23:30:39,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-25 23:30:39,548 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:30:39,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:39,548 INFO L85 PathProgramCache]: Analyzing trace with hash 461512992, now seen corresponding path program 1 times [2022-11-25 23:30:39,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:39,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203651937] [2022-11-25 23:30:39,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:39,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:39,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:30:39,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:39,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203651937] [2022-11-25 23:30:39,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203651937] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:30:39,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:30:39,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 23:30:39,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534851825] [2022-11-25 23:30:39,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:30:39,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:30:39,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:30:39,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:30:39,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:30:39,798 INFO L87 Difference]: Start difference. First operand 499 states and 673 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 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) [2022-11-25 23:30:40,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:30:40,223 INFO L93 Difference]: Finished difference Result 629 states and 792 transitions. [2022-11-25 23:30:40,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:30:40,226 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 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 [2022-11-25 23:30:40,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:30:40,228 INFO L225 Difference]: With dead ends: 629 [2022-11-25 23:30:40,228 INFO L226 Difference]: Without dead ends: 629 [2022-11-25 23:30:40,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-25 23:30:40,229 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 393 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:30:40,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 373 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:30:40,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-11-25 23:30:40,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 499. [2022-11-25 23:30:40,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 414 states have (on average 1.4758454106280192) internal successors, (611), 465 states have internal predecessors, (611), 27 states have call successors, (27), 14 states have call predecessors, (27), 14 states have return successors, (27), 19 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-25 23:30:40,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 665 transitions. [2022-11-25 23:30:40,253 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 665 transitions. Word has length 25 [2022-11-25 23:30:40,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:30:40,253 INFO L495 AbstractCegarLoop]: Abstraction has 499 states and 665 transitions. [2022-11-25 23:30:40,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 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) [2022-11-25 23:30:40,253 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 665 transitions. [2022-11-25 23:30:40,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 23:30:40,254 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:40,254 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] [2022-11-25 23:30:40,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-25 23:30:40,255 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:30:40,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:40,255 INFO L85 PathProgramCache]: Analyzing trace with hash 136633119, now seen corresponding path program 1 times [2022-11-25 23:30:40,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:40,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677755125] [2022-11-25 23:30:40,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:40,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:40,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:40,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:30:40,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:40,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677755125] [2022-11-25 23:30:40,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677755125] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:30:40,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995648548] [2022-11-25 23:30:40,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:40,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:30:40,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:30:40,554 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:30:40,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:30:40,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:40,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-25 23:30:40,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:30:40,937 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:30:40,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:30:41,073 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:30:41,073 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 30 treesize of output 34 [2022-11-25 23:30:41,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:30:41,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995648548] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:30:41,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1912630148] [2022-11-25 23:30:41,287 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-25 23:30:41,287 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:30:41,288 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:30:41,288 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:30:41,288 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:30:41,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:30:41,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:41,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:41,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:41,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:41,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:41,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 38 [2022-11-25 23:30:41,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:41,624 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 [2022-11-25 23:30:41,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:30:41,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:41,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:41,648 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 43 treesize of output 41 [2022-11-25 23:30:41,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:30:41,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:41,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:41,670 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 43 treesize of output 41 [2022-11-25 23:30:41,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:41,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:41,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:41,755 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 58 treesize of output 55 [2022-11-25 23:30:41,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:41,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:41,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:41,782 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 58 treesize of output 55 [2022-11-25 23:30:41,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:41,805 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 [2022-11-25 23:30:41,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:41,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:41,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:41,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:41,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:41,874 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 62 treesize of output 55 [2022-11-25 23:30:41,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:41,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:41,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:41,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:41,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:41,906 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 73 treesize of output 58 [2022-11-25 23:30:41,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:41,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-25 23:30:42,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:42,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:42,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:42,078 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 69 treesize of output 58 [2022-11-25 23:30:42,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:42,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:42,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:42,108 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 [2022-11-25 23:30:42,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:42,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:42,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:42,133 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 58 treesize of output 55 [2022-11-25 23:30:42,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:42,671 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 [2022-11-25 23:30:42,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:30:42,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:42,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:42,690 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 43 treesize of output 41 [2022-11-25 23:30:42,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:30:42,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:42,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:42,714 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 43 treesize of output 41 [2022-11-25 23:30:42,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:42,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:42,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:42,774 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 58 treesize of output 55 [2022-11-25 23:30:42,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:42,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:42,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:42,809 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 47 treesize of output 52 [2022-11-25 23:30:42,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:42,831 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 [2022-11-25 23:30:42,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:42,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:42,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:42,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:42,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:42,928 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 62 treesize of output 55 [2022-11-25 23:30:42,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:42,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:42,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:42,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:42,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:42,990 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 62 treesize of output 55 [2022-11-25 23:30:43,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:43,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-25 23:30:43,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:43,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:43,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:43,192 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 58 treesize of output 55 [2022-11-25 23:30:43,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:43,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:43,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:43,228 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 [2022-11-25 23:30:43,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:43,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:43,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:43,254 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 58 treesize of output 55 [2022-11-25 23:30:43,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:30:43,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:43,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:43,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:43,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:43,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:43,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 38 [2022-11-25 23:30:43,593 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 56 for LOIs [2022-11-25 23:30:43,597 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:30:49,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1912630148] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:30:49,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:30:49,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [7, 7, 8] total 38 [2022-11-25 23:30:49,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981901179] [2022-11-25 23:30:49,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:30:49,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 23:30:49,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:30:49,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 23:30:49,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=1042, Unknown=0, NotChecked=0, Total=1406 [2022-11-25 23:30:49,577 INFO L87 Difference]: Start difference. First operand 499 states and 665 transitions. Second operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 15 states have internal predecessors, (21), 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) [2022-11-25 23:30:51,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:30:51,128 INFO L93 Difference]: Finished difference Result 538 states and 707 transitions. [2022-11-25 23:30:51,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 23:30:51,128 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 15 states have internal predecessors, (21), 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 29 [2022-11-25 23:30:51,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:30:51,130 INFO L225 Difference]: With dead ends: 538 [2022-11-25 23:30:51,130 INFO L226 Difference]: Without dead ends: 538 [2022-11-25 23:30:51,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=364, Invalid=1042, Unknown=0, NotChecked=0, Total=1406 [2022-11-25 23:30:51,131 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 37 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:30:51,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 234 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-25 23:30:51,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-11-25 23:30:51,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 512. [2022-11-25 23:30:51,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 427 states have (on average 1.4613583138173303) internal successors, (624), 477 states have internal predecessors, (624), 27 states have call successors, (27), 14 states have call predecessors, (27), 14 states have return successors, (27), 20 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-25 23:30:51,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 678 transitions. [2022-11-25 23:30:51,157 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 678 transitions. Word has length 29 [2022-11-25 23:30:51,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:30:51,157 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 678 transitions. [2022-11-25 23:30:51,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 15 states have internal predecessors, (21), 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) [2022-11-25 23:30:51,158 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 678 transitions. [2022-11-25 23:30:51,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-25 23:30:51,160 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:51,160 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] [2022-11-25 23:30:51,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 23:30:51,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:30:51,365 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:30:51,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:51,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1938966803, now seen corresponding path program 1 times [2022-11-25 23:30:51,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:51,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083644878] [2022-11-25 23:30:51,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:51,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:51,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:51,696 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:30:51,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:51,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083644878] [2022-11-25 23:30:51,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083644878] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:30:51,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360296256] [2022-11-25 23:30:51,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:51,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:30:51,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:30:51,698 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:30:51,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:30:51,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:51,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-25 23:30:51,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:30:52,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:30:52,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:30:52,257 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:30:52,257 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 30 treesize of output 34 [2022-11-25 23:30:52,424 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:30:52,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360296256] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:30:52,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [892613412] [2022-11-25 23:30:52,430 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-25 23:30:52,430 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:30:52,431 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:30:52,431 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:30:52,431 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:30:52,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:30:52,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:52,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:52,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:52,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:52,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:52,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 38 [2022-11-25 23:30:52,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:30:52,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:52,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:52,698 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 43 treesize of output 41 [2022-11-25 23:30:52,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:52,726 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 [2022-11-25 23:30:52,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:30:52,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:52,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:52,749 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 43 treesize of output 41 [2022-11-25 23:30:52,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:52,800 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 [2022-11-25 23:30:52,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:52,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:52,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:52,826 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 47 treesize of output 52 [2022-11-25 23:30:52,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:52,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:52,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:52,883 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 47 treesize of output 52 [2022-11-25 23:30:52,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:52,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-25 23:30:52,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:52,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:52,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:52,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:53,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:53,002 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 62 treesize of output 55 [2022-11-25 23:30:53,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:53,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:53,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:53,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:53,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:53,038 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 62 treesize of output 55 [2022-11-25 23:30:53,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:53,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:53,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:53,189 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 [2022-11-25 23:30:53,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:53,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:53,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:53,212 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 58 treesize of output 55 [2022-11-25 23:30:53,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:53,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:53,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:53,237 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 58 treesize of output 55 [2022-11-25 23:30:53,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:53,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:53,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:53,435 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 [2022-11-25 23:30:53,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:53,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:53,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:30:53,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:53,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:53,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:30:53,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 72 [2022-11-25 23:30:53,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:53,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:53,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:30:53,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:53,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:53,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:30:53,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 64 [2022-11-25 23:30:53,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:53,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:53,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:53,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:30:53,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:30:53,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 36 [2022-11-25 23:30:53,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:53,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:53,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:53,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:30:53,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:30:53,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 36 [2022-11-25 23:30:54,063 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:30:54,064 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 [2022-11-25 23:30:54,080 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 17 treesize of output 19 [2022-11-25 23:30:54,181 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 [2022-11-25 23:30:54,190 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 [2022-11-25 23:30:54,204 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 23 treesize of output 1 [2022-11-25 23:30:54,252 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-25 23:30:54,252 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 27 treesize of output 34 [2022-11-25 23:30:54,266 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 [2022-11-25 23:30:54,292 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-25 23:30:54,292 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 27 treesize of output 34 [2022-11-25 23:30:54,370 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-25 23:30:54,371 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 50 treesize of output 61 [2022-11-25 23:30:54,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:30:54,452 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-25 23:30:54,452 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 50 treesize of output 61 [2022-11-25 23:30:54,606 INFO L321 Elim1Store]: treesize reduction 56, result has 54.5 percent of original size [2022-11-25 23:30:54,606 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 79 treesize of output 117 [2022-11-25 23:30:54,755 INFO L321 Elim1Store]: treesize reduction 56, result has 54.5 percent of original size [2022-11-25 23:30:54,755 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 79 treesize of output 117 [2022-11-25 23:30:54,885 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-25 23:30:54,886 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 33 treesize of output 27 [2022-11-25 23:31:01,291 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 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-25 23:31:01,309 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 [2022-11-25 23:31:01,553 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 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-25 23:31:04,985 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:31:04,986 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-25 23:31:05,017 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:31:05,017 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 [2022-11-25 23:31:05,110 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 [2022-11-25 23:31:05,120 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 [2022-11-25 23:31:05,129 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 [2022-11-25 23:31:05,152 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 [2022-11-25 23:31:05,179 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-25 23:31:05,181 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 27 treesize of output 34 [2022-11-25 23:31:05,210 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-25 23:31:05,211 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 27 treesize of output 34 [2022-11-25 23:31:05,288 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-25 23:31:05,289 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 50 treesize of output 61 [2022-11-25 23:31:05,359 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-25 23:31:05,360 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 50 treesize of output 61 [2022-11-25 23:31:05,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:31:05,584 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 [2022-11-25 23:31:05,597 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 [2022-11-25 23:31:05,609 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 [2022-11-25 23:31:05,949 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 [2022-11-25 23:31:06,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:06,052 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-25 23:31:06,053 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 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-25 23:31:06,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:06,102 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-25 23:31:06,103 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 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-25 23:31:06,503 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:31:06,503 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-25 23:31:06,536 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:31:06,536 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 [2022-11-25 23:31:06,625 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 69 for LOIs [2022-11-25 23:31:06,630 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:31:13,486 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18131#(and (<= |~#list~0.base| 3) (= |~#list~0.offset| |ULTIMATE.start_append_one_#in~list#1.offset|) (<= 0 |#NULL.base|) (<= ~i~0 0) (<= |ULTIMATE.start_main_~z~0#1| 0) (or (not (<= (+ (* 4 |ULTIMATE.start_append_one_~to#1|) |ULTIMATE.start_append_one_~list#1.offset| 4) (select |#length| |ULTIMATE.start_append_one_~list#1.base|))) (not (<= 0 (+ (* 4 |ULTIMATE.start_append_one_~to#1|) |ULTIMATE.start_append_one_~list#1.offset|)))) (<= |ULTIMATE.start_main_~y~0#1| 5) (<= |ULTIMATE.start_main_#t~ret22#1| 2147483647) (<= 0 ~i~0) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start_append_one_~list#1.offset| |ULTIMATE.start_append_one_#in~list#1.offset|) (= |ULTIMATE.start_append_one_#in~list#1.base| |ULTIMATE.start_append_one_~list#1.base|) (<= 0 |ULTIMATE.start_main_~length~0#1|) (= |ULTIMATE.start_append_one_#in~to#1| |ULTIMATE.start_append_one_~to#1|) (<= 0 (+ |ULTIMATE.start_main_#t~ret22#1| 2147483648)) (<= |#NULL.base| 0) (= |ULTIMATE.start_append_one_#in~list#1.base| |~#list~0.base|) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (= |ULTIMATE.start_append_one_#in~to#1| |ULTIMATE.start_main_#t~ret22#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |~#list~0.offset| 0) (<= 0 |ULTIMATE.start_main_~z~0#1|))' at error location [2022-11-25 23:31:13,487 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:31:13,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:31:13,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 22 [2022-11-25 23:31:13,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34068685] [2022-11-25 23:31:13,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:31:13,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 23:31:13,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:31:13,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 23:31:13,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=1664, Unknown=0, NotChecked=0, Total=2070 [2022-11-25 23:31:13,489 INFO L87 Difference]: Start difference. First operand 512 states and 678 transitions. Second operand has 23 states, 19 states have (on average 4.052631578947368) internal successors, (77), 20 states have internal predecessors, (77), 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) [2022-11-25 23:31:14,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:31:14,005 INFO L93 Difference]: Finished difference Result 533 states and 675 transitions. [2022-11-25 23:31:14,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:31:14,007 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 4.052631578947368) internal successors, (77), 20 states have internal predecessors, (77), 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 30 [2022-11-25 23:31:14,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:31:14,009 INFO L225 Difference]: With dead ends: 533 [2022-11-25 23:31:14,009 INFO L226 Difference]: Without dead ends: 533 [2022-11-25 23:31:14,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=444, Invalid=1812, Unknown=0, NotChecked=0, Total=2256 [2022-11-25 23:31:14,011 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 914 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 915 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:31:14,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [915 Valid, 646 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:31:14,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-11-25 23:31:14,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 498. [2022-11-25 23:31:14,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 415 states have (on average 1.453012048192771) internal successors, (603), 464 states have internal predecessors, (603), 27 states have call successors, (27), 14 states have call predecessors, (27), 14 states have return successors, (27), 19 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-25 23:31:14,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 657 transitions. [2022-11-25 23:31:14,038 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 657 transitions. Word has length 30 [2022-11-25 23:31:14,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:31:14,038 INFO L495 AbstractCegarLoop]: Abstraction has 498 states and 657 transitions. [2022-11-25 23:31:14,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 4.052631578947368) internal successors, (77), 20 states have internal predecessors, (77), 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) [2022-11-25 23:31:14,039 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 657 transitions. [2022-11-25 23:31:14,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-25 23:31:14,039 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:31:14,040 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] [2022-11-25 23:31:14,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 23:31:14,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-25 23:31:14,247 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:31:14,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:31:14,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1085149533, now seen corresponding path program 1 times [2022-11-25 23:31:14,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:31:14,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605786868] [2022-11-25 23:31:14,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:14,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:31:14,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:14,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:31:14,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:31:14,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605786868] [2022-11-25 23:31:14,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605786868] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:31:14,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:31:14,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 23:31:14,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434868229] [2022-11-25 23:31:14,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:31:14,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:31:14,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:31:14,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:31:14,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:31:14,591 INFO L87 Difference]: Start difference. First operand 498 states and 657 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 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) [2022-11-25 23:31:14,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:31:14,892 INFO L93 Difference]: Finished difference Result 599 states and 759 transitions. [2022-11-25 23:31:14,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:31:14,893 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 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 32 [2022-11-25 23:31:14,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:31:14,895 INFO L225 Difference]: With dead ends: 599 [2022-11-25 23:31:14,895 INFO L226 Difference]: Without dead ends: 599 [2022-11-25 23:31:14,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:31:14,896 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 352 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:31:14,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 189 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:31:14,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-11-25 23:31:14,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 496. [2022-11-25 23:31:14,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 415 states have (on average 1.4433734939759035) internal successors, (599), 462 states have internal predecessors, (599), 27 states have call successors, (27), 14 states have call predecessors, (27), 14 states have return successors, (27), 19 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-25 23:31:14,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 653 transitions. [2022-11-25 23:31:14,908 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 653 transitions. Word has length 32 [2022-11-25 23:31:14,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:31:14,909 INFO L495 AbstractCegarLoop]: Abstraction has 496 states and 653 transitions. [2022-11-25 23:31:14,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 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) [2022-11-25 23:31:14,909 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 653 transitions. [2022-11-25 23:31:14,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-25 23:31:14,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:31:14,910 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] [2022-11-25 23:31:14,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-25 23:31:14,910 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:31:14,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:31:14,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1184501238, now seen corresponding path program 1 times [2022-11-25 23:31:14,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:31:14,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059278871] [2022-11-25 23:31:14,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:14,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:31:14,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:15,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:31:15,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:31:15,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059278871] [2022-11-25 23:31:15,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059278871] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:31:15,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:31:15,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 23:31:15,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796500892] [2022-11-25 23:31:15,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:31:15,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:31:15,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:31:15,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:31:15,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:31:15,207 INFO L87 Difference]: Start difference. First operand 496 states and 653 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 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) [2022-11-25 23:31:15,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:31:15,436 INFO L93 Difference]: Finished difference Result 519 states and 653 transitions. [2022-11-25 23:31:15,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:31:15,437 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 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 32 [2022-11-25 23:31:15,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:31:15,438 INFO L225 Difference]: With dead ends: 519 [2022-11-25 23:31:15,438 INFO L226 Difference]: Without dead ends: 519 [2022-11-25 23:31:15,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-11-25 23:31:15,439 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 411 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:31:15,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 237 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:31:15,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-11-25 23:31:15,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 495. [2022-11-25 23:31:15,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 415 states have (on average 1.4385542168674699) internal successors, (597), 461 states have internal predecessors, (597), 27 states have call successors, (27), 14 states have call predecessors, (27), 14 states have return successors, (27), 19 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-25 23:31:15,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 651 transitions. [2022-11-25 23:31:15,451 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 651 transitions. Word has length 32 [2022-11-25 23:31:15,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:31:15,452 INFO L495 AbstractCegarLoop]: Abstraction has 495 states and 651 transitions. [2022-11-25 23:31:15,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 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) [2022-11-25 23:31:15,453 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 651 transitions. [2022-11-25 23:31:15,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-25 23:31:15,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:31:15,453 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] [2022-11-25 23:31:15,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-25 23:31:15,454 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:31:15,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:31:15,454 INFO L85 PathProgramCache]: Analyzing trace with hash -9535657, now seen corresponding path program 1 times [2022-11-25 23:31:15,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:31:15,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937120927] [2022-11-25 23:31:15,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:15,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:31:15,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:15,580 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:31:15,581 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:31:15,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937120927] [2022-11-25 23:31:15,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937120927] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:31:15,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022321535] [2022-11-25 23:31:15,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:15,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:31:15,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:31:15,583 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:31:15,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:31:15,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:15,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 23:31:15,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:31:15,859 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:31:15,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:31:15,888 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-25 23:31:15,888 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 [2022-11-25 23:31:15,913 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:31:15,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022321535] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:31:15,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1528015845] [2022-11-25 23:31:15,918 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-25 23:31:15,918 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:31:15,919 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:31:15,919 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:31:15,919 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:31:16,639 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 56 for LOIs [2022-11-25 23:31:16,643 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:31:19,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1528015845] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:31:19,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:31:19,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 5, 5] total 23 [2022-11-25 23:31:19,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155520990] [2022-11-25 23:31:19,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:31:19,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 23:31:19,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:31:19,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 23:31:19,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2022-11-25 23:31:19,131 INFO L87 Difference]: Start difference. First operand 495 states and 651 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) [2022-11-25 23:31:20,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:31:20,606 INFO L93 Difference]: Finished difference Result 513 states and 671 transitions. [2022-11-25 23:31:20,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 23:31:20,606 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 [2022-11-25 23:31:20,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:31:20,608 INFO L225 Difference]: With dead ends: 513 [2022-11-25 23:31:20,608 INFO L226 Difference]: Without dead ends: 513 [2022-11-25 23:31:20,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2022-11-25 23:31:20,609 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 25 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:31:20,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 284 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-25 23:31:20,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-11-25 23:31:20,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 504. [2022-11-25 23:31:20,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 423 states have (on average 1.4326241134751774) internal successors, (606), 469 states have internal predecessors, (606), 28 states have call successors, (28), 14 states have call predecessors, (28), 14 states have return successors, (28), 20 states have call predecessors, (28), 28 states have call successors, (28) [2022-11-25 23:31:20,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 662 transitions. [2022-11-25 23:31:20,629 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 662 transitions. Word has length 34 [2022-11-25 23:31:20,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:31:20,630 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 662 transitions. [2022-11-25 23:31:20,630 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) [2022-11-25 23:31:20,631 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 662 transitions. [2022-11-25 23:31:20,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-25 23:31:20,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:31:20,633 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] [2022-11-25 23:31:20,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:31:20,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-25 23:31:20,839 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:31:20,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:31:20,839 INFO L85 PathProgramCache]: Analyzing trace with hash -139305668, now seen corresponding path program 1 times [2022-11-25 23:31:20,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:31:20,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772321493] [2022-11-25 23:31:20,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:20,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:31:20,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:20,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:31:20,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:31:20,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772321493] [2022-11-25 23:31:20,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772321493] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:31:20,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029653403] [2022-11-25 23:31:20,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:20,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:31:20,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:31:20,926 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:31:20,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:31:21,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:21,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 23:31:21,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:31:21,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:31:21,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:31:21,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029653403] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:31:21,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:31:21,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-11-25 23:31:21,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684627932] [2022-11-25 23:31:21,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:31:21,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:31:21,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:31:21,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:31:21,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:31:21,113 INFO L87 Difference]: Start difference. First operand 504 states and 662 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 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) [2022-11-25 23:31:21,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:31:21,191 INFO L93 Difference]: Finished difference Result 639 states and 830 transitions. [2022-11-25 23:31:21,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:31:21,192 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 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 34 [2022-11-25 23:31:21,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:31:21,194 INFO L225 Difference]: With dead ends: 639 [2022-11-25 23:31:21,194 INFO L226 Difference]: Without dead ends: 639 [2022-11-25 23:31:21,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:31:21,195 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 172 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:31:21,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 253 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:31:21,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-11-25 23:31:21,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 523. [2022-11-25 23:31:21,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 442 states have (on average 1.4298642533936652) internal successors, (632), 488 states have internal predecessors, (632), 28 states have call successors, (28), 14 states have call predecessors, (28), 14 states have return successors, (28), 20 states have call predecessors, (28), 28 states have call successors, (28) [2022-11-25 23:31:21,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 688 transitions. [2022-11-25 23:31:21,217 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 688 transitions. Word has length 34 [2022-11-25 23:31:21,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:31:21,217 INFO L495 AbstractCegarLoop]: Abstraction has 523 states and 688 transitions. [2022-11-25 23:31:21,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 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) [2022-11-25 23:31:21,218 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 688 transitions. [2022-11-25 23:31:21,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-25 23:31:21,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:31:21,219 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] [2022-11-25 23:31:21,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 23:31:21,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:31:21,430 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:31:21,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:31:21,430 INFO L85 PathProgramCache]: Analyzing trace with hash -139306953, now seen corresponding path program 1 times [2022-11-25 23:31:21,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:31:21,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026427139] [2022-11-25 23:31:21,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:21,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:31:21,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:22,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:31:22,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:31:22,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026427139] [2022-11-25 23:31:22,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026427139] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:31:22,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:31:22,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-25 23:31:22,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109533173] [2022-11-25 23:31:22,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:31:22,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 23:31:22,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:31:22,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 23:31:22,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:31:22,402 INFO L87 Difference]: Start difference. First operand 523 states and 688 transitions. Second operand has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2022-11-25 23:31:23,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:31:23,645 INFO L93 Difference]: Finished difference Result 740 states and 920 transitions. [2022-11-25 23:31:23,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 23:31:23,645 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 34 [2022-11-25 23:31:23,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:31:23,647 INFO L225 Difference]: With dead ends: 740 [2022-11-25 23:31:23,647 INFO L226 Difference]: Without dead ends: 740 [2022-11-25 23:31:23,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2022-11-25 23:31:23,648 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 954 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 957 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:31:23,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [957 Valid, 750 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 23:31:23,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2022-11-25 23:31:23,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 585. [2022-11-25 23:31:23,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 499 states have (on average 1.4228456913827656) internal successors, (710), 546 states have internal predecessors, (710), 32 states have call successors, (32), 16 states have call predecessors, (32), 16 states have return successors, (32), 22 states have call predecessors, (32), 32 states have call successors, (32) [2022-11-25 23:31:23,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 774 transitions. [2022-11-25 23:31:23,663 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 774 transitions. Word has length 34 [2022-11-25 23:31:23,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:31:23,663 INFO L495 AbstractCegarLoop]: Abstraction has 585 states and 774 transitions. [2022-11-25 23:31:23,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2022-11-25 23:31:23,663 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 774 transitions. [2022-11-25 23:31:23,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-25 23:31:23,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:31:23,664 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] [2022-11-25 23:31:23,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-25 23:31:23,664 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:31:23,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:31:23,665 INFO L85 PathProgramCache]: Analyzing trace with hash -139306952, now seen corresponding path program 1 times [2022-11-25 23:31:23,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:31:23,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125881061] [2022-11-25 23:31:23,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:23,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:31:23,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:25,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:31:25,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:31:25,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125881061] [2022-11-25 23:31:25,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125881061] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:31:25,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:31:25,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-25 23:31:25,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448268837] [2022-11-25 23:31:25,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:31:25,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 23:31:25,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:31:25,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 23:31:25,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-11-25 23:31:25,942 INFO L87 Difference]: Start difference. First operand 585 states and 774 transitions. Second operand has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 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) [2022-11-25 23:31:28,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:31:28,570 INFO L93 Difference]: Finished difference Result 908 states and 1154 transitions. [2022-11-25 23:31:28,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 23:31:28,571 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 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 34 [2022-11-25 23:31:28,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:31:28,573 INFO L225 Difference]: With dead ends: 908 [2022-11-25 23:31:28,574 INFO L226 Difference]: Without dead ends: 908 [2022-11-25 23:31:28,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=317, Invalid=943, Unknown=0, NotChecked=0, Total=1260 [2022-11-25 23:31:28,575 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 1138 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1139 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:31:28,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1139 Valid, 914 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 974 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 23:31:28,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2022-11-25 23:31:28,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 787. [2022-11-25 23:31:28,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 689 states have (on average 1.4600870827285921) internal successors, (1006), 737 states have internal predecessors, (1006), 40 states have call successors, (40), 20 states have call predecessors, (40), 20 states have return successors, (40), 29 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-25 23:31:28,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1086 transitions. [2022-11-25 23:31:28,597 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1086 transitions. Word has length 34 [2022-11-25 23:31:28,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:31:28,597 INFO L495 AbstractCegarLoop]: Abstraction has 787 states and 1086 transitions. [2022-11-25 23:31:28,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 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) [2022-11-25 23:31:28,598 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1086 transitions. [2022-11-25 23:31:28,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-25 23:31:28,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:31:28,599 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] [2022-11-25 23:31:28,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-25 23:31:28,599 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:31:28,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:31:28,599 INFO L85 PathProgramCache]: Analyzing trace with hash 533639021, now seen corresponding path program 1 times [2022-11-25 23:31:28,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:31:28,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085269511] [2022-11-25 23:31:28,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:28,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:31:28,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:28,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:31:28,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:31:28,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085269511] [2022-11-25 23:31:28,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085269511] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:31:28,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484268703] [2022-11-25 23:31:28,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:28,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:31:28,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:31:28,927 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:31:28,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 23:31:29,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:29,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 23:31:29,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:31:29,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:31:29,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:31:29,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484268703] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:31:29,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:31:29,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2022-11-25 23:31:29,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727966425] [2022-11-25 23:31:29,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:31:29,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:31:29,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:31:29,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:31:29,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-25 23:31:29,144 INFO L87 Difference]: Start difference. First operand 787 states and 1086 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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) [2022-11-25 23:31:29,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:31:29,224 INFO L93 Difference]: Finished difference Result 912 states and 1243 transitions. [2022-11-25 23:31:29,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:31:29,225 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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 35 [2022-11-25 23:31:29,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:31:29,228 INFO L225 Difference]: With dead ends: 912 [2022-11-25 23:31:29,228 INFO L226 Difference]: Without dead ends: 912 [2022-11-25 23:31:29,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:31:29,229 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 287 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:31:29,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 164 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:31:29,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2022-11-25 23:31:29,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 786. [2022-11-25 23:31:29,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 689 states have (on average 1.4528301886792452) internal successors, (1001), 736 states have internal predecessors, (1001), 40 states have call successors, (40), 20 states have call predecessors, (40), 20 states have return successors, (40), 29 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-25 23:31:29,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1081 transitions. [2022-11-25 23:31:29,249 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1081 transitions. Word has length 35 [2022-11-25 23:31:29,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:31:29,249 INFO L495 AbstractCegarLoop]: Abstraction has 786 states and 1081 transitions. [2022-11-25 23:31:29,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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) [2022-11-25 23:31:29,249 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1081 transitions. [2022-11-25 23:31:29,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-25 23:31:29,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:31:29,250 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] [2022-11-25 23:31:29,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 23:31:29,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-25 23:31:29,457 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:31:29,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:31:29,458 INFO L85 PathProgramCache]: Analyzing trace with hash -637059353, now seen corresponding path program 1 times [2022-11-25 23:31:29,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:31:29,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472456776] [2022-11-25 23:31:29,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:29,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:31:29,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:31,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:31:31,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:31:31,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472456776] [2022-11-25 23:31:31,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472456776] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:31:31,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586140249] [2022-11-25 23:31:31,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:31,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:31:31,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:31:31,632 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:31:31,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 23:31:31,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:31,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-25 23:31:31,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:31:32,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:32,215 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 35 treesize of output 34 [2022-11-25 23:31:32,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:32,226 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 35 treesize of output 34 [2022-11-25 23:31:32,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:32,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:32,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:32,542 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:31:32,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 144 treesize of output 130 [2022-11-25 23:31:32,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:32,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:32,554 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:31:32,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 66 [2022-11-25 23:31:32,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:31:32,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:31:34,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:31:34,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:31:34,163 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:31:34,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 247 treesize of output 243 [2022-11-25 23:31:34,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:31:34,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:31:34,194 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:31:34,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 207 treesize of output 191 [2022-11-25 23:31:34,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:31:34,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586140249] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:31:34,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [169386005] [2022-11-25 23:31:34,911 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-25 23:31:34,912 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:31:34,912 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:31:34,912 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:31:34,912 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:31:35,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:31:35,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 38 [2022-11-25 23:31:35,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,196 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 [2022-11-25 23:31:35,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:31:35,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,220 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 43 treesize of output 41 [2022-11-25 23:31:35,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:31:35,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,241 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 43 treesize of output 41 [2022-11-25 23:31:35,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,291 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 47 treesize of output 52 [2022-11-25 23:31:35,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,325 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 58 treesize of output 55 [2022-11-25 23:31:35,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,350 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 [2022-11-25 23:31:35,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,398 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 62 treesize of output 55 [2022-11-25 23:31:35,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-25 23:31:35,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,475 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 62 treesize of output 55 [2022-11-25 23:31:35,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,578 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 58 treesize of output 55 [2022-11-25 23:31:35,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,606 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 [2022-11-25 23:31:35,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,646 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 69 treesize of output 58 [2022-11-25 23:31:35,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:31:35,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:31:35,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 72 [2022-11-25 23:31:35,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:31:35,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:31:35,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 72 [2022-11-25 23:31:35,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:35,915 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 [2022-11-25 23:31:36,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:36,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:36,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:36,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:31:36,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:31:36,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 36 [2022-11-25 23:31:36,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:36,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:36,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:36,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:31:36,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:31:36,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 36 [2022-11-25 23:31:36,330 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:31:36,330 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-25 23:31:36,357 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:31:36,358 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 [2022-11-25 23:31:36,457 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 [2022-11-25 23:31:36,477 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 [2022-11-25 23:31:36,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:31:36,538 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-25 23:31:36,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 48 [2022-11-25 23:31:36,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:31:36,588 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-25 23:31:36,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 48 [2022-11-25 23:31:36,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:31:36,696 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-25 23:31:36,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 75 [2022-11-25 23:31:36,762 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-25 23:31:36,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 75 [2022-11-25 23:31:37,630 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 [2022-11-25 23:31:37,644 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 [2022-11-25 23:31:37,657 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 [2022-11-25 23:31:37,870 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 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-25 23:31:37,884 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 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-25 23:31:37,902 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 [2022-11-25 23:31:38,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:31:38,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:38,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-25 23:31:38,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:31:38,164 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:31:38,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 21 [2022-11-25 23:31:38,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:31:38,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:38,280 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 49 treesize of output 43 [2022-11-25 23:31:38,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:38,310 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 [2022-11-25 23:31:38,323 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 [2022-11-25 23:31:38,365 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 [2022-11-25 23:31:38,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:38,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:31:38,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:38,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:38,383 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 60 treesize of output 57 [2022-11-25 23:31:38,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:38,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:31:38,428 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-25 23:31:38,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 44 [2022-11-25 23:31:38,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:38,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:38,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:38,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:38,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:38,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:31:38,494 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-25 23:31:38,495 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 2 case distinctions, treesize of input 57 treesize of output 47 [2022-11-25 23:31:38,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:38,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:31:38,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:38,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:38,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:38,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:38,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 60 [2022-11-25 23:31:38,576 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 [2022-11-25 23:31:38,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:38,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:38,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:31:38,788 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-25 23:31:38,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 54 [2022-11-25 23:31:38,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:38,810 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 33 treesize of output 13 [2022-11-25 23:31:38,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:38,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:31:38,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:38,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:38,848 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 71 treesize of output 60 [2022-11-25 23:31:39,014 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 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-25 23:31:39,024 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 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-25 23:31:39,042 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 [2022-11-25 23:31:39,728 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:31:39,728 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 [2022-11-25 23:31:39,741 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 17 treesize of output 19 [2022-11-25 23:31:39,841 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 [2022-11-25 23:31:39,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:31:39,874 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 [2022-11-25 23:31:39,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:31:39,947 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-25 23:31:39,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 48 [2022-11-25 23:31:39,992 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-25 23:31:39,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 48 [2022-11-25 23:31:40,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:31:40,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:31:40,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:31:40,141 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 [2022-11-25 23:31:40,178 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-25 23:31:40,179 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 33 treesize of output 27 [2022-11-25 23:31:40,197 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 [2022-11-25 23:31:40,362 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 20 for LOIs [2022-11-25 23:31:40,364 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:31:48,802 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29011#(and (<= |~#list~0.base| 3) (<= 0 |#NULL.base|) (= |ULTIMATE.start_is_empty_~no_beg~0#1| (ite (and (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_is_empty_~list#1.base|) (+ |ULTIMATE.start_is_empty_~list#1.offset| (* ~unnamed1~0~LIST_BEG 4))) 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_is_empty_~list#1.base|) (+ |ULTIMATE.start_is_empty_~list#1.offset| (* ~unnamed1~0~LIST_BEG 4))) 0)) 1 0)) (= |ULTIMATE.start_is_empty_~list#1.base| |ULTIMATE.start_is_empty_#in~list#1.base|) (<= ~i~0 0) (<= |ULTIMATE.start_main_~z~0#1| 0) (= |ULTIMATE.start_remove_one_#in~list#1.base| |ULTIMATE.start_remove_one_~list#1.base|) (= |ULTIMATE.start_is_empty_~no_end~0#1| (ite (and (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_is_empty_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset|)) 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_is_empty_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset|)) 0)) 1 0)) (<= 0 ~i~0) (= |ULTIMATE.start_remove_one_#in~from#1| |ULTIMATE.start_main_#t~ret27#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_remove_one_#in~from#1| |ULTIMATE.start_remove_one_~from#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start_remove_one_#in~list#1.base| |~#list~0.base|) (<= 0 |ULTIMATE.start_main_~length~0#1|) (<= (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset| 4) (select |#length| |ULTIMATE.start_is_empty_~list#1.base|)) (<= |#NULL.base| 0) (= |~#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_is_empty_~list#1.offset| 0) (<= 0 |~#list~0.offset|) (= |ULTIMATE.start_is_empty_#in~list#1.base| |ULTIMATE.start_remove_one_~list#1.base|) (<= 3 |~#list~0.base|) (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_main_#t~ret27#1|) (= (select |#valid| |ULTIMATE.start_is_empty_~list#1.base|) 1) (<= 0 |#NULL.offset|) (not (= |ULTIMATE.start_is_empty_~no_end~0#1| |ULTIMATE.start_is_empty_~no_beg~0#1|)) (= |ULTIMATE.start_remove_one_~list#1.offset| |ULTIMATE.start_remove_one_#in~list#1.offset|) (<= 0 |#StackHeapBarrier|) (not (< |ULTIMATE.start_is_empty_~list#1.base| |#StackHeapBarrier|)) (<= |~#list~0.offset| 0) (<= 0 |ULTIMATE.start_main_~z~0#1|))' at error location [2022-11-25 23:31:48,802 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:31:48,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:31:48,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 14] total 39 [2022-11-25 23:31:48,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346233420] [2022-11-25 23:31:48,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:31:48,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-25 23:31:48,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:31:48,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-25 23:31:48,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=4040, Unknown=0, NotChecked=0, Total=4422 [2022-11-25 23:31:48,806 INFO L87 Difference]: Start difference. First operand 786 states and 1081 transitions. Second operand has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 39 states have internal predecessors, (90), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 23:32:07,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:07,574 INFO L93 Difference]: Finished difference Result 2702 states and 3563 transitions. [2022-11-25 23:32:07,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-11-25 23:32:07,575 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 39 states have internal predecessors, (90), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 36 [2022-11-25 23:32:07,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:07,591 INFO L225 Difference]: With dead ends: 2702 [2022-11-25 23:32:07,591 INFO L226 Difference]: Without dead ends: 2695 [2022-11-25 23:32:07,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5940 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=2107, Invalid=16525, Unknown=0, NotChecked=0, Total=18632 [2022-11-25 23:32:07,599 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 4202 mSDsluCounter, 4976 mSDsCounter, 0 mSdLazyCounter, 5281 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4203 SdHoareTripleChecker+Valid, 5153 SdHoareTripleChecker+Invalid, 5613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 5281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:32:07,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4203 Valid, 5153 Invalid, 5613 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [332 Valid, 5281 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-11-25 23:32:07,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2022-11-25 23:32:07,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 1496. [2022-11-25 23:32:07,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1343 states have (on average 1.5271779597915116) internal successors, (2051), 1396 states have internal predecessors, (2051), 75 states have call successors, (75), 41 states have call predecessors, (75), 41 states have return successors, (75), 58 states have call predecessors, (75), 75 states have call successors, (75) [2022-11-25 23:32:07,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 2201 transitions. [2022-11-25 23:32:07,659 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 2201 transitions. Word has length 36 [2022-11-25 23:32:07,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:07,659 INFO L495 AbstractCegarLoop]: Abstraction has 1496 states and 2201 transitions. [2022-11-25 23:32:07,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 39 states have internal predecessors, (90), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 23:32:07,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 2201 transitions. [2022-11-25 23:32:07,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-25 23:32:07,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:07,660 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:32:07,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-25 23:32:07,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-25 23:32:07,871 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:32:07,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:07,871 INFO L85 PathProgramCache]: Analyzing trace with hash -93290116, now seen corresponding path program 1 times [2022-11-25 23:32:07,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:07,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266506898] [2022-11-25 23:32:07,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:07,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:07,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:09,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:32:09,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:09,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266506898] [2022-11-25 23:32:09,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266506898] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:32:09,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168813927] [2022-11-25 23:32:09,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:09,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:09,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:32:09,799 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:32:09,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 23:32:09,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:09,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-25 23:32:09,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:32:10,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:32:10,318 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 [2022-11-25 23:32:10,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:10,398 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 29 treesize of output 28 [2022-11-25 23:32:10,606 INFO L321 Elim1Store]: treesize reduction 36, result has 37.9 percent of original size [2022-11-25 23:32:10,606 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 [2022-11-25 23:32:10,609 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 [2022-11-25 23:32:10,617 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:32:10,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:32:10,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168813927] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:32:10,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1807105034] [2022-11-25 23:32:10,781 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-25 23:32:10,781 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:32:10,781 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:32:10,782 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:32:10,782 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:32:10,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:32:10,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:10,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:10,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:10,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:10,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:10,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 38 [2022-11-25 23:32:11,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:32:11,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,020 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 43 treesize of output 41 [2022-11-25 23:32:11,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:32:11,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,040 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 43 treesize of output 41 [2022-11-25 23:32:11,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,065 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 [2022-11-25 23:32:11,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,106 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 [2022-11-25 23:32:11,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,138 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 47 treesize of output 52 [2022-11-25 23:32:11,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,159 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 47 treesize of output 52 [2022-11-25 23:32:11,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,221 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 62 treesize of output 55 [2022-11-25 23:32:11,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-25 23:32:11,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,284 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 62 treesize of output 55 [2022-11-25 23:32:11,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,368 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 69 treesize of output 58 [2022-11-25 23:32:11,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,394 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 58 treesize of output 55 [2022-11-25 23:32:11,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,434 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 [2022-11-25 23:32:11,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:32:11,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:32:11,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 72 [2022-11-25 23:32:11,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:32:11,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:32:11,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 72 [2022-11-25 23:32:11,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,654 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 [2022-11-25 23:32:11,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:11,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:32:11,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:32:11,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 36 [2022-11-25 23:32:12,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:12,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:12,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:12,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:32:12,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:32:12,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 36 [2022-11-25 23:32:12,113 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:32:12,113 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-25 23:32:12,143 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:32:12,143 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 [2022-11-25 23:32:12,230 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 [2022-11-25 23:32:12,239 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 [2022-11-25 23:32:12,248 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 [2022-11-25 23:32:12,271 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 [2022-11-25 23:32:12,293 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-25 23:32:12,293 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 27 treesize of output 34 [2022-11-25 23:32:12,320 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-25 23:32:12,321 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 27 treesize of output 34 [2022-11-25 23:32:12,385 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-25 23:32:12,385 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 50 treesize of output 61 [2022-11-25 23:32:12,443 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-25 23:32:12,444 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 50 treesize of output 61 [2022-11-25 23:32:12,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:32:12,609 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 [2022-11-25 23:32:12,620 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 [2022-11-25 23:32:12,632 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 [2022-11-25 23:32:13,074 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:32:13,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:13,116 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-25 23:32:13,117 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 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-25 23:32:13,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:13,156 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-25 23:32:13,157 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 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-25 23:32:14,312 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:32:14,312 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 [2022-11-25 23:32:14,325 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 17 treesize of output 19 [2022-11-25 23:32:14,404 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 [2022-11-25 23:32:14,411 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 [2022-11-25 23:32:14,421 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 [2022-11-25 23:32:14,442 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 [2022-11-25 23:32:14,465 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-25 23:32:14,466 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 27 treesize of output 34 [2022-11-25 23:32:14,500 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-25 23:32:14,500 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 27 treesize of output 34 [2022-11-25 23:32:14,565 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-25 23:32:14,566 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 50 treesize of output 61 [2022-11-25 23:32:14,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:32:14,639 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-25 23:32:14,639 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 50 treesize of output 61 [2022-11-25 23:32:15,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 23:32:15,144 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 [2022-11-25 23:32:15,155 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 [2022-11-25 23:32:15,473 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 [2022-11-25 23:32:15,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:15,515 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-25 23:32:15,516 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 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-25 23:32:15,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:15,546 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-25 23:32:15,547 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 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-25 23:32:15,937 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:32:15,937 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-25 23:32:15,971 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:32:15,971 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 [2022-11-25 23:32:16,043 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 69 for LOIs [2022-11-25 23:32:16,049 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:32:23,920 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '33544#(and (<= |~#list~0.base| 3) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_append_one_#in~to#1| 2147483647) (<= |ULTIMATE.start_create_item_#in~at#1| 2147483647) (<= ~i~0 0) (<= |ULTIMATE.start_append_one_~to#1| 2147483647) (<= |ULTIMATE.start_main_~z~0#1| 0) (<= |ULTIMATE.start_append_one_~list#1.base| 3) (<= |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) (<= |ULTIMATE.start_main_#t~ret22#1| 2147483647) (<= 0 ~i~0) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= 0 (+ 2147483648 |ULTIMATE.start_append_one_~to#1|)) (<= 0 |ULTIMATE.start_create_item_~head~0#1.offset|) (<= |#NULL.offset| 0) (<= |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|) (<= 3 |ULTIMATE.start_append_one_~list#1.base|) (<= 0 |ULTIMATE.start_create_item_~item~0#1.offset|) (<= 0 (+ |ULTIMATE.start_main_#t~ret22#1| 2147483648)) (<= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_create_item_~at#1| 2147483648)) (<= 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_~head~0#1.offset| 0) (<= 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 [2022-11-25 23:32:23,920 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:32:23,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:32:23,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 29 [2022-11-25 23:32:23,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696760092] [2022-11-25 23:32:23,921 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:32:23,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-25 23:32:23,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:23,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-25 23:32:23,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=2797, Unknown=0, NotChecked=0, Total=3080 [2022-11-25 23:32:23,924 INFO L87 Difference]: Start difference. First operand 1496 states and 2201 transitions. Second operand has 30 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 27 states have internal predecessors, (60), 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) [2022-11-25 23:32:26,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:26,955 INFO L93 Difference]: Finished difference Result 2421 states and 3557 transitions. [2022-11-25 23:32:26,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-25 23:32:26,956 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 27 states have internal predecessors, (60), 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 36 [2022-11-25 23:32:26,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:26,965 INFO L225 Difference]: With dead ends: 2421 [2022-11-25 23:32:26,965 INFO L226 Difference]: Without dead ends: 2421 [2022-11-25 23:32:26,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1764 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=705, Invalid=5457, Unknown=0, NotChecked=0, Total=6162 [2022-11-25 23:32:26,966 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 1273 mSDsluCounter, 1503 mSDsCounter, 0 mSdLazyCounter, 2419 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1277 SdHoareTripleChecker+Valid, 1666 SdHoareTripleChecker+Invalid, 2567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 2419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:32:26,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1277 Valid, 1666 Invalid, 2567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 2419 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-25 23:32:26,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2421 states. [2022-11-25 23:32:27,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2421 to 1628. [2022-11-25 23:32:27,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1628 states, 1458 states have (on average 1.5164609053497942) internal successors, (2211), 1511 states have internal predecessors, (2211), 86 states have call successors, (86), 47 states have call predecessors, (86), 47 states have return successors, (86), 69 states have call predecessors, (86), 86 states have call successors, (86) [2022-11-25 23:32:27,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 2383 transitions. [2022-11-25 23:32:27,010 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 2383 transitions. Word has length 36 [2022-11-25 23:32:27,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:27,010 INFO L495 AbstractCegarLoop]: Abstraction has 1628 states and 2383 transitions. [2022-11-25 23:32:27,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 27 states have internal predecessors, (60), 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) [2022-11-25 23:32:27,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 2383 transitions. [2022-11-25 23:32:27,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-25 23:32:27,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:27,012 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:32:27,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 23:32:27,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:27,217 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:32:27,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:27,217 INFO L85 PathProgramCache]: Analyzing trace with hash -93290115, now seen corresponding path program 1 times [2022-11-25 23:32:27,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:27,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596030041] [2022-11-25 23:32:27,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:27,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:29,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:32:29,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:29,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596030041] [2022-11-25 23:32:29,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596030041] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:32:29,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180953754] [2022-11-25 23:32:29,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:29,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:29,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:32:29,650 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:32:29,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 23:32:29,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:29,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-25 23:32:29,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:32:29,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:32:29,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:32:30,255 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 [2022-11-25 23:32:30,266 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 [2022-11-25 23:32:30,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:30,397 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 [2022-11-25 23:32:30,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:30,403 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 42 treesize of output 33 [2022-11-25 23:32:30,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:30,695 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 18 treesize of output 20 [2022-11-25 23:32:30,703 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 32 treesize of output 14 [2022-11-25 23:32:30,710 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 23:32:30,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-25 23:32:30,716 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 [2022-11-25 23:32:30,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:32:30,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:32:39,514 WARN L233 SmtUtils]: Spent 8.14s 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) [2022-11-25 23:32:45,814 WARN L233 SmtUtils]: Spent 6.14s 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) [2022-11-25 23:32:45,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180953754] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:32:45,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1355789489] [2022-11-25 23:32:45,953 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-25 23:32:45,953 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:32:45,953 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:32:45,953 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:32:45,954 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:32:46,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:32:46,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 38 [2022-11-25 23:32:46,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:32:46,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,205 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 43 treesize of output 41 [2022-11-25 23:32:46,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,223 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 [2022-11-25 23:32:46,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:32:46,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,241 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 43 treesize of output 41 [2022-11-25 23:32:46,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,291 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 [2022-11-25 23:32:46,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,324 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 47 treesize of output 52 [2022-11-25 23:32:46,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,349 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 47 treesize of output 52 [2022-11-25 23:32:46,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-25 23:32:46,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,440 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 62 treesize of output 55 [2022-11-25 23:32:46,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,467 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 62 treesize of output 55 [2022-11-25 23:32:46,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,567 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 [2022-11-25 23:32:46,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,596 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 58 treesize of output 55 [2022-11-25 23:32:46,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,623 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 58 treesize of output 55 [2022-11-25 23:32:46,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,816 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 [2022-11-25 23:32:46,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:32:46,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:32:46,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 72 [2022-11-25 23:32:46,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:32:46,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:46,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:32:46,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 64 [2022-11-25 23:32:47,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:47,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:47,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:47,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:32:47,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:32:47,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 36 [2022-11-25 23:32:47,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:47,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:47,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:47,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:32:47,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:32:47,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 36 [2022-11-25 23:32:47,289 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:32:47,289 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-25 23:32:47,319 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:32:47,319 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 [2022-11-25 23:32:47,433 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 [2022-11-25 23:32:47,445 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 [2022-11-25 23:32:47,455 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 15 treesize of output 11 [2022-11-25 23:32:47,487 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-25 23:32:47,487 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 27 treesize of output 34 [2022-11-25 23:32:47,502 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 [2022-11-25 23:32:47,526 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-25 23:32:47,526 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 27 treesize of output 34 [2022-11-25 23:32:47,591 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-25 23:32:47,592 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 50 treesize of output 61 [2022-11-25 23:32:47,653 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-25 23:32:47,653 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 50 treesize of output 61 [2022-11-25 23:32:47,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:32:47,810 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 [2022-11-25 23:32:47,825 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 15 treesize of output 11 [2022-11-25 23:32:47,837 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 [2022-11-25 23:32:48,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:48,200 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-25 23:32:48,201 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 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-25 23:32:48,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:48,236 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-25 23:32:48,236 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 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-25 23:32:48,253 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 [2022-11-25 23:32:50,853 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:32:50,853 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-25 23:32:50,886 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:32:50,887 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 [2022-11-25 23:32:50,977 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 [2022-11-25 23:32:50,985 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 [2022-11-25 23:32:50,994 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 [2022-11-25 23:32:51,027 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-25 23:32:51,027 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 27 treesize of output 34 [2022-11-25 23:32:51,054 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-25 23:32:51,054 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 27 treesize of output 34 [2022-11-25 23:32:51,067 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 [2022-11-25 23:32:51,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:32:51,148 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-25 23:32:51,148 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 50 treesize of output 61 [2022-11-25 23:32:51,208 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-25 23:32:51,208 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 50 treesize of output 61 [2022-11-25 23:32:51,592 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 [2022-11-25 23:32:51,604 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 [2022-11-25 23:32:51,707 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 [2022-11-25 23:32:51,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:51,998 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-25 23:32:51,998 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 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-25 23:32:52,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:52,037 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-25 23:32:52,037 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 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-25 23:32:52,059 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 [2022-11-25 23:32:52,473 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:32:52,473 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 [2022-11-25 23:32:52,495 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 17 treesize of output 19 [2022-11-25 23:32:52,569 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 69 for LOIs [2022-11-25 23:32:52,574 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:33:01,581 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '37835#(and (<= |~#list~0.base| 3) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_append_one_#in~to#1| 2147483647) (<= |ULTIMATE.start_create_item_#in~at#1| 2147483647) (<= ~i~0 0) (<= |ULTIMATE.start_append_one_~to#1| 2147483647) (<= |ULTIMATE.start_main_~z~0#1| 0) (<= |ULTIMATE.start_append_one_~list#1.base| 3) (<= |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) (<= |ULTIMATE.start_main_#t~ret22#1| 2147483647) (<= 0 ~i~0) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= 0 (+ 2147483648 |ULTIMATE.start_append_one_~to#1|)) (<= 0 |ULTIMATE.start_create_item_~head~0#1.offset|) (<= |#NULL.offset| 0) (<= |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|) (<= 3 |ULTIMATE.start_append_one_~list#1.base|) (<= 0 |ULTIMATE.start_create_item_~item~0#1.offset|) (<= 0 (+ |ULTIMATE.start_main_#t~ret22#1| 2147483648)) (<= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_create_item_~at#1| 2147483648)) (<= 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_~head~0#1.offset| 0) (<= 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 [2022-11-25 23:33:01,581 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:33:01,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:33:01,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 34 [2022-11-25 23:33:01,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717971360] [2022-11-25 23:33:01,581 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:33:01,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 23:33:01,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:33:01,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 23:33:01,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=3734, Unknown=0, NotChecked=0, Total=4032 [2022-11-25 23:33:01,585 INFO L87 Difference]: Start difference. First operand 1628 states and 2383 transitions. Second operand has 35 states, 31 states have (on average 2.064516129032258) internal successors, (64), 32 states have internal predecessors, (64), 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) [2022-11-25 23:33:16,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:33:16,732 INFO L93 Difference]: Finished difference Result 3660 states and 5205 transitions. [2022-11-25 23:33:16,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-11-25 23:33:16,733 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 31 states have (on average 2.064516129032258) internal successors, (64), 32 states have internal predecessors, (64), 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 36 [2022-11-25 23:33:16,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:33:16,744 INFO L225 Difference]: With dead ends: 3660 [2022-11-25 23:33:16,744 INFO L226 Difference]: Without dead ends: 3660 [2022-11-25 23:33:16,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5896 ImplicationChecksByTransitivity, 35.2s TimeCoverageRelationStatistics Valid=2394, Invalid=16512, Unknown=0, NotChecked=0, Total=18906 [2022-11-25 23:33:16,748 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 6499 mSDsluCounter, 3194 mSDsCounter, 0 mSdLazyCounter, 4802 mSolverCounterSat, 602 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6502 SdHoareTripleChecker+Valid, 3366 SdHoareTripleChecker+Invalid, 5404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 4802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:33:16,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6502 Valid, 3366 Invalid, 5404 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [602 Valid, 4802 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-25 23:33:16,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3660 states. [2022-11-25 23:33:16,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3660 to 1818. [2022-11-25 23:33:16,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1629 states have (on average 1.5187231430325352) internal successors, (2474), 1686 states have internal predecessors, (2474), 98 states have call successors, (98), 54 states have call predecessors, (98), 54 states have return successors, (98), 77 states have call predecessors, (98), 98 states have call successors, (98) [2022-11-25 23:33:16,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 2670 transitions. [2022-11-25 23:33:16,803 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 2670 transitions. Word has length 36 [2022-11-25 23:33:16,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:33:16,804 INFO L495 AbstractCegarLoop]: Abstraction has 1818 states and 2670 transitions. [2022-11-25 23:33:16,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 31 states have (on average 2.064516129032258) internal successors, (64), 32 states have internal predecessors, (64), 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) [2022-11-25 23:33:16,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 2670 transitions. [2022-11-25 23:33:16,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-25 23:33:16,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:33:16,805 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] [2022-11-25 23:33:16,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-25 23:33:17,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:17,011 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:33:17,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:33:17,011 INFO L85 PathProgramCache]: Analyzing trace with hash -729963439, now seen corresponding path program 1 times [2022-11-25 23:33:17,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:33:17,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79084118] [2022-11-25 23:33:17,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:17,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:33:17,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:18,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:33:18,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:33:18,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79084118] [2022-11-25 23:33:18,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79084118] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:33:18,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024737725] [2022-11-25 23:33:18,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:18,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:18,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:33:18,718 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:33:18,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 23:33:18,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:18,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-25 23:33:18,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:33:19,043 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 23:33:19,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-25 23:33:19,116 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 14 treesize of output 16 [2022-11-25 23:33:19,138 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 14 treesize of output 16 [2022-11-25 23:33:19,157 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 14 treesize of output 16 [2022-11-25 23:33:19,345 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-25 23:33:19,345 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 30 [2022-11-25 23:33:20,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:33:20,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:33:20,093 INFO L321 Elim1Store]: treesize reduction 31, result has 38.0 percent of original size [2022-11-25 23:33:20,093 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 66 [2022-11-25 23:33:20,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:33:20,115 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 48 treesize of output 39 [2022-11-25 23:33:20,589 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:33:20,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2022-11-25 23:33:20,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:33:20,605 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:33:20,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 61 [2022-11-25 23:33:20,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:33:20,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:33:21,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:33:21,838 INFO L321 Elim1Store]: treesize reduction 12, result has 83.6 percent of original size [2022-11-25 23:33:21,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 185 treesize of output 213 [2022-11-25 23:33:35,051 WARN L233 SmtUtils]: Spent 6.30s on a formula simplification. DAG size of input: 61 DAG size of output: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:33:37,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024737725] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:33:37,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [489215016] [2022-11-25 23:33:37,325 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-25 23:33:37,325 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:33:37,325 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:33:37,325 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:33:37,326 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:33:37,964 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:33:37,964 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-25 23:33:37,999 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:33:37,999 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 [2022-11-25 23:33:38,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:33:38,083 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 [2022-11-25 23:33:38,096 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 [2022-11-25 23:33:38,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:33:38,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:33:38,156 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 40 [2022-11-25 23:33:38,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:33:38,172 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 40 [2022-11-25 23:33:38,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:33:38,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:33:38,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:33:38,211 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 53 treesize of output 43 [2022-11-25 23:33:38,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:33:38,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:33:38,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:33:38,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:33:38,253 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 53 treesize of output 43 [2022-11-25 23:33:38,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:33:38,316 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 49 treesize of output 43 [2022-11-25 23:33:38,333 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 33 treesize of output 13 [2022-11-25 23:33:38,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:33:38,360 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 49 treesize of output 43 [2022-11-25 23:33:38,511 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 33 treesize of output 13 [2022-11-25 23:33:38,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:33:38,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:33:38,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:33:38,535 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 85 treesize of output 74 [2022-11-25 23:33:38,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:33:38,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:33:38,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:33:38,556 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 85 treesize of output 74 [2022-11-25 23:33:39,486 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:33:39,487 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-25 23:33:39,526 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:33:39,526 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 [2022-11-25 23:33:39,643 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 [2022-11-25 23:33:39,656 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 [2022-11-25 23:33:39,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:33:39,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:33:39,727 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 40 [2022-11-25 23:33:39,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:33:39,746 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 40 [2022-11-25 23:33:39,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:33:39,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:33:39,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:33:39,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:33:39,819 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 53 treesize of output 43 [2022-11-25 23:33:39,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:33:39,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:33:39,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:33:39,848 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 53 treesize of output 43 [2022-11-25 23:33:39,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:33:39,960 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 33 treesize of output 13 [2022-11-25 23:33:39,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:33:39,991 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 49 treesize of output 43 [2022-11-25 23:33:40,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:33:40,023 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 49 treesize of output 43 [2022-11-25 23:33:40,117 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 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-25 23:33:40,132 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 [2022-11-25 23:33:40,143 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 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-25 23:33:41,233 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:33:41,233 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 [2022-11-25 23:33:41,273 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 17 treesize of output 19 [2022-11-25 23:33:41,362 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 [2022-11-25 23:33:41,383 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 [2022-11-25 23:33:41,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:33:41,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:33:41,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:33:41,490 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 40 [2022-11-25 23:33:41,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:33:41,507 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 40 [2022-11-25 23:33:41,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:33:41,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:33:41,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:33:41,570 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 53 treesize of output 43 [2022-11-25 23:33:41,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:33:41,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:33:41,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:33:41,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:33:41,603 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 53 treesize of output 43 [2022-11-25 23:33:41,684 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 33 treesize of output 13 [2022-11-25 23:33:41,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:33:41,702 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 49 treesize of output 43 [2022-11-25 23:33:41,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:33:41,734 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 49 treesize of output 43 [2022-11-25 23:33:41,808 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 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-25 23:33:41,826 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 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-25 23:33:41,838 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 [2022-11-25 23:33:42,692 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:33:42,693 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-25 23:33:42,730 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:33:42,730 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 [2022-11-25 23:33:42,827 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 [2022-11-25 23:33:42,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:33:42,852 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 [2022-11-25 23:33:42,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:33:42,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:33:42,899 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 40 [2022-11-25 23:33:42,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:33:42,915 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 40 [2022-11-25 23:33:42,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:33:42,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:33:42,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:33:43,068 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-25 23:33:43,069 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 33 treesize of output 27 [2022-11-25 23:33:43,090 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 [2022-11-25 23:33:43,103 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 [2022-11-25 23:33:43,140 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 15 for LOIs [2022-11-25 23:33:43,142 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:33:51,631 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '43721#(and (= |~#list~0.offset| 0) (not (< |ULTIMATE.start_main_~cursor~0#1.base| |#StackHeapBarrier|)) (= (select |#valid| |~#list~0.base|) 1) (= |ULTIMATE.start_main_~next~1#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~cursor~0#1.base|) (+ (* 4 |ULTIMATE.start_main_~direction~0#1|) |ULTIMATE.start_main_~cursor~0#1.offset|))) (= (select (select |#memory_$Pointer$.offset| |~#list~0.base|) (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset|)) |ULTIMATE.start_main_~cursor~0#1.offset|) (= 3 |~#list~0.base|) (<= 0 ~i~0) (<= (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset| 4) (select |#length| |~#list~0.base|)) (< 0 |ULTIMATE.start_main_~length~0#1|) (= 0 |ULTIMATE.start_main_~cursor~0#1.offset|) (= |ULTIMATE.start_main_~y~0#1| 0) (or (and (= ~unnamed2~0~ITEM_NEXT |ULTIMATE.start_main_~direction~0#1|) (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_main_~end_point~0#1|)) (and (= ~unnamed2~0~ITEM_PREV |ULTIMATE.start_main_~direction~0#1|) (= ~unnamed1~0~LIST_END |ULTIMATE.start_main_~end_point~0#1|))) (= (select |#valid| |ULTIMATE.start_main_~cursor~0#1.base|) 1) (<= (+ (* 4 |ULTIMATE.start_main_~direction~0#1|) 4 |ULTIMATE.start_main_~cursor~0#1.offset|) (select |#length| |ULTIMATE.start_main_~cursor~0#1.base|)) (= |ULTIMATE.start_main_~z~0#1| 0) (= |ULTIMATE.start_main_~next~1#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~cursor~0#1.base|) (+ (* 4 |ULTIMATE.start_main_~direction~0#1|) |ULTIMATE.start_main_~cursor~0#1.offset|))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.base| |~#list~0.base|) (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset|)) |ULTIMATE.start_main_~cursor~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-25 23:33:51,631 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:33:51,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:33:51,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2022-11-25 23:33:51,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110367408] [2022-11-25 23:33:51,631 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:33:51,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-25 23:33:51,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:33:51,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-25 23:33:51,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=4375, Unknown=3, NotChecked=0, Total=4692 [2022-11-25 23:33:51,633 INFO L87 Difference]: Start difference. First operand 1818 states and 2670 transitions. Second operand has 29 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 29 states have internal predecessors, (68), 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) [2022-11-25 23:34:03,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:34:03,463 INFO L93 Difference]: Finished difference Result 3529 states and 5085 transitions. [2022-11-25 23:34:03,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-25 23:34:03,464 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 29 states have internal predecessors, (68), 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 36 [2022-11-25 23:34:03,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:34:03,475 INFO L225 Difference]: With dead ends: 3529 [2022-11-25 23:34:03,475 INFO L226 Difference]: Without dead ends: 3529 [2022-11-25 23:34:03,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3317 ImplicationChecksByTransitivity, 31.8s TimeCoverageRelationStatistics Valid=1208, Invalid=10779, Unknown=3, NotChecked=0, Total=11990 [2022-11-25 23:34:03,477 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 2303 mSDsluCounter, 2502 mSDsCounter, 0 mSdLazyCounter, 3134 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2303 SdHoareTripleChecker+Valid, 2621 SdHoareTripleChecker+Invalid, 3302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 3134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:34:03,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2303 Valid, 2621 Invalid, 3302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 3134 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-25 23:34:03,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3529 states. [2022-11-25 23:34:03,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3529 to 2295. [2022-11-25 23:34:03,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2295 states, 2061 states have (on average 1.522561863173217) internal successors, (3138), 2131 states have internal predecessors, (3138), 127 states have call successors, (127), 70 states have call predecessors, (127), 70 states have return successors, (127), 93 states have call predecessors, (127), 127 states have call successors, (127) [2022-11-25 23:34:03,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2295 states to 2295 states and 3392 transitions. [2022-11-25 23:34:03,537 INFO L78 Accepts]: Start accepts. Automaton has 2295 states and 3392 transitions. Word has length 36 [2022-11-25 23:34:03,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:34:03,538 INFO L495 AbstractCegarLoop]: Abstraction has 2295 states and 3392 transitions. [2022-11-25 23:34:03,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 29 states have internal predecessors, (68), 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) [2022-11-25 23:34:03,538 INFO L276 IsEmpty]: Start isEmpty. Operand 2295 states and 3392 transitions. [2022-11-25 23:34:03,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-25 23:34:03,539 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:34:03,539 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] [2022-11-25 23:34:03,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-25 23:34:03,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-25 23:34:03,745 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:34:03,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:34:03,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1726358473, now seen corresponding path program 1 times [2022-11-25 23:34:03,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:34:03,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26262089] [2022-11-25 23:34:03,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:34:03,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:34:03,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:34:04,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:34:04,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:34:04,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26262089] [2022-11-25 23:34:04,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26262089] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:34:04,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:34:04,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 23:34:04,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458662802] [2022-11-25 23:34:04,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:34:04,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:34:04,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:34:04,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:34:04,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:34:04,019 INFO L87 Difference]: Start difference. First operand 2295 states and 3392 transitions. Second operand has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 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) [2022-11-25 23:34:04,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:34:04,325 INFO L93 Difference]: Finished difference Result 2467 states and 3545 transitions. [2022-11-25 23:34:04,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:34:04,331 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 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 37 [2022-11-25 23:34:04,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:34:04,354 INFO L225 Difference]: With dead ends: 2467 [2022-11-25 23:34:04,354 INFO L226 Difference]: Without dead ends: 2467 [2022-11-25 23:34:04,354 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 [2022-11-25 23:34:04,355 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 450 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:34:04,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 186 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:34:04,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2467 states. [2022-11-25 23:34:04,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2467 to 2293. [2022-11-25 23:34:04,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2293 states, 2061 states have (on average 1.490538573508006) internal successors, (3072), 2129 states have internal predecessors, (3072), 127 states have call successors, (127), 70 states have call predecessors, (127), 70 states have return successors, (127), 93 states have call predecessors, (127), 127 states have call successors, (127) [2022-11-25 23:34:04,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2293 states to 2293 states and 3326 transitions. [2022-11-25 23:34:04,429 INFO L78 Accepts]: Start accepts. Automaton has 2293 states and 3326 transitions. Word has length 37 [2022-11-25 23:34:04,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:34:04,429 INFO L495 AbstractCegarLoop]: Abstraction has 2293 states and 3326 transitions. [2022-11-25 23:34:04,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 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) [2022-11-25 23:34:04,430 INFO L276 IsEmpty]: Start isEmpty. Operand 2293 states and 3326 transitions. [2022-11-25 23:34:04,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-25 23:34:04,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:34:04,431 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:34:04,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-11-25 23:34:04,432 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:34:04,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:34:04,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1390699727, now seen corresponding path program 2 times [2022-11-25 23:34:04,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:34:04,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593189342] [2022-11-25 23:34:04,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:34:04,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:34:04,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:34:04,528 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:34:04,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:34:04,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593189342] [2022-11-25 23:34:04,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593189342] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:34:04,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207754065] [2022-11-25 23:34:04,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:34:04,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:34:04,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:34:04,529 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:34:04,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 23:34:04,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-25 23:34:04,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:34:04,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-25 23:34:04,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:34:05,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:34:05,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:34:05,227 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:34:05,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 127 treesize of output 123 [2022-11-25 23:34:05,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:34:05,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:34:05,250 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:34:05,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 91 [2022-11-25 23:34:05,444 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 23:34:05,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:34:05,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207754065] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:34:05,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:34:05,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 14 [2022-11-25 23:34:05,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834569513] [2022-11-25 23:34:05,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:34:05,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 23:34:05,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:34:05,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 23:34:05,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-11-25 23:34:05,445 INFO L87 Difference]: Start difference. First operand 2293 states and 3326 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 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) [2022-11-25 23:34:06,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:34:06,085 INFO L93 Difference]: Finished difference Result 2318 states and 3350 transitions. [2022-11-25 23:34:06,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 23:34:06,085 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 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 [2022-11-25 23:34:06,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:34:06,091 INFO L225 Difference]: With dead ends: 2318 [2022-11-25 23:34:06,091 INFO L226 Difference]: Without dead ends: 2316 [2022-11-25 23:34:06,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-11-25 23:34:06,092 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 131 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:34:06,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 450 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:34:06,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2022-11-25 23:34:06,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 2213. [2022-11-25 23:34:06,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2213 states, 1990 states have (on average 1.4944723618090452) internal successors, (2974), 2055 states have internal predecessors, (2974), 121 states have call successors, (121), 67 states have call predecessors, (121), 67 states have return successors, (121), 90 states have call predecessors, (121), 121 states have call successors, (121) [2022-11-25 23:34:06,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2213 states to 2213 states and 3216 transitions. [2022-11-25 23:34:06,135 INFO L78 Accepts]: Start accepts. Automaton has 2213 states and 3216 transitions. Word has length 37 [2022-11-25 23:34:06,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:34:06,136 INFO L495 AbstractCegarLoop]: Abstraction has 2213 states and 3216 transitions. [2022-11-25 23:34:06,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 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) [2022-11-25 23:34:06,136 INFO L276 IsEmpty]: Start isEmpty. Operand 2213 states and 3216 transitions. [2022-11-25 23:34:06,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-25 23:34:06,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:34:06,137 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] [2022-11-25 23:34:06,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 23:34:06,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-25 23:34:06,341 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:34:06,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:34:06,341 INFO L85 PathProgramCache]: Analyzing trace with hash -921102663, now seen corresponding path program 1 times [2022-11-25 23:34:06,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:34:06,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025104692] [2022-11-25 23:34:06,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:34:06,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:34:06,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:34:08,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:34:08,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:34:08,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025104692] [2022-11-25 23:34:08,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025104692] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:34:08,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003927625] [2022-11-25 23:34:08,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:34:08,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:34:08,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:34:08,135 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:34:08,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 23:34:08,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:34:08,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-25 23:34:08,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:34:08,799 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 [2022-11-25 23:34:08,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:34:08,945 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 51 treesize of output 34 [2022-11-25 23:34:09,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:34:09,228 INFO L321 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2022-11-25 23:34:09,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 21 [2022-11-25 23:34:09,272 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 13 treesize of output 9 [2022-11-25 23:34:09,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:34:09,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:34:09,609 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 150 treesize of output 142 [2022-11-25 23:34:09,718 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 134 treesize of output 126 [2022-11-25 23:36:29,701 WARN L233 SmtUtils]: Spent 2.33m on a formula simplification. DAG size of input: 71 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:37:21,923 WARN L233 SmtUtils]: Spent 48.10s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:38:16,061 WARN L233 SmtUtils]: Spent 47.98s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:38:48,466 WARN L233 SmtUtils]: Spent 32.09s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:38:56,636 WARN L233 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:38:58,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003927625] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:38:58,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1258808045] [2022-11-25 23:38:58,759 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-25 23:38:58,759 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:38:58,760 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:38:58,760 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:38:58,760 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:38:59,371 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:38:59,371 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 [2022-11-25 23:38:59,382 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 17 treesize of output 19 [2022-11-25 23:38:59,456 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 [2022-11-25 23:38:59,469 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 [2022-11-25 23:38:59,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:38:59,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:38:59,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:38:59,549 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 40 [2022-11-25 23:38:59,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:38:59,573 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 40 [2022-11-25 23:38:59,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:38:59,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:38:59,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:38:59,618 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 53 treesize of output 43 [2022-11-25 23:38:59,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:38:59,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:38:59,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:38:59,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:38:59,676 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 53 treesize of output 43 [2022-11-25 23:38:59,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:38:59,759 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 49 treesize of output 43 [2022-11-25 23:38:59,779 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 33 treesize of output 13 [2022-11-25 23:38:59,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:38:59,797 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 49 treesize of output 43 [2022-11-25 23:38:59,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-25 23:38:59,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:38:59,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:38:59,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:38:59,959 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 85 treesize of output 74 [2022-11-25 23:38:59,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:38:59,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:38:59,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:38:59,985 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 85 treesize of output 74 [2022-11-25 23:39:00,911 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:39:00,911 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-25 23:39:00,982 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:39:00,983 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 [2022-11-25 23:39:01,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-11-25 23:39:01,170 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 [2022-11-25 23:39:01,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:39:01,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:01,227 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 40 [2022-11-25 23:39:01,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:01,247 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 40 [2022-11-25 23:39:01,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:39:01,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:39:01,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:01,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:01,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:01,368 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 53 treesize of output 43 [2022-11-25 23:39:01,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:01,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:01,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:01,390 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 53 treesize of output 43 [2022-11-25 23:39:01,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:01,477 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 49 treesize of output 43 [2022-11-25 23:39:01,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:01,510 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 49 treesize of output 43 [2022-11-25 23:39:01,532 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 33 treesize of output 13 [2022-11-25 23:39:01,621 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 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-25 23:39:01,639 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 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-25 23:39:01,652 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 [2022-11-25 23:39:02,712 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:39:02,712 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 [2022-11-25 23:39:02,724 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 17 treesize of output 19 [2022-11-25 23:39:02,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:39:02,827 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 [2022-11-25 23:39:02,848 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 [2022-11-25 23:39:02,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:02,885 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 40 [2022-11-25 23:39:02,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:39:02,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:02,934 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 40 [2022-11-25 23:39:02,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:39:03,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:03,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:03,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:03,005 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 53 treesize of output 43 [2022-11-25 23:39:03,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:03,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:03,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:03,027 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 53 treesize of output 43 [2022-11-25 23:39:03,125 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 33 treesize of output 13 [2022-11-25 23:39:03,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:03,145 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 49 treesize of output 43 [2022-11-25 23:39:03,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:03,167 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 49 treesize of output 43 [2022-11-25 23:39:03,249 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 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-25 23:39:03,262 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 23 treesize of output 1 [2022-11-25 23:39:03,275 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 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-25 23:39:03,968 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-11-25 23:39:03,968 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 33 treesize of output 37 [2022-11-25 23:39:04,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-25 23:39:04,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-25 23:39:04,237 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:39:04,237 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-25 23:39:04,271 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:39:04,271 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 [2022-11-25 23:39:04,345 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 [2022-11-25 23:39:04,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:39:04,378 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 [2022-11-25 23:39:04,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:04,421 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 40 [2022-11-25 23:39:04,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:39:04,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:04,451 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 40 [2022-11-25 23:39:04,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:39:04,509 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 19 treesize of output 1 [2022-11-25 23:39:04,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:39:04,555 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 [2022-11-25 23:39:04,594 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-25 23:39:04,594 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 33 treesize of output 27 [2022-11-25 23:39:04,608 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 [2022-11-25 23:39:04,646 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 15 for LOIs [2022-11-25 23:39:04,647 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:39:11,925 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '59338#(and (= |~#list~0.offset| 0) (= 3 |~#list~0.base|) (<= 0 ~i~0) (not (< 0 |ULTIMATE.start_main_~length~0#1|)) (<= 0 (+ |ULTIMATE.start_main_~length~0#1| 1)) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= |ULTIMATE.start_main_~y~0#1| 0) (= |ULTIMATE.start_main_~z~0#1| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-11-25 23:39:11,925 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:39:11,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:39:11,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2022-11-25 23:39:11,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645903761] [2022-11-25 23:39:11,926 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:39:11,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-25 23:39:11,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:39:11,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-25 23:39:11,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=3848, Unknown=6, NotChecked=0, Total=4160 [2022-11-25 23:39:11,928 INFO L87 Difference]: Start difference. First operand 2213 states and 3216 transitions. Second operand has 28 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 26 states have internal predecessors, (70), 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) [2022-11-25 23:39:15,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:39:15,139 INFO L93 Difference]: Finished difference Result 2335 states and 3366 transitions. [2022-11-25 23:39:15,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 23:39:15,145 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 26 states have internal predecessors, (70), 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 39 [2022-11-25 23:39:15,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:39:15,150 INFO L225 Difference]: With dead ends: 2335 [2022-11-25 23:39:15,150 INFO L226 Difference]: Without dead ends: 2334 [2022-11-25 23:39:15,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1816 ImplicationChecksByTransitivity, 298.4s TimeCoverageRelationStatistics Valid=557, Invalid=5443, Unknown=6, NotChecked=0, Total=6006 [2022-11-25 23:39:15,152 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 1286 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1288 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 1573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:39:15,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1288 Valid, 987 Invalid, 1573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1475 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-25 23:39:15,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2334 states. [2022-11-25 23:39:15,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2334 to 2219. [2022-11-25 23:39:15,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2219 states, 1996 states have (on average 1.4934869739478958) internal successors, (2981), 2061 states have internal predecessors, (2981), 121 states have call successors, (121), 67 states have call predecessors, (121), 67 states have return successors, (121), 90 states have call predecessors, (121), 121 states have call successors, (121) [2022-11-25 23:39:15,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2219 states to 2219 states and 3223 transitions. [2022-11-25 23:39:15,191 INFO L78 Accepts]: Start accepts. Automaton has 2219 states and 3223 transitions. Word has length 39 [2022-11-25 23:39:15,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:39:15,191 INFO L495 AbstractCegarLoop]: Abstraction has 2219 states and 3223 transitions. [2022-11-25 23:39:15,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 26 states have internal predecessors, (70), 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) [2022-11-25 23:39:15,192 INFO L276 IsEmpty]: Start isEmpty. Operand 2219 states and 3223 transitions. [2022-11-25 23:39:15,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-25 23:39:15,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:39:15,193 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:39:15,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 23:39:15,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-25 23:39:15,399 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:39:15,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:39:15,399 INFO L85 PathProgramCache]: Analyzing trace with hash -921103948, now seen corresponding path program 1 times [2022-11-25 23:39:15,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:39:15,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095626285] [2022-11-25 23:39:15,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:39:15,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:39:15,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:39:15,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:39:15,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:39:15,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095626285] [2022-11-25 23:39:15,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095626285] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:39:15,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152834533] [2022-11-25 23:39:15,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:39:15,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:39:15,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:39:15,483 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:39:15,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 23:39:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:39:15,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 23:39:15,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:39:15,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:39:15,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:39:15,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:39:15,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152834533] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:39:15,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [446096965] [2022-11-25 23:39:15,796 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-25 23:39:15,797 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:39:15,797 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:39:15,797 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:39:15,797 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:39:16,423 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:39:16,423 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 [2022-11-25 23:39:16,437 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 17 treesize of output 19 [2022-11-25 23:39:16,512 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 [2022-11-25 23:39:16,532 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 [2022-11-25 23:39:16,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:39:16,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:16,576 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 40 [2022-11-25 23:39:16,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:16,600 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 40 [2022-11-25 23:39:16,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:39:16,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:39:16,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:16,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:16,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:16,677 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 53 treesize of output 43 [2022-11-25 23:39:16,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:16,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:16,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:16,721 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 53 treesize of output 43 [2022-11-25 23:39:16,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:16,797 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 49 treesize of output 43 [2022-11-25 23:39:16,820 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 33 treesize of output 13 [2022-11-25 23:39:16,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:16,846 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 49 treesize of output 43 [2022-11-25 23:39:16,981 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 33 treesize of output 13 [2022-11-25 23:39:17,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:17,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:39:17,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:17,012 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 85 treesize of output 74 [2022-11-25 23:39:17,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:17,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:39:17,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:17,035 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 85 treesize of output 74 [2022-11-25 23:39:17,884 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:39:17,885 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-25 23:39:17,920 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:39:17,921 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 [2022-11-25 23:39:17,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:39:18,011 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 [2022-11-25 23:39:18,025 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 [2022-11-25 23:39:18,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:18,069 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 40 [2022-11-25 23:39:18,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:39:18,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:18,100 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 40 [2022-11-25 23:39:18,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:18,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:18,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:18,152 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 53 treesize of output 43 [2022-11-25 23:39:18,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:39:18,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:18,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:18,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:18,198 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 53 treesize of output 43 [2022-11-25 23:39:18,304 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 33 treesize of output 13 [2022-11-25 23:39:18,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:18,328 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 49 treesize of output 43 [2022-11-25 23:39:18,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:18,351 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 49 treesize of output 43 [2022-11-25 23:39:18,448 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 [2022-11-25 23:39:18,463 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 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-25 23:39:18,476 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 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-25 23:39:19,557 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:39:19,558 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 [2022-11-25 23:39:19,571 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 17 treesize of output 19 [2022-11-25 23:39:19,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:39:19,680 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 [2022-11-25 23:39:19,696 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 [2022-11-25 23:39:19,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:19,731 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 40 [2022-11-25 23:39:19,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:39:19,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:19,782 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 40 [2022-11-25 23:39:19,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:19,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:19,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:19,822 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 53 treesize of output 43 [2022-11-25 23:39:19,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:39:19,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:19,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:19,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:19,894 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 53 treesize of output 43 [2022-11-25 23:39:19,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:19,984 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 49 treesize of output 43 [2022-11-25 23:39:20,002 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 33 treesize of output 13 [2022-11-25 23:39:20,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:20,021 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 49 treesize of output 43 [2022-11-25 23:39:20,102 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 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-25 23:39:20,112 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 [2022-11-25 23:39:20,124 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 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-25 23:39:20,831 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-11-25 23:39:20,831 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 33 treesize of output 37 [2022-11-25 23:39:20,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-25 23:39:20,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-25 23:39:21,064 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:39:21,064 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-25 23:39:21,096 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:39:21,097 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 [2022-11-25 23:39:21,179 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 [2022-11-25 23:39:21,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:39:21,205 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 [2022-11-25 23:39:21,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:39:21,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:21,252 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 40 [2022-11-25 23:39:21,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:21,275 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 40 [2022-11-25 23:39:21,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:39:21,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:39:21,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:39:21,386 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 [2022-11-25 23:39:21,398 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 [2022-11-25 23:39:21,438 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-25 23:39:21,439 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 33 treesize of output 27 [2022-11-25 23:39:21,476 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 15 for LOIs [2022-11-25 23:39:21,477 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:39:26,303 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '64178#(and (= |~#list~0.offset| 0) (= 3 |~#list~0.base|) (<= 0 ~i~0) (not (= (select |#valid| |ULTIMATE.start_main_~cursor~0#1.base|) 1)) (= |ULTIMATE.start_main_~y~0#1| 0) (<= 0 |ULTIMATE.start_main_~length~0#1|) (= |ULTIMATE.start_main_~z~0#1| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:39:26,303 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:39:26,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:39:26,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-11-25 23:39:26,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099904199] [2022-11-25 23:39:26,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:39:26,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:39:26,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:39:26,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:39:26,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2022-11-25 23:39:26,304 INFO L87 Difference]: Start difference. First operand 2219 states and 3223 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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) [2022-11-25 23:39:26,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:39:26,459 INFO L93 Difference]: Finished difference Result 3876 states and 5664 transitions. [2022-11-25 23:39:26,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:39:26,460 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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 [2022-11-25 23:39:26,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:39:26,466 INFO L225 Difference]: With dead ends: 3876 [2022-11-25 23:39:26,466 INFO L226 Difference]: Without dead ends: 3868 [2022-11-25 23:39:26,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 87 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2022-11-25 23:39:26,467 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 313 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:39:26,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 409 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:39:26,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3868 states. [2022-11-25 23:39:26,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3868 to 3013. [2022-11-25 23:39:26,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3013 states, 2745 states have (on average 1.5074681238615666) internal successors, (4138), 2818 states have internal predecessors, (4138), 166 states have call successors, (166), 67 states have call predecessors, (166), 67 states have return successors, (166), 127 states have call predecessors, (166), 166 states have call successors, (166) [2022-11-25 23:39:26,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 4470 transitions. [2022-11-25 23:39:26,515 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 4470 transitions. Word has length 39 [2022-11-25 23:39:26,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:39:26,516 INFO L495 AbstractCegarLoop]: Abstraction has 3013 states and 4470 transitions. [2022-11-25 23:39:26,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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) [2022-11-25 23:39:26,516 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 4470 transitions. [2022-11-25 23:39:26,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-25 23:39:26,517 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:39:26,517 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] [2022-11-25 23:39:26,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 23:39:26,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:39:26,728 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:39:26,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:39:26,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1576652340, now seen corresponding path program 1 times [2022-11-25 23:39:26,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:39:26,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694517620] [2022-11-25 23:39:26,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:39:26,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:39:26,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:39:26,842 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 23:39:26,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:39:26,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694517620] [2022-11-25 23:39:26,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694517620] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:39:26,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694044400] [2022-11-25 23:39:26,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:39:26,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:39:26,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:39:26,847 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:39:26,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 23:39:27,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:39:27,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 23:39:27,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:39:27,171 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:39:27,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:39:27,195 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-25 23:39:27,195 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 [2022-11-25 23:39:27,221 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 23:39:27,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694044400] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:39:27,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1168060097] [2022-11-25 23:39:27,223 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2022-11-25 23:39:27,223 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:39:27,224 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:39:27,224 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:39:27,224 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:39:27,940 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-11-25 23:39:27,941 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 [2022-11-25 23:39:28,109 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-11-25 23:39:28,109 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 [2022-11-25 23:39:28,437 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 27 for LOIs [2022-11-25 23:39:28,441 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:39:34,818 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '71345#(and (= |~#list~0.offset| 0) (<= |ULTIMATE.start_is_empty_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_is_empty_#in~list#1.offset|) (<= 3 |ULTIMATE.start_is_empty_#in~list#1.base|) (= 3 |~#list~0.base|) (<= 0 ~i~0) (<= |ULTIMATE.start_remove_one_#in~list#1.base| 3) (<= 0 (+ |ULTIMATE.start_main_#t~ret27#1| 2147483648)) (not (= (select |#valid| |ULTIMATE.start_is_empty_~list#1.base|) 1)) (<= 3 |ULTIMATE.start_is_empty_~list#1.base|) (= |ULTIMATE.start_main_~y~0#1| 0) (<= |ULTIMATE.start_is_empty_#in~list#1.base| 3) (<= 0 |ULTIMATE.start_remove_one_~list#1.offset|) (<= |ULTIMATE.start_is_empty_~list#1.offset| 0) (<= 0 (+ |ULTIMATE.start_remove_one_~from#1| 2147483648)) (<= |ULTIMATE.start_remove_one_~from#1| 2147483647) (<= 3 |ULTIMATE.start_remove_one_#in~list#1.base|) (<= |ULTIMATE.start_main_#t~ret27#1| 2147483647) (<= |ULTIMATE.start_remove_one_~list#1.base| 3) (= |ULTIMATE.start_main_~z~0#1| 0) (<= 0 (+ |ULTIMATE.start_remove_one_#in~from#1| 2147483648)) (<= 0 |ULTIMATE.start_remove_one_#in~list#1.offset|) (<= |ULTIMATE.start_remove_one_#in~from#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_is_empty_~list#1.offset|) (<= 3 |ULTIMATE.start_remove_one_~list#1.base|) (<= |ULTIMATE.start_is_empty_~list#1.base| 3) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_remove_one_#in~list#1.offset| 0) (= |ULTIMATE.start_main_~length~0#1| 0) (<= |ULTIMATE.start_remove_one_~list#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-25 23:39:34,818 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:39:34,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:39:34,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-25 23:39:34,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369263] [2022-11-25 23:39:34,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:39:34,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 23:39:34,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:39:34,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 23:39:34,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=818, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 23:39:34,820 INFO L87 Difference]: Start difference. First operand 3013 states and 4470 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) [2022-11-25 23:39:35,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:39:35,853 INFO L93 Difference]: Finished difference Result 9214 states and 13357 transitions. [2022-11-25 23:39:35,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 23:39:35,854 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 [2022-11-25 23:39:35,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:39:35,875 INFO L225 Difference]: With dead ends: 9214 [2022-11-25 23:39:35,875 INFO L226 Difference]: Without dead ends: 9214 [2022-11-25 23:39:35,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 91 SyntacticMatches, 10 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=468, Invalid=1338, Unknown=0, NotChecked=0, Total=1806 [2022-11-25 23:39:35,878 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 1371 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1373 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:39:35,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1373 Valid, 542 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 23:39:35,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9214 states. [2022-11-25 23:39:35,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9214 to 4038. [2022-11-25 23:39:35,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4038 states, 3659 states have (on average 1.4129543591145122) internal successors, (5170), 3744 states have internal predecessors, (5170), 251 states have call successors, (251), 99 states have call predecessors, (251), 99 states have return successors, (251), 194 states have call predecessors, (251), 251 states have call successors, (251) [2022-11-25 23:39:35,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4038 states to 4038 states and 5672 transitions. [2022-11-25 23:39:35,984 INFO L78 Accepts]: Start accepts. Automaton has 4038 states and 5672 transitions. Word has length 41 [2022-11-25 23:39:35,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:39:35,984 INFO L495 AbstractCegarLoop]: Abstraction has 4038 states and 5672 transitions. [2022-11-25 23:39:35,984 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) [2022-11-25 23:39:35,985 INFO L276 IsEmpty]: Start isEmpty. Operand 4038 states and 5672 transitions. [2022-11-25 23:39:35,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-25 23:39:35,985 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:39:35,986 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-25 23:39:35,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 23:39:36,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:39:36,192 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:39:36,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:39:36,192 INFO L85 PathProgramCache]: Analyzing trace with hash 2121445166, now seen corresponding path program 1 times [2022-11-25 23:39:36,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:39:36,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283869110] [2022-11-25 23:39:36,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:39:36,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:39:36,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:39:37,386 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:39:37,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:39:37,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283869110] [2022-11-25 23:39:37,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283869110] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:39:37,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:39:37,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-25 23:39:37,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507905351] [2022-11-25 23:39:37,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:39:37,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 23:39:37,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:39:37,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 23:39:37,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:39:37,389 INFO L87 Difference]: Start difference. First operand 4038 states and 5672 transitions. Second operand has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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) [2022-11-25 23:39:38,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:39:38,275 INFO L93 Difference]: Finished difference Result 3394 states and 4749 transitions. [2022-11-25 23:39:38,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 23:39:38,275 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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 40 [2022-11-25 23:39:38,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:39:38,282 INFO L225 Difference]: With dead ends: 3394 [2022-11-25 23:39:38,283 INFO L226 Difference]: Without dead ends: 3394 [2022-11-25 23:39:38,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2022-11-25 23:39:38,283 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 90 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:39:38,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 458 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:39:38,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3394 states. [2022-11-25 23:39:38,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3394 to 3383. [2022-11-25 23:39:38,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3383 states, 3063 states have (on average 1.4126673196212862) internal successors, (4327), 3140 states have internal predecessors, (4327), 209 states have call successors, (209), 82 states have call predecessors, (209), 82 states have return successors, (209), 160 states have call predecessors, (209), 209 states have call successors, (209) [2022-11-25 23:39:38,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3383 states to 3383 states and 4745 transitions. [2022-11-25 23:39:38,338 INFO L78 Accepts]: Start accepts. Automaton has 3383 states and 4745 transitions. Word has length 40 [2022-11-25 23:39:38,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:39:38,338 INFO L495 AbstractCegarLoop]: Abstraction has 3383 states and 4745 transitions. [2022-11-25 23:39:38,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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) [2022-11-25 23:39:38,338 INFO L276 IsEmpty]: Start isEmpty. Operand 3383 states and 4745 transitions. [2022-11-25 23:39:38,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-25 23:39:38,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:39:38,339 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, 1] [2022-11-25 23:39:38,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-11-25 23:39:38,340 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:39:38,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:39:38,340 INFO L85 PathProgramCache]: Analyzing trace with hash 2086654320, now seen corresponding path program 1 times [2022-11-25 23:39:38,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:39:38,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023015783] [2022-11-25 23:39:38,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:39:38,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:39:38,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:39:40,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:39:40,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:39:40,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023015783] [2022-11-25 23:39:40,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023015783] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:39:40,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136488282] [2022-11-25 23:39:40,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:39:40,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:39:40,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:39:40,242 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:39:40,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 23:39:40,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:39:40,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-25 23:39:40,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:39:40,588 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 [2022-11-25 23:39:40,839 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 [2022-11-25 23:39:41,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:41,061 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 52 treesize of output 35 [2022-11-25 23:39:41,427 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 [2022-11-25 23:39:41,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:39:41,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:39:41,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136488282] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:39:41,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:39:41,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [17] total 32 [2022-11-25 23:39:41,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854618655] [2022-11-25 23:39:41,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:39:41,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 23:39:41,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:39:41,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 23:39:41,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2022-11-25 23:39:41,464 INFO L87 Difference]: Start difference. First operand 3383 states and 4745 transitions. Second operand has 17 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 23:39:43,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:39:43,630 INFO L93 Difference]: Finished difference Result 3864 states and 5422 transitions. [2022-11-25 23:39:43,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 23:39:43,630 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-11-25 23:39:43,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:39:43,637 INFO L225 Difference]: With dead ends: 3864 [2022-11-25 23:39:43,638 INFO L226 Difference]: Without dead ends: 3864 [2022-11-25 23:39:43,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=395, Invalid=2055, Unknown=0, NotChecked=0, Total=2450 [2022-11-25 23:39:43,639 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 606 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 23:39:43,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [609 Valid, 858 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 23:39:43,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3864 states. [2022-11-25 23:39:43,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3864 to 3501. [2022-11-25 23:39:43,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3501 states, 3181 states have (on average 1.4168500471549828) internal successors, (4507), 3258 states have internal predecessors, (4507), 209 states have call successors, (209), 82 states have call predecessors, (209), 82 states have return successors, (209), 160 states have call predecessors, (209), 209 states have call successors, (209) [2022-11-25 23:39:43,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3501 states to 3501 states and 4925 transitions. [2022-11-25 23:39:43,697 INFO L78 Accepts]: Start accepts. Automaton has 3501 states and 4925 transitions. Word has length 41 [2022-11-25 23:39:43,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:39:43,697 INFO L495 AbstractCegarLoop]: Abstraction has 3501 states and 4925 transitions. [2022-11-25 23:39:43,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 23:39:43,697 INFO L276 IsEmpty]: Start isEmpty. Operand 3501 states and 4925 transitions. [2022-11-25 23:39:43,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-25 23:39:43,698 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:39:43,698 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, 1] [2022-11-25 23:39:43,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 23:39:43,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:39:43,905 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr41REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:39:43,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:39:43,905 INFO L85 PathProgramCache]: Analyzing trace with hash 2086654321, now seen corresponding path program 1 times [2022-11-25 23:39:43,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:39:43,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618506368] [2022-11-25 23:39:43,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:39:43,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:39:43,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:39:46,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:39:46,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:39:46,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618506368] [2022-11-25 23:39:46,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618506368] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:39:46,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894237751] [2022-11-25 23:39:46,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:39:46,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:39:46,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:39:46,366 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:39:46,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 23:39:46,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:39:46,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-25 23:39:46,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:39:46,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:39:47,038 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 [2022-11-25 23:39:47,046 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 [2022-11-25 23:39:47,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:47,175 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 29 treesize of output 28 [2022-11-25 23:39:47,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:47,182 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 [2022-11-25 23:39:47,640 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 [2022-11-25 23:39:47,656 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 [2022-11-25 23:39:47,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:39:47,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:39:47,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894237751] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:39:47,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:39:47,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [19] total 33 [2022-11-25 23:39:47,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943209572] [2022-11-25 23:39:47,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:39:47,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 23:39:47,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:39:47,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 23:39:47,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 23:39:47,707 INFO L87 Difference]: Start difference. First operand 3501 states and 4925 transitions. Second operand has 16 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 23:39:50,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:39:50,787 INFO L93 Difference]: Finished difference Result 4284 states and 6000 transitions. [2022-11-25 23:39:50,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-25 23:39:50,788 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-11-25 23:39:50,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:39:50,797 INFO L225 Difference]: With dead ends: 4284 [2022-11-25 23:39:50,797 INFO L226 Difference]: Without dead ends: 4284 [2022-11-25 23:39:50,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=441, Invalid=2981, Unknown=0, NotChecked=0, Total=3422 [2022-11-25 23:39:50,799 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 913 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 1088 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 914 SdHoareTripleChecker+Valid, 937 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:39:50,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [914 Valid, 937 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1088 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-25 23:39:50,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4284 states. [2022-11-25 23:39:50,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4284 to 3699. [2022-11-25 23:39:50,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3699 states, 3363 states have (on average 1.4174843889384479) internal successors, (4767), 3444 states have internal predecessors, (4767), 221 states have call successors, (221), 86 states have call predecessors, (221), 86 states have return successors, (221), 168 states have call predecessors, (221), 221 states have call successors, (221) [2022-11-25 23:39:50,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3699 states to 3699 states and 5209 transitions. [2022-11-25 23:39:50,890 INFO L78 Accepts]: Start accepts. Automaton has 3699 states and 5209 transitions. Word has length 41 [2022-11-25 23:39:50,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:39:50,890 INFO L495 AbstractCegarLoop]: Abstraction has 3699 states and 5209 transitions. [2022-11-25 23:39:50,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 23:39:50,891 INFO L276 IsEmpty]: Start isEmpty. Operand 3699 states and 5209 transitions. [2022-11-25 23:39:50,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-25 23:39:50,897 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:39:50,897 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, 1] [2022-11-25 23:39:50,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 23:39:51,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-25 23:39:51,103 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:39:51,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:39:51,104 INFO L85 PathProgramCache]: Analyzing trace with hash 2086628751, now seen corresponding path program 1 times [2022-11-25 23:39:51,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:39:51,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100995860] [2022-11-25 23:39:51,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:39:51,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:39:51,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:39:51,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:39:51,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:39:51,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100995860] [2022-11-25 23:39:51,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100995860] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:39:51,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:39:51,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-25 23:39:51,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320495821] [2022-11-25 23:39:51,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:39:51,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 23:39:51,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:39:51,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 23:39:51,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:39:51,861 INFO L87 Difference]: Start difference. First operand 3699 states and 5209 transitions. Second operand has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 13 states have internal predecessors, (35), 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) [2022-11-25 23:39:53,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:39:53,389 INFO L93 Difference]: Finished difference Result 5236 states and 7302 transitions. [2022-11-25 23:39:53,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 23:39:53,390 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 13 states have internal predecessors, (35), 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 41 [2022-11-25 23:39:53,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:39:53,401 INFO L225 Difference]: With dead ends: 5236 [2022-11-25 23:39:53,401 INFO L226 Difference]: Without dead ends: 5236 [2022-11-25 23:39:53,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2022-11-25 23:39:53,402 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 831 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 23:39:53,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [831 Valid, 678 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 23:39:53,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5236 states. [2022-11-25 23:39:53,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5236 to 4743. [2022-11-25 23:39:53,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4743 states, 4321 states have (on average 1.4105531127053923) internal successors, (6095), 4413 states have internal predecessors, (6095), 285 states have call successors, (285), 108 states have call predecessors, (285), 108 states have return successors, (285), 221 states have call predecessors, (285), 285 states have call successors, (285) [2022-11-25 23:39:53,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4743 states to 4743 states and 6665 transitions. [2022-11-25 23:39:53,497 INFO L78 Accepts]: Start accepts. Automaton has 4743 states and 6665 transitions. Word has length 41 [2022-11-25 23:39:53,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:39:53,497 INFO L495 AbstractCegarLoop]: Abstraction has 4743 states and 6665 transitions. [2022-11-25 23:39:53,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 13 states have internal predecessors, (35), 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) [2022-11-25 23:39:53,498 INFO L276 IsEmpty]: Start isEmpty. Operand 4743 states and 6665 transitions. [2022-11-25 23:39:53,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-25 23:39:53,498 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:39:53,499 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, 1, 1] [2022-11-25 23:39:53,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-11-25 23:39:53,499 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr42REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:39:53,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:39:53,500 INFO L85 PathProgramCache]: Analyzing trace with hash 261777103, now seen corresponding path program 1 times [2022-11-25 23:39:53,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:39:53,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123137284] [2022-11-25 23:39:53,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:39:53,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:39:53,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:39:56,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:39:56,059 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:39:56,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123137284] [2022-11-25 23:39:56,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123137284] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:39:56,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926939772] [2022-11-25 23:39:56,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:39:56,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:39:56,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:39:56,062 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:39:56,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 23:39:56,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:39:56,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-25 23:39:56,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:39:56,664 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 [2022-11-25 23:39:56,676 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 [2022-11-25 23:39:56,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:56,818 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 23 treesize of output 23 [2022-11-25 23:39:56,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:56,825 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 [2022-11-25 23:39:57,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:57,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 34 treesize of output 10 [2022-11-25 23:39:57,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:57,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 37 treesize of output 13 [2022-11-25 23:39:57,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:39:57,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:39:57,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:39:57,696 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:39:57,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 477 treesize of output 413 [2022-11-25 23:39:57,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:57,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:39:57,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 311 treesize of output 247 [2022-11-25 23:39:58,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:39:58,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926939772] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:39:58,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [882717770] [2022-11-25 23:39:58,180 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2022-11-25 23:39:58,180 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:39:58,180 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:39:58,180 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:39:58,180 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:39:58,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:39:58,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:58,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:58,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:58,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:58,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:58,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 38 [2022-11-25 23:39:58,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:58,427 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 [2022-11-25 23:39:58,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:39:58,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:58,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:58,445 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 43 treesize of output 41 [2022-11-25 23:39:58,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:39:58,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:58,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:58,476 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 43 treesize of output 41 [2022-11-25 23:39:58,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:58,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:58,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:58,527 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 47 treesize of output 52 [2022-11-25 23:39:58,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:58,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:58,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:58,558 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 47 treesize of output 52 [2022-11-25 23:39:58,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:58,580 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 [2022-11-25 23:39:58,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:58,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-25 23:39:58,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:58,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:58,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:58,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:58,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:58,667 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 62 treesize of output 55 [2022-11-25 23:39:58,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:58,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:58,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:58,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:58,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:58,696 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 62 treesize of output 55 [2022-11-25 23:39:58,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:58,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:58,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:58,780 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 [2022-11-25 23:39:58,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:58,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:58,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:58,806 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 58 treesize of output 55 [2022-11-25 23:39:58,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:58,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:58,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:58,834 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 58 treesize of output 55 [2022-11-25 23:39:58,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:58,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:58,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:58,973 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 [2022-11-25 23:39:59,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:59,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:59,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:39:59,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:59,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:59,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:39:59,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 72 [2022-11-25 23:39:59,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:59,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:59,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:39:59,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:59,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:59,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:39:59,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 72 [2022-11-25 23:39:59,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:59,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:59,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:59,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:39:59,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:39:59,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 36 [2022-11-25 23:39:59,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:59,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:59,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:59,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:39:59,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:39:59,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 36 [2022-11-25 23:39:59,461 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:39:59,461 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 [2022-11-25 23:39:59,473 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 17 treesize of output 19 [2022-11-25 23:39:59,547 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 [2022-11-25 23:39:59,572 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 [2022-11-25 23:39:59,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:39:59,629 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-25 23:39:59,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 48 [2022-11-25 23:39:59,667 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-25 23:39:59,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 48 [2022-11-25 23:39:59,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:39:59,774 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-25 23:39:59,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 75 [2022-11-25 23:39:59,851 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-25 23:39:59,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 75 [2022-11-25 23:39:59,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:40:01,363 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 [2022-11-25 23:40:01,381 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 [2022-11-25 23:40:01,868 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 [2022-11-25 23:40:02,719 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 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-25 23:40:02,730 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 [2022-11-25 23:40:02,751 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 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-25 23:40:02,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:40:02,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:02,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-25 23:40:02,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:40:02,990 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:40:02,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 21 [2022-11-25 23:40:03,091 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 [2022-11-25 23:40:03,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:40:03,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:03,108 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 49 treesize of output 43 [2022-11-25 23:40:03,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:03,134 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 [2022-11-25 23:40:03,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:03,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:40:03,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:03,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:03,176 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 60 treesize of output 57 [2022-11-25 23:40:03,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:03,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:40:03,220 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-25 23:40:03,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 44 [2022-11-25 23:40:03,245 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 [2022-11-25 23:40:03,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:40:03,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:03,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:03,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:03,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:03,311 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 75 treesize of output 60 [2022-11-25 23:40:03,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:40:03,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:03,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:03,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:03,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:03,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:03,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:40:03,376 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-25 23:40:03,376 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 2 case distinctions, treesize of input 57 treesize of output 47 [2022-11-25 23:40:03,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:03,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:40:03,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:03,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:03,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 60 [2022-11-25 23:40:03,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:03,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:03,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:40:03,616 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-25 23:40:03,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 54 [2022-11-25 23:40:03,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:03,641 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 33 treesize of output 13 [2022-11-25 23:40:03,781 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 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-25 23:40:03,792 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 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-25 23:40:03,803 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 [2022-11-25 23:40:04,582 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:40:04,582 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-25 23:40:04,614 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:40:04,614 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 [2022-11-25 23:40:04,693 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 [2022-11-25 23:40:04,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:40:04,727 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 [2022-11-25 23:40:04,796 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-25 23:40:04,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 48 [2022-11-25 23:40:04,834 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-25 23:40:04,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 48 [2022-11-25 23:40:04,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:40:04,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:40:04,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:40:04,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:40:05,013 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-25 23:40:05,013 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 33 treesize of output 27 [2022-11-25 23:40:05,031 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 [2022-11-25 23:40:05,051 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 [2022-11-25 23:40:05,185 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 20 for LOIs [2022-11-25 23:40:05,187 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:40:19,495 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '117490#(and (<= (+ |ULTIMATE.start_remove_one_~item~2#1.offset| (* |ULTIMATE.start_remove_one_~next_field~0#1| 4) 4) (select |#length| |ULTIMATE.start_remove_one_~item~2#1.base|)) (<= |~#list~0.base| 3) (= |ULTIMATE.start_is_empty_~no_end~0#1| |ULTIMATE.start_is_empty_~no_beg~0#1|) (<= 0 |#NULL.base|) (= |ULTIMATE.start_is_empty_~no_beg~0#1| (ite (and (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_is_empty_~list#1.base|) (+ |ULTIMATE.start_is_empty_~list#1.offset| (* ~unnamed1~0~LIST_BEG 4))) 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_is_empty_~list#1.base|) (+ |ULTIMATE.start_is_empty_~list#1.offset| (* ~unnamed1~0~LIST_BEG 4))) 0)) 1 0)) (= |ULTIMATE.start_is_empty_~list#1.base| |ULTIMATE.start_is_empty_#in~list#1.base|) (= |ULTIMATE.start_remove_one_~list#1.offset| |ULTIMATE.start_is_empty_#in~list#1.offset|) (<= ~i~0 0) (<= |ULTIMATE.start_main_~z~0#1| 0) (= |ULTIMATE.start_remove_one_~item~2#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_one_~list#1.base|) (+ |ULTIMATE.start_remove_one_~list#1.offset| (* |ULTIMATE.start_remove_one_~from#1| 4)))) (= |ULTIMATE.start_remove_one_#in~list#1.base| |ULTIMATE.start_remove_one_~list#1.base|) (= |ULTIMATE.start_is_empty_~no_end~0#1| (ite (and (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_is_empty_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset|)) 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_is_empty_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset|)) 0)) 1 0)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_one_~item~2#1.base|) (+ |ULTIMATE.start_remove_one_~item~2#1.offset| (* |ULTIMATE.start_remove_one_~next_field~0#1| 4))) |ULTIMATE.start_remove_one_~next~0#1.offset|) (= |ULTIMATE.start_remove_one_~next~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_one_~item~2#1.base|) (+ |ULTIMATE.start_remove_one_~item~2#1.offset| (* |ULTIMATE.start_remove_one_~next_field~0#1| 4)))) (<= 0 ~i~0) (= |ULTIMATE.start_remove_one_#in~from#1| |ULTIMATE.start_main_#t~ret27#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (or (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_one_~list#1.base|) (+ |ULTIMATE.start_remove_one_~list#1.offset| (* ~unnamed1~0~LIST_BEG 4))) (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_one_~list#1.base|) (+ |ULTIMATE.start_remove_one_~list#1.offset| (* ~unnamed1~0~LIST_END 4))))) (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_one_~list#1.base|) (+ |ULTIMATE.start_remove_one_~list#1.offset| (* ~unnamed1~0~LIST_BEG 4))) (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_one_~list#1.base|) (+ |ULTIMATE.start_remove_one_~list#1.offset| (* ~unnamed1~0~LIST_END 4)))))) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_one_~list#1.base|) (+ |ULTIMATE.start_remove_one_~list#1.offset| (* |ULTIMATE.start_remove_one_~from#1| 4))) |ULTIMATE.start_remove_one_~item~2#1.base|) (= |ULTIMATE.start_remove_one_#in~from#1| |ULTIMATE.start_remove_one_~from#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start_remove_one_#in~list#1.base| |~#list~0.base|) (<= 0 |ULTIMATE.start_main_~length~0#1|) (<= (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset| 4) (select |#length| |ULTIMATE.start_is_empty_~list#1.base|)) (= (select |#valid| |ULTIMATE.start_remove_one_~item~2#1.base|) 1) (= |ULTIMATE.start_is_empty_~no_beg~0#1| |ULTIMATE.start_is_empty_#res#1|) (not (= (select |#valid| |ULTIMATE.start_remove_one_~next~0#1.base|) 1)) (<= 0 (+ |ULTIMATE.start_remove_one_~item~2#1.offset| (* |ULTIMATE.start_remove_one_~next_field~0#1| 4))) (= (ite (= ~unnamed1~0~LIST_END |ULTIMATE.start_remove_one_~from#1|) ~unnamed2~0~ITEM_NEXT ~unnamed2~0~ITEM_PREV) |ULTIMATE.start_remove_one_~term_field~1#1|) (<= |#NULL.base| 0) (= |~#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_is_empty_#in~list#1.base| |ULTIMATE.start_remove_one_~list#1.base|) (<= 3 |~#list~0.base|) (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_main_#t~ret27#1|) (= (select |#valid| |ULTIMATE.start_is_empty_~list#1.base|) 1) (<= 0 |#NULL.offset|) (<= 0 (+ |ULTIMATE.start_remove_one_~list#1.offset| (* ~unnamed1~0~LIST_BEG 4))) (= |ULTIMATE.start_remove_one_~list#1.offset| |ULTIMATE.start_remove_one_#in~list#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |~#list~0.offset| 0) (<= 0 |ULTIMATE.start_main_~z~0#1|) (= (ite (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_remove_one_~from#1|) ~unnamed2~0~ITEM_NEXT ~unnamed2~0~ITEM_PREV) |ULTIMATE.start_remove_one_~next_field~0#1|))' at error location [2022-11-25 23:40:19,495 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:40:19,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:40:19,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13, 10] total 39 [2022-11-25 23:40:19,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554927050] [2022-11-25 23:40:19,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:40:19,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-25 23:40:19,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:40:19,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-25 23:40:19,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=5004, Unknown=0, NotChecked=0, Total=5402 [2022-11-25 23:40:19,497 INFO L87 Difference]: Start difference. First operand 4743 states and 6665 transitions. Second operand has 39 states, 37 states have (on average 2.864864864864865) internal successors, (106), 37 states have internal predecessors, (106), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 23:40:28,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:40:28,831 INFO L93 Difference]: Finished difference Result 7227 states and 10046 transitions. [2022-11-25 23:40:28,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-25 23:40:28,832 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 2.864864864864865) internal successors, (106), 37 states have internal predecessors, (106), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 42 [2022-11-25 23:40:28,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:40:28,848 INFO L225 Difference]: With dead ends: 7227 [2022-11-25 23:40:28,848 INFO L226 Difference]: Without dead ends: 7227 [2022-11-25 23:40:28,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=1599, Invalid=13901, Unknown=0, NotChecked=0, Total=15500 [2022-11-25 23:40:28,851 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 2877 mSDsluCounter, 2463 mSDsCounter, 0 mSdLazyCounter, 2712 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2878 SdHoareTripleChecker+Valid, 2603 SdHoareTripleChecker+Invalid, 3007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 2712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-25 23:40:28,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2878 Valid, 2603 Invalid, 3007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 2712 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-25 23:40:28,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7227 states. [2022-11-25 23:40:28,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7227 to 5076. [2022-11-25 23:40:28,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5076 states, 4614 states have (on average 1.410056350238405) internal successors, (6506), 4722 states have internal predecessors, (6506), 317 states have call successors, (317), 116 states have call predecessors, (317), 116 states have return successors, (317), 237 states have call predecessors, (317), 317 states have call successors, (317) [2022-11-25 23:40:28,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5076 states to 5076 states and 7140 transitions. [2022-11-25 23:40:28,996 INFO L78 Accepts]: Start accepts. Automaton has 5076 states and 7140 transitions. Word has length 42 [2022-11-25 23:40:28,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:40:28,997 INFO L495 AbstractCegarLoop]: Abstraction has 5076 states and 7140 transitions. [2022-11-25 23:40:28,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 2.864864864864865) internal successors, (106), 37 states have internal predecessors, (106), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 23:40:28,997 INFO L276 IsEmpty]: Start isEmpty. Operand 5076 states and 7140 transitions. [2022-11-25 23:40:28,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-25 23:40:28,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:40:28,998 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, 1, 1] [2022-11-25 23:40:29,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 23:40:29,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-25 23:40:29,204 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:40:29,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:40:29,205 INFO L85 PathProgramCache]: Analyzing trace with hash 260982050, now seen corresponding path program 1 times [2022-11-25 23:40:29,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:40:29,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332533508] [2022-11-25 23:40:29,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:40:29,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:40:29,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:40:29,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:40:29,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:40:29,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332533508] [2022-11-25 23:40:29,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332533508] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:40:29,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:40:29,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-25 23:40:29,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953067314] [2022-11-25 23:40:29,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:40:29,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 23:40:29,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:40:29,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 23:40:29,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:40:29,763 INFO L87 Difference]: Start difference. First operand 5076 states and 7140 transitions. Second operand has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 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) [2022-11-25 23:40:31,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:40:31,492 INFO L93 Difference]: Finished difference Result 5798 states and 8032 transitions. [2022-11-25 23:40:31,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-25 23:40:31,493 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 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 42 [2022-11-25 23:40:31,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:40:31,505 INFO L225 Difference]: With dead ends: 5798 [2022-11-25 23:40:31,505 INFO L226 Difference]: Without dead ends: 5798 [2022-11-25 23:40:31,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 23:40:31,506 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 627 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:40:31,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [627 Valid, 838 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1004 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 23:40:31,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5798 states. [2022-11-25 23:40:31,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5798 to 5076. [2022-11-25 23:40:31,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5076 states, 4614 states have (on average 1.405504984828782) internal successors, (6485), 4722 states have internal predecessors, (6485), 317 states have call successors, (317), 116 states have call predecessors, (317), 116 states have return successors, (317), 237 states have call predecessors, (317), 317 states have call successors, (317) [2022-11-25 23:40:31,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5076 states to 5076 states and 7119 transitions. [2022-11-25 23:40:31,593 INFO L78 Accepts]: Start accepts. Automaton has 5076 states and 7119 transitions. Word has length 42 [2022-11-25 23:40:31,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:40:31,593 INFO L495 AbstractCegarLoop]: Abstraction has 5076 states and 7119 transitions. [2022-11-25 23:40:31,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 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) [2022-11-25 23:40:31,594 INFO L276 IsEmpty]: Start isEmpty. Operand 5076 states and 7119 transitions. [2022-11-25 23:40:31,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-25 23:40:31,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:40:31,595 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, 1, 1, 1] [2022-11-25 23:40:31,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-11-25 23:40:31,595 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:40:31,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:40:31,596 INFO L85 PathProgramCache]: Analyzing trace with hash -499490831, now seen corresponding path program 1 times [2022-11-25 23:40:31,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:40:31,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485725587] [2022-11-25 23:40:31,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:40:31,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:40:31,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:40:32,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:40:32,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:40:32,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485725587] [2022-11-25 23:40:32,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485725587] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:40:32,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:40:32,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-25 23:40:32,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232125767] [2022-11-25 23:40:32,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:40:32,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 23:40:32,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:40:32,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 23:40:32,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:40:32,276 INFO L87 Difference]: Start difference. First operand 5076 states and 7119 transitions. Second operand has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 13 states have internal predecessors, (38), 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) [2022-11-25 23:40:33,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:40:33,651 INFO L93 Difference]: Finished difference Result 5720 states and 7907 transitions. [2022-11-25 23:40:33,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 23:40:33,652 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 13 states have internal predecessors, (38), 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 43 [2022-11-25 23:40:33,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:40:33,660 INFO L225 Difference]: With dead ends: 5720 [2022-11-25 23:40:33,660 INFO L226 Difference]: Without dead ends: 5720 [2022-11-25 23:40:33,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2022-11-25 23:40:33,661 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 573 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:40:33,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [575 Valid, 894 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 23:40:33,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5720 states. [2022-11-25 23:40:33,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5720 to 5231. [2022-11-25 23:40:33,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5231 states, 4769 states have (on average 1.3965191864122457) internal successors, (6660), 4877 states have internal predecessors, (6660), 317 states have call successors, (317), 116 states have call predecessors, (317), 116 states have return successors, (317), 237 states have call predecessors, (317), 317 states have call successors, (317) [2022-11-25 23:40:33,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5231 states to 5231 states and 7294 transitions. [2022-11-25 23:40:33,749 INFO L78 Accepts]: Start accepts. Automaton has 5231 states and 7294 transitions. Word has length 43 [2022-11-25 23:40:33,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:40:33,750 INFO L495 AbstractCegarLoop]: Abstraction has 5231 states and 7294 transitions. [2022-11-25 23:40:33,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 13 states have internal predecessors, (38), 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) [2022-11-25 23:40:33,750 INFO L276 IsEmpty]: Start isEmpty. Operand 5231 states and 7294 transitions. [2022-11-25 23:40:33,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-25 23:40:33,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:40:33,751 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1] [2022-11-25 23:40:33,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-11-25 23:40:33,752 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:40:33,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:40:33,752 INFO L85 PathProgramCache]: Analyzing trace with hash -27099674, now seen corresponding path program 1 times [2022-11-25 23:40:33,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:40:33,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442563837] [2022-11-25 23:40:33,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:40:33,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:40:33,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:40:33,854 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:40:33,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:40:33,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442563837] [2022-11-25 23:40:33,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442563837] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:40:33,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:40:33,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:40:33,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103506753] [2022-11-25 23:40:33,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:40:33,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:40:33,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:40:33,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:40:33,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:40:33,857 INFO L87 Difference]: Start difference. First operand 5231 states and 7294 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2022-11-25 23:40:33,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:40:33,981 INFO L93 Difference]: Finished difference Result 4875 states and 6893 transitions. [2022-11-25 23:40:33,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:40:33,982 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 43 [2022-11-25 23:40:33,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:40:33,989 INFO L225 Difference]: With dead ends: 4875 [2022-11-25 23:40:33,989 INFO L226 Difference]: Without dead ends: 4875 [2022-11-25 23:40:33,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:40:33,990 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 96 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:40:33,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 332 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:40:33,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4875 states. [2022-11-25 23:40:34,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4875 to 3575. [2022-11-25 23:40:34,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3575 states, 3248 states have (on average 1.3934729064039408) internal successors, (4526), 3334 states have internal predecessors, (4526), 219 states have call successors, (219), 79 states have call predecessors, (219), 79 states have return successors, (219), 161 states have call predecessors, (219), 219 states have call successors, (219) [2022-11-25 23:40:34,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3575 states to 3575 states and 4964 transitions. [2022-11-25 23:40:34,061 INFO L78 Accepts]: Start accepts. Automaton has 3575 states and 4964 transitions. Word has length 43 [2022-11-25 23:40:34,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:40:34,062 INFO L495 AbstractCegarLoop]: Abstraction has 3575 states and 4964 transitions. [2022-11-25 23:40:34,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2022-11-25 23:40:34,062 INFO L276 IsEmpty]: Start isEmpty. Operand 3575 states and 4964 transitions. [2022-11-25 23:40:34,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-25 23:40:34,063 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:40:34,063 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, 1, 1, 1, 1] [2022-11-25 23:40:34,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-11-25 23:40:34,064 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:40:34,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:40:34,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1695653636, now seen corresponding path program 1 times [2022-11-25 23:40:34,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:40:34,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625615130] [2022-11-25 23:40:34,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:40:34,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:40:34,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:40:34,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:40:34,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:40:34,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625615130] [2022-11-25 23:40:34,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625615130] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:40:34,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:40:34,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-25 23:40:34,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185164498] [2022-11-25 23:40:34,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:40:34,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 23:40:34,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:40:34,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 23:40:34,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-11-25 23:40:34,898 INFO L87 Difference]: Start difference. First operand 3575 states and 4964 transitions. Second operand has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 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) [2022-11-25 23:40:38,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:40:38,324 INFO L93 Difference]: Finished difference Result 4995 states and 6733 transitions. [2022-11-25 23:40:38,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-25 23:40:38,327 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 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 44 [2022-11-25 23:40:38,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:40:38,334 INFO L225 Difference]: With dead ends: 4995 [2022-11-25 23:40:38,334 INFO L226 Difference]: Without dead ends: 4995 [2022-11-25 23:40:38,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=672, Invalid=2084, Unknown=0, NotChecked=0, Total=2756 [2022-11-25 23:40:38,336 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 1178 mSDsluCounter, 1142 mSDsCounter, 0 mSdLazyCounter, 2121 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1178 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 2242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 2121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-25 23:40:38,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1178 Valid, 1358 Invalid, 2242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 2121 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-25 23:40:38,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4995 states. [2022-11-25 23:40:38,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4995 to 4047. [2022-11-25 23:40:38,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4047 states, 3692 states have (on average 1.3607800650054171) internal successors, (5024), 3774 states have internal predecessors, (5024), 243 states have call successors, (243), 87 states have call predecessors, (243), 87 states have return successors, (243), 185 states have call predecessors, (243), 243 states have call successors, (243) [2022-11-25 23:40:38,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4047 states to 4047 states and 5510 transitions. [2022-11-25 23:40:38,409 INFO L78 Accepts]: Start accepts. Automaton has 4047 states and 5510 transitions. Word has length 44 [2022-11-25 23:40:38,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:40:38,410 INFO L495 AbstractCegarLoop]: Abstraction has 4047 states and 5510 transitions. [2022-11-25 23:40:38,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 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) [2022-11-25 23:40:38,410 INFO L276 IsEmpty]: Start isEmpty. Operand 4047 states and 5510 transitions. [2022-11-25 23:40:38,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-25 23:40:38,411 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:40:38,411 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1] [2022-11-25 23:40:38,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-11-25 23:40:38,412 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:40:38,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:40:38,412 INFO L85 PathProgramCache]: Analyzing trace with hash 201576609, now seen corresponding path program 1 times [2022-11-25 23:40:38,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:40:38,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984780464] [2022-11-25 23:40:38,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:40:38,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:40:38,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:40:38,543 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:40:38,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:40:38,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984780464] [2022-11-25 23:40:38,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984780464] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:40:38,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780486127] [2022-11-25 23:40:38,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:40:38,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:40:38,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:40:38,545 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:40:38,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 23:40:38,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:40:38,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 23:40:38,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:40:39,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:40:39,144 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 17 treesize of output 7 [2022-11-25 23:40:39,251 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 23:40:39,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:40:39,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 23:40:39,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780486127] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:40:39,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [938415343] [2022-11-25 23:40:39,409 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-25 23:40:39,409 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:40:39,409 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:40:39,410 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:40:39,410 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:40:40,145 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-11-25 23:40:40,146 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 [2022-11-25 23:40:40,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:40:40,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:40,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:40,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:40,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:40:40,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:40:40,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 71 [2022-11-25 23:40:40,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:40,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:40:40,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:40,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:40,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:40:40,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:40:40,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 83 [2022-11-25 23:40:40,259 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 [2022-11-25 23:40:40,314 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 14 treesize of output 10 [2022-11-25 23:40:40,328 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 16 treesize of output 12 [2022-11-25 23:40:40,345 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 14 treesize of output 10 [2022-11-25 23:40:41,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:40:41,709 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-11-25 23:40:41,709 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 507 treesize of output 507 [2022-11-25 23:40:41,928 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 14 treesize of output 10 [2022-11-25 23:40:41,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:40:41,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:41,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:40:41,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:41,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:41,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:40:41,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:40:41,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 475 treesize of output 394 [2022-11-25 23:40:41,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:40:41,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:40:41,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:41,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:41,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:41,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:40:41,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:40:41,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 415 treesize of output 350 [2022-11-25 23:40:42,103 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 16 treesize of output 12 [2022-11-25 23:40:42,115 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 14 treesize of output 10 [2022-11-25 23:40:42,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:40:43,315 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-11-25 23:40:43,315 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 45 treesize of output 49 [2022-11-25 23:40:43,381 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 [2022-11-25 23:40:43,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:40:43,395 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 0 case distinctions, treesize of input 25 treesize of output 17 [2022-11-25 23:40:43,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:40:43,408 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 0 case distinctions, treesize of input 53 treesize of output 29 [2022-11-25 23:40:43,482 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 14 treesize of output 10 [2022-11-25 23:40:43,498 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 14 treesize of output 10 [2022-11-25 23:40:43,527 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 16 treesize of output 12 [2022-11-25 23:40:43,572 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 14 treesize of output 10 [2022-11-25 23:40:43,588 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 14 treesize of output 10 [2022-11-25 23:40:43,603 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 16 treesize of output 12 [2022-11-25 23:40:44,958 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-11-25 23:40:44,958 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 45 treesize of output 49 [2022-11-25 23:40:45,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:40:45,020 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 0 case distinctions, treesize of input 28 treesize of output 16 [2022-11-25 23:40:45,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:40:45,033 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 0 case distinctions, treesize of input 56 treesize of output 28 [2022-11-25 23:40:45,052 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 14 treesize of output 10 [2022-11-25 23:40:45,129 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 14 treesize of output 10 [2022-11-25 23:40:45,143 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 14 treesize of output 10 [2022-11-25 23:40:45,156 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 16 treesize of output 12 [2022-11-25 23:40:45,223 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 14 treesize of output 10 [2022-11-25 23:40:45,235 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 16 treesize of output 12 [2022-11-25 23:40:45,254 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 14 treesize of output 10 [2022-11-25 23:40:46,213 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 15 for LOIs [2022-11-25 23:40:46,215 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:40:53,500 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '169721#(and (= |~#list~0.offset| 0) (= (select |#valid| |~#list~0.base|) 1) (= (select (select |#memory_$Pointer$.offset| |~#list~0.base|) (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset|)) |ULTIMATE.start_main_~cursor~0#1.offset|) (= 3 |~#list~0.base|) (<= 0 ~i~0) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset| 4) (select |#length| |~#list~0.base|)) (= |ULTIMATE.start_main_~y~0#1| 0) (or (and (= ~unnamed2~0~ITEM_NEXT |ULTIMATE.start_main_~direction~0#1|) (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_main_~end_point~0#1|)) (and (= ~unnamed2~0~ITEM_PREV |ULTIMATE.start_main_~direction~0#1|) (= ~unnamed1~0~LIST_END |ULTIMATE.start_main_~end_point~0#1|))) (= |ULTIMATE.start_main_~z~0#1| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.base| |~#list~0.base|) (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset|)) |ULTIMATE.start_main_~cursor~0#1.base|) (= |ULTIMATE.start_main_~length~0#1| 0) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-11-25 23:40:53,500 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:40:53,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:40:53,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2022-11-25 23:40:53,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056183001] [2022-11-25 23:40:53,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:40:53,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 23:40:53,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:40:53,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 23:40:53,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1357, Unknown=0, NotChecked=0, Total=1560 [2022-11-25 23:40:53,502 INFO L87 Difference]: Start difference. First operand 4047 states and 5510 transitions. Second operand has 14 states, 14 states have (on average 7.857142857142857) internal successors, (110), 14 states have internal predecessors, (110), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 23:40:54,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:40:54,634 INFO L93 Difference]: Finished difference Result 5183 states and 7105 transitions. [2022-11-25 23:40:54,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 23:40:54,635 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.857142857142857) internal successors, (110), 14 states have internal predecessors, (110), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 44 [2022-11-25 23:40:54,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:40:54,642 INFO L225 Difference]: With dead ends: 5183 [2022-11-25 23:40:54,642 INFO L226 Difference]: Without dead ends: 5179 [2022-11-25 23:40:54,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 95 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=312, Invalid=2138, Unknown=0, NotChecked=0, Total=2450 [2022-11-25 23:40:54,643 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 411 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:40:54,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 728 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 23:40:54,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5179 states. [2022-11-25 23:40:54,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5179 to 4062. [2022-11-25 23:40:54,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4062 states, 3707 states have (on average 1.3587806851901807) internal successors, (5037), 3789 states have internal predecessors, (5037), 243 states have call successors, (243), 87 states have call predecessors, (243), 87 states have return successors, (243), 185 states have call predecessors, (243), 243 states have call successors, (243) [2022-11-25 23:40:54,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4062 states to 4062 states and 5523 transitions. [2022-11-25 23:40:54,714 INFO L78 Accepts]: Start accepts. Automaton has 4062 states and 5523 transitions. Word has length 44 [2022-11-25 23:40:54,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:40:54,715 INFO L495 AbstractCegarLoop]: Abstraction has 4062 states and 5523 transitions. [2022-11-25 23:40:54,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.857142857142857) internal successors, (110), 14 states have internal predecessors, (110), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 23:40:54,715 INFO L276 IsEmpty]: Start isEmpty. Operand 4062 states and 5523 transitions. [2022-11-25 23:40:54,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-25 23:40:54,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:40:54,716 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, 1, 1, 1, 1, 1] [2022-11-25 23:40:54,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-11-25 23:40:54,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:40:54,922 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:40:54,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:40:54,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1025655379, now seen corresponding path program 1 times [2022-11-25 23:40:54,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:40:54,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103423457] [2022-11-25 23:40:54,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:40:54,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:40:54,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:40:55,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:40:55,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:40:55,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103423457] [2022-11-25 23:40:55,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103423457] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:40:55,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:40:55,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 23:40:55,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31974208] [2022-11-25 23:40:55,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:40:55,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:40:55,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:40:55,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:40:55,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:40:55,155 INFO L87 Difference]: Start difference. First operand 4062 states and 5523 transitions. Second operand has 7 states, 6 states have (on average 6.5) internal successors, (39), 7 states have internal predecessors, (39), 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) [2022-11-25 23:40:55,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:40:55,604 INFO L93 Difference]: Finished difference Result 5345 states and 7291 transitions. [2022-11-25 23:40:55,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:40:55,605 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.5) internal successors, (39), 7 states have internal predecessors, (39), 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 45 [2022-11-25 23:40:55,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:40:55,613 INFO L225 Difference]: With dead ends: 5345 [2022-11-25 23:40:55,613 INFO L226 Difference]: Without dead ends: 5345 [2022-11-25 23:40:55,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-11-25 23:40:55,614 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 623 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:40:55,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [623 Valid, 286 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:40:55,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5345 states. [2022-11-25 23:40:55,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5345 to 4061. [2022-11-25 23:40:55,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4061 states, 3707 states have (on average 1.3571621257081197) internal successors, (5031), 3788 states have internal predecessors, (5031), 243 states have call successors, (243), 87 states have call predecessors, (243), 87 states have return successors, (243), 185 states have call predecessors, (243), 243 states have call successors, (243) [2022-11-25 23:40:55,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4061 states to 4061 states and 5517 transitions. [2022-11-25 23:40:55,682 INFO L78 Accepts]: Start accepts. Automaton has 4061 states and 5517 transitions. Word has length 45 [2022-11-25 23:40:55,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:40:55,683 INFO L495 AbstractCegarLoop]: Abstraction has 4061 states and 5517 transitions. [2022-11-25 23:40:55,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.5) internal successors, (39), 7 states have internal predecessors, (39), 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) [2022-11-25 23:40:55,683 INFO L276 IsEmpty]: Start isEmpty. Operand 4061 states and 5517 transitions. [2022-11-25 23:40:55,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-25 23:40:55,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:40:55,684 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:40:55,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-11-25 23:40:55,685 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:40:55,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:40:55,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1064260176, now seen corresponding path program 1 times [2022-11-25 23:40:55,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:40:55,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861511923] [2022-11-25 23:40:55,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:40:55,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:40:55,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:40:56,485 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:40:56,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:40:56,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861511923] [2022-11-25 23:40:56,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861511923] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:40:56,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:40:56,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-25 23:40:56,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495555132] [2022-11-25 23:40:56,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:40:56,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 23:40:56,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:40:56,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 23:40:56,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:40:56,487 INFO L87 Difference]: Start difference. First operand 4061 states and 5517 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 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) [2022-11-25 23:40:58,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:40:58,366 INFO L93 Difference]: Finished difference Result 4679 states and 6234 transitions. [2022-11-25 23:40:58,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-25 23:40:58,366 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 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 46 [2022-11-25 23:40:58,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:40:58,371 INFO L225 Difference]: With dead ends: 4679 [2022-11-25 23:40:58,371 INFO L226 Difference]: Without dead ends: 4679 [2022-11-25 23:40:58,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=397, Invalid=935, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 23:40:58,372 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 823 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:40:58,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [823 Valid, 860 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 23:40:58,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4679 states. [2022-11-25 23:40:58,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4679 to 3366. [2022-11-25 23:40:58,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3366 states, 3045 states have (on average 1.3566502463054186) internal successors, (4131), 3120 states have internal predecessors, (4131), 211 states have call successors, (211), 86 states have call predecessors, (211), 86 states have return successors, (211), 159 states have call predecessors, (211), 211 states have call successors, (211) [2022-11-25 23:40:58,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3366 states to 3366 states and 4553 transitions. [2022-11-25 23:40:58,438 INFO L78 Accepts]: Start accepts. Automaton has 3366 states and 4553 transitions. Word has length 46 [2022-11-25 23:40:58,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:40:58,438 INFO L495 AbstractCegarLoop]: Abstraction has 3366 states and 4553 transitions. [2022-11-25 23:40:58,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 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) [2022-11-25 23:40:58,439 INFO L276 IsEmpty]: Start isEmpty. Operand 3366 states and 4553 transitions. [2022-11-25 23:40:58,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-25 23:40:58,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:40:58,440 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 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] [2022-11-25 23:40:58,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-11-25 23:40:58,440 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:40:58,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:40:58,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1210309745, now seen corresponding path program 1 times [2022-11-25 23:40:58,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:40:58,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715790071] [2022-11-25 23:40:58,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:40:58,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:40:58,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:40:58,609 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 23:40:58,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:40:58,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715790071] [2022-11-25 23:40:58,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715790071] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:40:58,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512585326] [2022-11-25 23:40:58,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:40:58,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:40:58,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:40:58,615 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:40:58,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 23:40:58,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:40:58,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-25 23:40:58,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:40:59,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:40:59,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:59,245 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 76 [2022-11-25 23:40:59,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:40:59,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:59,251 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 44 [2022-11-25 23:40:59,325 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 23:40:59,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:40:59,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512585326] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:40:59,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:40:59,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 13 [2022-11-25 23:40:59,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442007937] [2022-11-25 23:40:59,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:40:59,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 23:40:59,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:40:59,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 23:40:59,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:40:59,327 INFO L87 Difference]: Start difference. First operand 3366 states and 4553 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 23:41:00,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:41:00,120 INFO L93 Difference]: Finished difference Result 3010 states and 4053 transitions. [2022-11-25 23:41:00,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 23:41:00,121 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 47 [2022-11-25 23:41:00,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:41:00,124 INFO L225 Difference]: With dead ends: 3010 [2022-11-25 23:41:00,125 INFO L226 Difference]: Without dead ends: 3010 [2022-11-25 23:41:00,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-11-25 23:41:00,125 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 95 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:41:00,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 503 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:41:00,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3010 states. [2022-11-25 23:41:00,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3010 to 2949. [2022-11-25 23:41:00,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2949 states, 2669 states have (on average 1.3525665043087298) internal successors, (3610), 2734 states have internal predecessors, (3610), 185 states have call successors, (185), 71 states have call predecessors, (185), 71 states have return successors, (185), 143 states have call predecessors, (185), 185 states have call successors, (185) [2022-11-25 23:41:00,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2949 states to 2949 states and 3980 transitions. [2022-11-25 23:41:00,167 INFO L78 Accepts]: Start accepts. Automaton has 2949 states and 3980 transitions. Word has length 47 [2022-11-25 23:41:00,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:41:00,167 INFO L495 AbstractCegarLoop]: Abstraction has 2949 states and 3980 transitions. [2022-11-25 23:41:00,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 23:41:00,167 INFO L276 IsEmpty]: Start isEmpty. Operand 2949 states and 3980 transitions. [2022-11-25 23:41:00,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-25 23:41:00,168 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:41:00,168 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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, 1, 1, 1] [2022-11-25 23:41:00,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-25 23:41:00,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:41:00,375 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:41:00,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:41:00,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1123903815, now seen corresponding path program 1 times [2022-11-25 23:41:00,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:41:00,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239734218] [2022-11-25 23:41:00,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:00,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:41:00,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:02,787 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:41:02,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:41:02,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239734218] [2022-11-25 23:41:02,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239734218] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:41:02,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825567074] [2022-11-25 23:41:02,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:02,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:41:02,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:41:02,789 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:41:02,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 23:41:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:03,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-25 23:41:03,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:41:03,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:03,651 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 35 treesize of output 34 [2022-11-25 23:41:03,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:03,656 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 35 treesize of output 34 [2022-11-25 23:41:04,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:04,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:04,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:04,044 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:41:04,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 144 treesize of output 130 [2022-11-25 23:41:04,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:04,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:04,066 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:41:04,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 66 [2022-11-25 23:41:04,288 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:04,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:41:05,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:41:05,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:41:05,814 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:41:05,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 277 treesize of output 267 [2022-11-25 23:41:05,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:41:05,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:41:05,847 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:41:05,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 231 treesize of output 215 [2022-11-25 23:41:07,019 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:41:07,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825567074] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:41:07,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1418921932] [2022-11-25 23:41:07,021 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-25 23:41:07,021 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:41:07,021 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:41:07,021 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:41:07,021 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:41:07,649 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:41:07,649 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 [2022-11-25 23:41:07,662 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 17 treesize of output 19 [2022-11-25 23:41:07,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:41:07,753 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 [2022-11-25 23:41:07,766 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 [2022-11-25 23:41:07,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:07,797 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 40 [2022-11-25 23:41:07,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:41:07,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:07,836 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 40 [2022-11-25 23:41:07,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:07,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:07,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:07,902 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 53 treesize of output 43 [2022-11-25 23:41:07,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:41:07,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:07,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:07,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:07,942 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 53 treesize of output 43 [2022-11-25 23:41:08,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:08,011 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 49 treesize of output 43 [2022-11-25 23:41:08,035 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 33 treesize of output 13 [2022-11-25 23:41:08,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:08,053 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 49 treesize of output 43 [2022-11-25 23:41:08,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:08,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:41:08,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:08,165 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 85 treesize of output 74 [2022-11-25 23:41:08,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:08,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:41:08,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:08,185 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 77 treesize of output 66 [2022-11-25 23:41:08,215 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 33 treesize of output 13 [2022-11-25 23:41:09,015 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:41:09,016 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-25 23:41:09,050 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:41:09,051 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 [2022-11-25 23:41:09,122 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 [2022-11-25 23:41:09,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:41:09,156 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 [2022-11-25 23:41:09,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:09,185 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 40 [2022-11-25 23:41:09,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:41:09,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:09,214 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 40 [2022-11-25 23:41:09,262 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 19 treesize of output 1 [2022-11-25 23:41:09,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:41:09,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:41:09,313 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 [2022-11-25 23:41:09,352 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-25 23:41:09,352 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 33 treesize of output 27 [2022-11-25 23:41:09,370 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 [2022-11-25 23:41:09,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:09,431 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 47 treesize of output 27 [2022-11-25 23:41:09,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:09,477 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-25 23:41:09,477 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 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-25 23:41:09,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:09,522 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-25 23:41:09,522 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 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-25 23:41:10,198 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:41:10,198 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-25 23:41:10,243 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:41:10,243 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 [2022-11-25 23:41:10,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:41:10,337 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 [2022-11-25 23:41:10,359 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 [2022-11-25 23:41:10,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:41:10,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:10,407 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 40 [2022-11-25 23:41:10,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:10,427 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 40 [2022-11-25 23:41:10,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:41:10,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:41:10,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:41:10,508 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 [2022-11-25 23:41:10,522 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 15 treesize of output 11 [2022-11-25 23:41:10,562 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-25 23:41:10,562 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 33 treesize of output 27 [2022-11-25 23:41:10,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:10,674 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-25 23:41:10,674 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 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-25 23:41:10,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:10,719 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-25 23:41:10,720 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 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-25 23:41:10,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:10,745 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 47 treesize of output 27 [2022-11-25 23:41:11,621 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:41:11,621 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 [2022-11-25 23:41:11,636 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 17 treesize of output 19 [2022-11-25 23:41:11,750 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 [2022-11-25 23:41:11,769 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 [2022-11-25 23:41:11,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:41:11,973 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 27 for LOIs [2022-11-25 23:41:11,977 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:41:23,295 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '203006#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_is_empty_~no_beg~0#1| (ite (and (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_is_empty_~list#1.base|) (+ |ULTIMATE.start_is_empty_~list#1.offset| (* ~unnamed1~0~LIST_BEG 4))) 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_is_empty_~list#1.base|) (+ |ULTIMATE.start_is_empty_~list#1.offset| (* ~unnamed1~0~LIST_BEG 4))) 0)) 1 0)) (= |ULTIMATE.start_is_empty_~list#1.base| |ULTIMATE.start_is_empty_#in~list#1.base|) (<= |ULTIMATE.start_main_~z~0#1| 0) (= |ULTIMATE.start_remove_one_#in~list#1.base| |ULTIMATE.start_remove_one_~list#1.base|) (= |ULTIMATE.start_is_empty_~no_end~0#1| (ite (and (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_is_empty_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset|)) 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_is_empty_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset|)) 0)) 1 0)) (= 3 |~#list~0.base|) (<= 0 ~i~0) (= |ULTIMATE.start_remove_one_#in~from#1| |ULTIMATE.start_main_#t~ret27#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_remove_one_#in~from#1| |ULTIMATE.start_remove_one_~from#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start_remove_one_#in~list#1.base| |~#list~0.base|) (or (< 10 ~i~0) (not (= |ULTIMATE.start_is_empty_~no_end~0#1| |ULTIMATE.start_is_empty_~no_beg~0#1|))) (<= 0 |ULTIMATE.start_main_~length~0#1|) (<= (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset| 4) (select |#length| |ULTIMATE.start_is_empty_~list#1.base|)) (<= |#NULL.base| 0) (= |~#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_is_empty_~list#1.offset| 0) (<= 0 |~#list~0.offset|) (= |ULTIMATE.start_is_empty_#in~list#1.base| |ULTIMATE.start_remove_one_~list#1.base|) (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_main_#t~ret27#1|) (= (select |#valid| |ULTIMATE.start_is_empty_~list#1.base|) 1) (<= 0 |#NULL.offset|) (= |ULTIMATE.start_remove_one_~list#1.offset| |ULTIMATE.start_remove_one_#in~list#1.offset|) (<= 0 |#StackHeapBarrier|) (not (< |ULTIMATE.start_is_empty_~list#1.base| |#StackHeapBarrier|)) (<= |~#list~0.offset| 0) (<= 0 |ULTIMATE.start_main_~z~0#1|))' at error location [2022-11-25 23:41:23,295 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:41:23,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:41:23,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 16] total 47 [2022-11-25 23:41:23,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372720148] [2022-11-25 23:41:23,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:41:23,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-25 23:41:23,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:41:23,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-25 23:41:23,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=4883, Unknown=0, NotChecked=0, Total=5256 [2022-11-25 23:41:23,298 INFO L87 Difference]: Start difference. First operand 2949 states and 3980 transitions. Second operand has 47 states, 46 states have (on average 2.891304347826087) internal successors, (133), 46 states have internal predecessors, (133), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 23:42:41,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:42:41,547 INFO L93 Difference]: Finished difference Result 15782 states and 20954 transitions. [2022-11-25 23:42:41,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 309 states. [2022-11-25 23:42:41,548 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.891304347826087) internal successors, (133), 46 states have internal predecessors, (133), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 50 [2022-11-25 23:42:41,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:42:41,570 INFO L225 Difference]: With dead ends: 15782 [2022-11-25 23:42:41,570 INFO L226 Difference]: Without dead ends: 15740 [2022-11-25 23:42:41,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 86 SyntacticMatches, 17 SemanticMatches, 370 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55544 ImplicationChecksByTransitivity, 78.5s TimeCoverageRelationStatistics Valid=19074, Invalid=118938, Unknown=0, NotChecked=0, Total=138012 [2022-11-25 23:42:41,588 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 12341 mSDsluCounter, 5740 mSDsCounter, 0 mSdLazyCounter, 8909 mSolverCounterSat, 1980 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12345 SdHoareTripleChecker+Valid, 5974 SdHoareTripleChecker+Invalid, 10889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1980 IncrementalHoareTripleChecker+Valid, 8909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:42:41,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12345 Valid, 5974 Invalid, 10889 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1980 Valid, 8909 Invalid, 0 Unknown, 0 Unchecked, 12.4s Time] [2022-11-25 23:42:41,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15740 states. [2022-11-25 23:42:41,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15740 to 7634. [2022-11-25 23:42:41,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7634 states, 6946 states have (on average 1.3528649582493522) internal successors, (9397), 7085 states have internal predecessors, (9397), 485 states have call successors, (485), 179 states have call predecessors, (485), 179 states have return successors, (485), 369 states have call predecessors, (485), 485 states have call successors, (485) [2022-11-25 23:42:41,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7634 states to 7634 states and 10367 transitions. [2022-11-25 23:42:41,788 INFO L78 Accepts]: Start accepts. Automaton has 7634 states and 10367 transitions. Word has length 50 [2022-11-25 23:42:41,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:42:41,789 INFO L495 AbstractCegarLoop]: Abstraction has 7634 states and 10367 transitions. [2022-11-25 23:42:41,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.891304347826087) internal successors, (133), 46 states have internal predecessors, (133), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 23:42:41,789 INFO L276 IsEmpty]: Start isEmpty. Operand 7634 states and 10367 transitions. [2022-11-25 23:42:41,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-25 23:42:41,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:42:41,790 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:42:41,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-25 23:42:42,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:42:42,001 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:42:42,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:42:42,002 INFO L85 PathProgramCache]: Analyzing trace with hash -622443914, now seen corresponding path program 1 times [2022-11-25 23:42:42,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:42:42,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027531169] [2022-11-25 23:42:42,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:42:42,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:42:42,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:42:43,724 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:42:43,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:42:43,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027531169] [2022-11-25 23:42:43,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027531169] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:42:43,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755412479] [2022-11-25 23:42:43,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:42:43,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:42:43,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:42:43,726 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:42:43,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-25 23:42:43,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:42:43,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-25 23:42:43,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:42:44,350 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 [2022-11-25 23:42:44,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:42:44,447 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 28 treesize of output 27 [2022-11-25 23:42:44,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2022-11-25 23:42:44,692 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:42:44,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:42:44,937 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 126 treesize of output 118 [2022-11-25 23:42:45,306 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:42:45,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755412479] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:42:45,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [867304591] [2022-11-25 23:42:45,308 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2022-11-25 23:42:45,308 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:42:45,308 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:42:45,308 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:42:45,308 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:42:45,944 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:42:45,944 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 [2022-11-25 23:42:45,955 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 17 treesize of output 19 [2022-11-25 23:42:46,036 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 [2022-11-25 23:42:46,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:42:46,064 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 [2022-11-25 23:42:46,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:42:46,092 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 40 [2022-11-25 23:42:46,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:42:46,110 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 40 [2022-11-25 23:42:46,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:42:46,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:42:46,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:42:46,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:42:46,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:42:46,192 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 53 treesize of output 43 [2022-11-25 23:42:46,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:42:46,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:42:46,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:42:46,213 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 53 treesize of output 43 [2022-11-25 23:42:46,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:42:46,273 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 49 treesize of output 43 [2022-11-25 23:42:46,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:42:46,302 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 49 treesize of output 43 [2022-11-25 23:42:46,322 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 33 treesize of output 13 [2022-11-25 23:42:46,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:42:46,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:42:46,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:42:46,427 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 85 treesize of output 74 [2022-11-25 23:42:46,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:42:46,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:42:46,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:42:46,451 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 77 treesize of output 66 [2022-11-25 23:42:46,485 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 33 treesize of output 13 [2022-11-25 23:42:47,525 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:42:47,526 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 [2022-11-25 23:42:47,616 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 17 treesize of output 19 [2022-11-25 23:42:47,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:42:47,735 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 [2022-11-25 23:42:47,751 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 [2022-11-25 23:42:47,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:42:47,798 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 40 [2022-11-25 23:42:47,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:42:47,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:42:47,838 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 40 [2022-11-25 23:42:47,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:42:47,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:42:47,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:42:47,939 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 [2022-11-25 23:42:47,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 23:42:47,994 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-25 23:42:47,994 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 33 treesize of output 27 [2022-11-25 23:42:48,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:42:48,071 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 47 treesize of output 27 [2022-11-25 23:42:48,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:42:48,115 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-25 23:42:48,115 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 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-25 23:42:48,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:42:48,160 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-25 23:42:48,160 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 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-25 23:42:48,928 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:42:48,929 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-25 23:42:48,960 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:42:48,961 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 [2022-11-25 23:42:49,035 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 [2022-11-25 23:42:49,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:42:49,069 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 [2022-11-25 23:42:49,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:42:49,101 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 40 [2022-11-25 23:42:49,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:42:49,127 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 40 [2022-11-25 23:42:49,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:42:49,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:42:49,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:42:49,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:42:49,251 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-25 23:42:49,251 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 33 treesize of output 27 [2022-11-25 23:42:49,270 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 [2022-11-25 23:42:49,282 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 [2022-11-25 23:42:49,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:42:49,397 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-25 23:42:49,397 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 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-25 23:42:49,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:42:49,434 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-25 23:42:49,435 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 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-25 23:42:49,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:42:49,461 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 47 treesize of output 27 [2022-11-25 23:42:50,264 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:42:50,265 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-25 23:42:50,305 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:42:50,305 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 [2022-11-25 23:42:50,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:42:50,428 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 [2022-11-25 23:42:50,442 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 [2022-11-25 23:42:50,470 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 18 for LOIs [2022-11-25 23:42:50,473 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:42:59,334 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '227402#(and (= |~#list~0.offset| 0) (= (select |#valid| |~#list~0.base|) 1) (= (select (select |#memory_$Pointer$.offset| |~#list~0.base|) (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset|)) |ULTIMATE.start_main_~cursor~0#1.offset|) (= 3 |~#list~0.base|) (<= 0 ~i~0) (<= (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset| 4) (select |#length| |~#list~0.base|)) (< 0 |ULTIMATE.start_main_~length~0#1|) (not (= (select |#valid| |ULTIMATE.start_main_~cursor~0#1.base|) 1)) (= |ULTIMATE.start_main_~y~0#1| 0) (or (and (= ~unnamed2~0~ITEM_NEXT |ULTIMATE.start_main_~direction~0#1|) (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_main_~end_point~0#1|)) (and (= ~unnamed2~0~ITEM_PREV |ULTIMATE.start_main_~direction~0#1|) (= ~unnamed1~0~LIST_END |ULTIMATE.start_main_~end_point~0#1|))) (= |ULTIMATE.start_main_~z~0#1| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.base| |~#list~0.base|) (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset|)) |ULTIMATE.start_main_~cursor~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-25 23:42:59,334 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:42:59,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:42:59,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 40 [2022-11-25 23:42:59,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103055484] [2022-11-25 23:42:59,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:42:59,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-25 23:42:59,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:42:59,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-25 23:42:59,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=3834, Unknown=0, NotChecked=0, Total=4160 [2022-11-25 23:42:59,336 INFO L87 Difference]: Start difference. First operand 7634 states and 10367 transitions. Second operand has 40 states, 36 states have (on average 2.9166666666666665) internal successors, (105), 35 states have internal predecessors, (105), 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) [2022-11-25 23:43:03,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:43:03,763 INFO L93 Difference]: Finished difference Result 9155 states and 12518 transitions. [2022-11-25 23:43:03,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-25 23:43:03,764 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 36 states have (on average 2.9166666666666665) internal successors, (105), 35 states have internal predecessors, (105), 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 53 [2022-11-25 23:43:03,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:43:03,775 INFO L225 Difference]: With dead ends: 9155 [2022-11-25 23:43:03,775 INFO L226 Difference]: Without dead ends: 9155 [2022-11-25 23:43:03,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 114 SyntacticMatches, 8 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2909 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=1113, Invalid=8199, Unknown=0, NotChecked=0, Total=9312 [2022-11-25 23:43:03,776 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 2013 mSDsluCounter, 1611 mSDsCounter, 0 mSdLazyCounter, 1742 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2013 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 1980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 1742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:43:03,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2013 Valid, 1726 Invalid, 1980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 1742 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-25 23:43:03,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9155 states. [2022-11-25 23:43:03,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9155 to 6555. [2022-11-25 23:43:03,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6555 states, 5977 states have (on average 1.3478333612180022) internal successors, (8056), 6089 states have internal predecessors, (8056), 409 states have call successors, (409), 145 states have call predecessors, (409), 145 states have return successors, (409), 320 states have call predecessors, (409), 409 states have call successors, (409) [2022-11-25 23:43:03,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6555 states to 6555 states and 8874 transitions. [2022-11-25 23:43:03,881 INFO L78 Accepts]: Start accepts. Automaton has 6555 states and 8874 transitions. Word has length 53 [2022-11-25 23:43:03,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:43:03,882 INFO L495 AbstractCegarLoop]: Abstraction has 6555 states and 8874 transitions. [2022-11-25 23:43:03,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 36 states have (on average 2.9166666666666665) internal successors, (105), 35 states have internal predecessors, (105), 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) [2022-11-25 23:43:03,882 INFO L276 IsEmpty]: Start isEmpty. Operand 6555 states and 8874 transitions. [2022-11-25 23:43:03,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-25 23:43:03,883 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:43:03,884 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-25 23:43:03,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-25 23:43:04,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-11-25 23:43:04,099 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:43:04,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:43:04,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1099765272, now seen corresponding path program 1 times [2022-11-25 23:43:04,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:43:04,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447846581] [2022-11-25 23:43:04,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:43:04,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:43:04,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:43:06,419 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:43:06,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:43:06,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447846581] [2022-11-25 23:43:06,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447846581] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:43:06,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829125401] [2022-11-25 23:43:06,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:43:06,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:43:06,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:43:06,420 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:43:06,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-25 23:43:06,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:43:06,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 92 conjunts are in the unsatisfiable core [2022-11-25 23:43:06,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:43:06,892 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 23:43:06,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-25 23:43:07,131 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 [2022-11-25 23:43:07,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:07,279 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 36 treesize of output 27 [2022-11-25 23:43:07,643 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:43:07,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-25 23:43:07,813 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2022-11-25 23:43:07,916 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2022-11-25 23:43:08,031 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2022-11-25 23:43:08,211 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 23:43:08,211 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 56 [2022-11-25 23:43:08,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:08,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 35 [2022-11-25 23:43:08,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:08,910 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:43:08,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 46 [2022-11-25 23:43:09,003 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:43:09,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:43:10,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829125401] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:43:10,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [111229513] [2022-11-25 23:43:10,303 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2022-11-25 23:43:10,304 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:43:10,304 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:43:10,304 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:43:10,304 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:43:10,895 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:43:10,896 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-25 23:43:10,933 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:43:10,934 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 [2022-11-25 23:43:11,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:43:11,026 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 [2022-11-25 23:43:11,042 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 [2022-11-25 23:43:11,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:11,070 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 40 [2022-11-25 23:43:11,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:11,087 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 40 [2022-11-25 23:43:11,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:43:11,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:43:11,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:11,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:11,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:11,175 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 53 treesize of output 43 [2022-11-25 23:43:11,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:11,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:11,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:11,199 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 53 treesize of output 43 [2022-11-25 23:43:11,278 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-25 23:43:11,278 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 1 case distinctions, treesize of input 33 treesize of output 27 [2022-11-25 23:43:11,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:11,365 INFO L321 Elim1Store]: treesize reduction 92, result has 38.7 percent of original size [2022-11-25 23:43:11,366 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 3 case distinctions, treesize of input 49 treesize of output 78 [2022-11-25 23:43:11,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:11,469 INFO L321 Elim1Store]: treesize reduction 100, result has 33.3 percent of original size [2022-11-25 23:43:11,469 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 3 case distinctions, treesize of input 49 treesize of output 70 [2022-11-25 23:43:11,505 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-25 23:43:11,595 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-25 23:43:11,681 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 [2022-11-25 23:43:11,696 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 [2022-11-25 23:43:11,707 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 [2022-11-25 23:43:11,769 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 [2022-11-25 23:43:11,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:11,824 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-25 23:43:11,824 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 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-25 23:43:11,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:11,865 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-25 23:43:11,865 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 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-25 23:43:12,696 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:43:12,696 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 [2022-11-25 23:43:12,708 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 17 treesize of output 19 [2022-11-25 23:43:12,819 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 [2022-11-25 23:43:12,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:43:12,848 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 [2022-11-25 23:43:12,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:12,899 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 40 [2022-11-25 23:43:12,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:12,929 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 40 [2022-11-25 23:43:12,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:43:12,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:43:13,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:43:13,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:43:13,046 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 [2022-11-25 23:43:13,088 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-25 23:43:13,089 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 33 treesize of output 27 [2022-11-25 23:43:13,103 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 [2022-11-25 23:43:13,146 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 [2022-11-25 23:43:13,158 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 [2022-11-25 23:43:13,169 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 [2022-11-25 23:43:13,228 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 [2022-11-25 23:43:13,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:13,278 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-25 23:43:13,279 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 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-25 23:43:13,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:13,313 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-25 23:43:13,313 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 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-25 23:43:13,989 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:43:13,990 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-25 23:43:14,024 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:43:14,024 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 [2022-11-25 23:43:14,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:43:14,108 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 [2022-11-25 23:43:14,129 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 [2022-11-25 23:43:14,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:43:14,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:14,171 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 40 [2022-11-25 23:43:14,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:14,188 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 40 [2022-11-25 23:43:14,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:43:14,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:43:14,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:43:14,278 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 [2022-11-25 23:43:14,289 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 15 treesize of output 11 [2022-11-25 23:43:14,331 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-25 23:43:14,332 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 33 treesize of output 27 [2022-11-25 23:43:14,395 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 [2022-11-25 23:43:14,406 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 [2022-11-25 23:43:14,418 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 15 treesize of output 11 [2022-11-25 23:43:14,480 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 [2022-11-25 23:43:14,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:14,518 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-25 23:43:14,518 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 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-25 23:43:14,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:14,560 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-25 23:43:14,561 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 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-25 23:43:15,281 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:43:15,282 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-25 23:43:15,317 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:43:15,319 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 [2022-11-25 23:43:15,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:43:15,439 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 [2022-11-25 23:43:15,456 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 [2022-11-25 23:43:15,475 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 15 for LOIs [2022-11-25 23:43:15,476 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:43:23,910 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '243498#(and (= |~#list~0.offset| 0) (= (select |#valid| |~#list~0.base|) 1) (= (select (select |#memory_$Pointer$.offset| |~#list~0.base|) (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset|)) |ULTIMATE.start_main_~cursor~0#1.offset|) (= 3 |~#list~0.base|) (<= 0 ~i~0) (<= (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset| 4) (select |#length| |~#list~0.base|)) (< 0 |ULTIMATE.start_main_~length~0#1|) (not (= (select |#valid| |ULTIMATE.start_main_~cursor~0#1.base|) 1)) (= |ULTIMATE.start_main_~y~0#1| 0) (or (and (= ~unnamed2~0~ITEM_NEXT |ULTIMATE.start_main_~direction~0#1|) (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_main_~end_point~0#1|)) (and (= ~unnamed2~0~ITEM_PREV |ULTIMATE.start_main_~direction~0#1|) (= ~unnamed1~0~LIST_END |ULTIMATE.start_main_~end_point~0#1|))) (= |ULTIMATE.start_main_~z~0#1| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.base| |~#list~0.base|) (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset|)) |ULTIMATE.start_main_~cursor~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-25 23:43:23,910 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:43:23,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:43:23,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 40 [2022-11-25 23:43:23,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910996898] [2022-11-25 23:43:23,910 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:43:23,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-25 23:43:23,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:43:23,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-25 23:43:23,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=5351, Unknown=1, NotChecked=0, Total=5852 [2022-11-25 23:43:23,912 INFO L87 Difference]: Start difference. First operand 6555 states and 8874 transitions. Second operand has 41 states, 37 states have (on average 2.675675675675676) internal successors, (99), 36 states have internal predecessors, (99), 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) [2022-11-25 23:43:31,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:43:31,560 INFO L93 Difference]: Finished difference Result 8792 states and 11666 transitions. [2022-11-25 23:43:31,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-25 23:43:31,561 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 37 states have (on average 2.675675675675676) internal successors, (99), 36 states have internal predecessors, (99), 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 54 [2022-11-25 23:43:31,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:43:31,570 INFO L225 Difference]: With dead ends: 8792 [2022-11-25 23:43:31,570 INFO L226 Difference]: Without dead ends: 8792 [2022-11-25 23:43:31,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5399 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=1924, Invalid=14845, Unknown=1, NotChecked=0, Total=16770 [2022-11-25 23:43:31,572 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 2758 mSDsluCounter, 1627 mSDsCounter, 0 mSdLazyCounter, 2854 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2759 SdHoareTripleChecker+Valid, 1759 SdHoareTripleChecker+Invalid, 3120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 2854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:43:31,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2759 Valid, 1759 Invalid, 3120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 2854 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-25 23:43:31,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8792 states. [2022-11-25 23:43:31,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8792 to 6770. [2022-11-25 23:43:31,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6770 states, 6145 states have (on average 1.3345809601301872) internal successors, (8201), 6288 states have internal predecessors, (8201), 441 states have call successors, (441), 161 states have call predecessors, (441), 161 states have return successors, (441), 320 states have call predecessors, (441), 441 states have call successors, (441) [2022-11-25 23:43:31,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6770 states to 6770 states and 9083 transitions. [2022-11-25 23:43:31,716 INFO L78 Accepts]: Start accepts. Automaton has 6770 states and 9083 transitions. Word has length 54 [2022-11-25 23:43:31,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:43:31,716 INFO L495 AbstractCegarLoop]: Abstraction has 6770 states and 9083 transitions. [2022-11-25 23:43:31,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 37 states have (on average 2.675675675675676) internal successors, (99), 36 states have internal predecessors, (99), 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) [2022-11-25 23:43:31,717 INFO L276 IsEmpty]: Start isEmpty. Operand 6770 states and 9083 transitions. [2022-11-25 23:43:31,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-25 23:43:31,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:43:31,718 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-25 23:43:31,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-25 23:43:31,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-11-25 23:43:31,925 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 23:43:31,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:43:31,926 INFO L85 PathProgramCache]: Analyzing trace with hash 312503794, now seen corresponding path program 1 times [2022-11-25 23:43:31,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:43:31,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595128296] [2022-11-25 23:43:31,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:43:31,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:43:32,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:43:35,106 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:43:35,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:43:35,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595128296] [2022-11-25 23:43:35,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595128296] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:43:35,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086938621] [2022-11-25 23:43:35,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:43:35,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:43:35,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:43:35,108 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:43:35,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa93f054-7b33-4ee8-9f02-7184660de625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-25 23:43:35,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:43:35,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-25 23:43:35,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:43:35,673 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 23:43:35,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-25 23:43:35,986 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 [2022-11-25 23:43:36,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:36,186 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 47 treesize of output 30 [2022-11-25 23:43:36,716 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 23:43:36,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-25 23:43:36,898 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 54 [2022-11-25 23:43:37,019 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 54 [2022-11-25 23:43:37,139 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 54 [2022-11-25 23:43:37,350 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 23:43:37,350 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 54 [2022-11-25 23:43:37,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:37,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:43:37,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 33 [2022-11-25 23:43:38,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:38,191 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:43:38,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 42 [2022-11-25 23:43:38,303 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:43:38,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:43:40,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086938621] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:43:40,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [88945490] [2022-11-25 23:43:40,108 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-25 23:43:40,108 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:43:40,109 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:43:40,109 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:43:40,109 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:43:40,735 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:43:40,735 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 [2022-11-25 23:43:40,748 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 17 treesize of output 19 [2022-11-25 23:43:40,819 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 [2022-11-25 23:43:40,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:43:40,849 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 [2022-11-25 23:43:40,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:43:40,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:40,893 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 40 [2022-11-25 23:43:40,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:40,918 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 40 [2022-11-25 23:43:40,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:40,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:40,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:40,976 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 53 treesize of output 43 [2022-11-25 23:43:41,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:43:41,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:41,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:41,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:41,022 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 53 treesize of output 43 [2022-11-25 23:43:41,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:41,145 INFO L321 Elim1Store]: treesize reduction 92, result has 38.7 percent of original size [2022-11-25 23:43:41,145 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 3 case distinctions, treesize of input 49 treesize of output 78 [2022-11-25 23:43:41,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:41,244 INFO L321 Elim1Store]: treesize reduction 100, result has 33.3 percent of original size [2022-11-25 23:43:41,244 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 3 case distinctions, treesize of input 49 treesize of output 70 [2022-11-25 23:43:41,296 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-25 23:43:41,296 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 1 case distinctions, treesize of input 33 treesize of output 27 [2022-11-25 23:43:41,322 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-25 23:43:41,358 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-25 23:43:41,419 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 [2022-11-25 23:43:41,429 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 [2022-11-25 23:43:41,443 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 [2022-11-25 23:43:41,493 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 [2022-11-25 23:43:41,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:41,543 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-25 23:43:41,543 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 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-25 23:43:41,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:41,575 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-25 23:43:41,576 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 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-25 23:43:42,349 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:43:42,349 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-25 23:43:42,394 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:43:42,395 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 [2022-11-25 23:43:42,491 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 [2022-11-25 23:43:42,506 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 [2022-11-25 23:43:42,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:43:42,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:42,578 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 40 [2022-11-25 23:43:42,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:43:42,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:42,629 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 40 [2022-11-25 23:43:42,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:43:42,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:43:42,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:43:42,730 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 [2022-11-25 23:43:42,742 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 [2022-11-25 23:43:42,784 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-25 23:43:42,784 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 33 treesize of output 27 [2022-11-25 23:43:42,829 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 [2022-11-25 23:43:42,843 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 [2022-11-25 23:43:42,854 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 [2022-11-25 23:43:42,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:42,932 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-25 23:43:42,932 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 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-25 23:43:42,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:42,976 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-25 23:43:42,976 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 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-25 23:43:42,995 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 [2022-11-25 23:43:43,656 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:43:43,657 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-25 23:43:43,695 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:43:43,696 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 [2022-11-25 23:43:43,762 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 [2022-11-25 23:43:43,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:43:43,792 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 [2022-11-25 23:43:43,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:43,826 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 40 [2022-11-25 23:43:43,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:43:43,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:43,867 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 40 [2022-11-25 23:43:43,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:43:43,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:43:43,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:43:43,941 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 [2022-11-25 23:43:43,979 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-25 23:43:43,979 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 33 treesize of output 27 [2022-11-25 23:43:43,994 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 [2022-11-25 23:43:44,054 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 [2022-11-25 23:43:44,064 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 [2022-11-25 23:43:44,080 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 [2022-11-25 23:43:44,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:44,174 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-25 23:43:44,175 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 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-25 23:43:44,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:44,206 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-25 23:43:44,206 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 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-25 23:43:44,227 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 [2022-11-25 23:43:44,904 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:43:44,905 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-25 23:43:44,939 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:43:44,940 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 [2022-11-25 23:43:45,068 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 [2022-11-25 23:43:45,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 23:43:45,101 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 [2022-11-25 23:43:45,123 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 15 for LOIs [2022-11-25 23:43:45,125 INFO L180 IcfgInterpreter]: Interpretation finished