./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-manipulation/bubble_sort_linux-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_6988fca8-53e1-4784-b448-7d346a585ec6/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6988fca8-53e1-4784-b448-7d346a585ec6/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6988fca8-53e1-4784-b448-7d346a585ec6/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6988fca8-53e1-4784-b448-7d346a585ec6/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/heap-manipulation/bubble_sort_linux-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6988fca8-53e1-4784-b448-7d346a585ec6/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6988fca8-53e1-4784-b448-7d346a585ec6/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3b13662719be51a1d3330a7f40f7706daa8c7b2d4044bc92f854095c09c7c129 --- 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-b5237d8 [2022-11-22 01:40:47,350 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:40:47,352 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:40:47,377 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:40:47,378 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:40:47,384 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:40:47,386 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:40:47,390 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:40:47,392 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:40:47,398 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:40:47,400 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:40:47,402 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:40:47,402 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:40:47,408 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:40:47,410 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:40:47,413 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:40:47,414 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:40:47,415 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:40:47,417 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:40:47,423 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:40:47,425 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:40:47,427 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:40:47,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:40:47,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:40:47,440 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:40:47,440 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:40:47,440 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:40:47,442 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:40:47,443 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:40:47,444 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:40:47,445 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:40:47,446 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:40:47,448 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:40:47,449 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:40:47,450 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:40:47,451 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:40:47,451 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:40:47,452 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:40:47,452 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:40:47,453 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:40:47,453 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:40:47,454 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6988fca8-53e1-4784-b448-7d346a585ec6/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 01:40:47,502 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:40:47,502 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:40:47,503 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:40:47,503 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:40:47,503 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:40:47,504 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:40:47,504 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:40:47,504 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:40:47,504 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:40:47,505 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:40:47,505 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:40:47,505 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:40:47,505 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:40:47,505 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:40:47,506 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:40:47,506 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:40:47,506 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:40:47,507 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:40:47,508 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:40:47,508 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:40:47,509 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:40:47,509 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:40:47,509 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:40:47,509 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 01:40:47,509 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:40:47,510 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 01:40:47,510 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:40:47,510 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 01:40:47,510 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:40:47,510 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 01:40:47,511 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:40:47,511 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:40:47,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:40:47,511 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:40:47,512 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:40:47,512 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:40:47,512 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 01:40:47,512 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:40:47,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:40:47,513 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 01:40:47,513 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:40:47,513 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_6988fca8-53e1-4784-b448-7d346a585ec6/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6988fca8-53e1-4784-b448-7d346a585ec6/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3b13662719be51a1d3330a7f40f7706daa8c7b2d4044bc92f854095c09c7c129 [2022-11-22 01:40:47,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:40:47,809 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:40:47,811 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:40:47,812 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:40:47,813 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:40:47,813 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6988fca8-53e1-4784-b448-7d346a585ec6/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/heap-manipulation/bubble_sort_linux-2.i [2022-11-22 01:40:50,988 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:40:51,336 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:40:51,336 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6988fca8-53e1-4784-b448-7d346a585ec6/sv-benchmarks/c/heap-manipulation/bubble_sort_linux-2.i [2022-11-22 01:40:51,353 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6988fca8-53e1-4784-b448-7d346a585ec6/bin/utaipan-g80aRyZoba/data/1b58216ad/2a1ef369fe42494cb7211f4e3040b1df/FLAG9e8954279 [2022-11-22 01:40:51,368 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6988fca8-53e1-4784-b448-7d346a585ec6/bin/utaipan-g80aRyZoba/data/1b58216ad/2a1ef369fe42494cb7211f4e3040b1df [2022-11-22 01:40:51,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:40:51,373 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:40:51,374 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:40:51,375 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:40:51,378 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:40:51,379 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:40:51" (1/1) ... [2022-11-22 01:40:51,381 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d225af2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:40:51, skipping insertion in model container [2022-11-22 01:40:51,381 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:40:51" (1/1) ... [2022-11-22 01:40:51,389 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:40:51,428 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:40:51,877 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6988fca8-53e1-4784-b448-7d346a585ec6/sv-benchmarks/c/heap-manipulation/bubble_sort_linux-2.i[33822,33835] [2022-11-22 01:40:51,918 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:40:51,932 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:40:51,969 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6988fca8-53e1-4784-b448-7d346a585ec6/sv-benchmarks/c/heap-manipulation/bubble_sort_linux-2.i[33822,33835] [2022-11-22 01:40:51,995 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:40:52,046 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:40:52,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:40:52 WrapperNode [2022-11-22 01:40:52,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:40:52,048 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:40:52,048 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:40:52,049 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:40:52,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:40:52" (1/1) ... [2022-11-22 01:40:52,076 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:40:52" (1/1) ... [2022-11-22 01:40:52,115 INFO L138 Inliner]: procedures = 232, calls = 75, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 116 [2022-11-22 01:40:52,117 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:40:52,118 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:40:52,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:40:52,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:40:52,131 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:40:52" (1/1) ... [2022-11-22 01:40:52,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:40:52" (1/1) ... [2022-11-22 01:40:52,140 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:40:52" (1/1) ... [2022-11-22 01:40:52,141 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:40:52" (1/1) ... [2022-11-22 01:40:52,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:40:52" (1/1) ... [2022-11-22 01:40:52,174 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:40:52" (1/1) ... [2022-11-22 01:40:52,176 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:40:52" (1/1) ... [2022-11-22 01:40:52,178 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:40:52" (1/1) ... [2022-11-22 01:40:52,182 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:40:52,183 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:40:52,183 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:40:52,183 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:40:52,184 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:40:52" (1/1) ... [2022-11-22 01:40:52,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:40:52,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6988fca8-53e1-4784-b448-7d346a585ec6/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:40:52,224 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6988fca8-53e1-4784-b448-7d346a585ec6/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:40:52,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6988fca8-53e1-4784-b448-7d346a585ec6/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:40:52,266 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-22 01:40:52,266 INFO L130 BoogieDeclarations]: Found specification of procedure inspect [2022-11-22 01:40:52,267 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect [2022-11-22 01:40:52,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 01:40:52,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-22 01:40:52,267 INFO L130 BoogieDeclarations]: Found specification of procedure val_from_node [2022-11-22 01:40:52,267 INFO L138 BoogieDeclarations]: Found implementation of procedure val_from_node [2022-11-22 01:40:52,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 01:40:52,268 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2022-11-22 01:40:52,268 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2022-11-22 01:40:52,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 01:40:52,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-22 01:40:52,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:40:52,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-22 01:40:52,269 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2022-11-22 01:40:52,269 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2022-11-22 01:40:52,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:40:52,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:40:52,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:40:52,408 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:40:52,410 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:40:52,860 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:40:52,930 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:40:52,930 INFO L300 CfgBuilder]: Removed 41 assume(true) statements. [2022-11-22 01:40:52,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:40:52 BoogieIcfgContainer [2022-11-22 01:40:52,933 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:40:52,946 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:40:52,946 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:40:52,949 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:40:52,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:40:51" (1/3) ... [2022-11-22 01:40:52,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1570eec8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:40:52, skipping insertion in model container [2022-11-22 01:40:52,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:40:52" (2/3) ... [2022-11-22 01:40:52,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1570eec8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:40:52, skipping insertion in model container [2022-11-22 01:40:52,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:40:52" (3/3) ... [2022-11-22 01:40:52,953 INFO L112 eAbstractionObserver]: Analyzing ICFG bubble_sort_linux-2.i [2022-11-22 01:40:52,972 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:40:52,973 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 01:40:53,027 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:40:53,035 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@691ae5f8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:40:53,036 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 01:40:53,041 INFO L276 IsEmpty]: Start isEmpty. Operand has 105 states, 76 states have (on average 1.8421052631578947) internal successors, (140), 95 states have internal predecessors, (140), 23 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-22 01:40:53,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-22 01:40:53,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:40:53,051 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:40:53,052 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:40:53,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:40:53,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1563842699, now seen corresponding path program 1 times [2022-11-22 01:40:53,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:40:53,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979442700] [2022-11-22 01:40:53,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:40:53,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:40:53,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:40:53,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:53,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:40:53,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979442700] [2022-11-22 01:40:53,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979442700] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:40:53,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:40:53,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:40:53,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331453476] [2022-11-22 01:40:53,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:40:53,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-22 01:40:53,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:40:53,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-22 01:40:53,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 01:40:53,408 INFO L87 Difference]: Start difference. First operand has 105 states, 76 states have (on average 1.8421052631578947) internal successors, (140), 95 states have internal predecessors, (140), 23 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:40:53,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:40:53,477 INFO L93 Difference]: Finished difference Result 206 states and 369 transitions. [2022-11-22 01:40:53,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-22 01:40:53,480 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-22 01:40:53,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:40:53,488 INFO L225 Difference]: With dead ends: 206 [2022-11-22 01:40:53,488 INFO L226 Difference]: Without dead ends: 97 [2022-11-22 01:40:53,493 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 [2022-11-22 01:40:53,496 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:40:53,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 114 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:40:53,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-22 01:40:53,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-11-22 01:40:53,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 72 states have (on average 1.2777777777777777) internal successors, (92), 87 states have internal predecessors, (92), 21 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-22 01:40:53,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 118 transitions. [2022-11-22 01:40:53,566 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 118 transitions. Word has length 8 [2022-11-22 01:40:53,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:40:53,567 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 118 transitions. [2022-11-22 01:40:53,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:40:53,567 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 118 transitions. [2022-11-22 01:40:53,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-22 01:40:53,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:40:53,569 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:40:53,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:40:53,569 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:40:53,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:40:53,570 INFO L85 PathProgramCache]: Analyzing trace with hash 896972321, now seen corresponding path program 1 times [2022-11-22 01:40:53,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:40:53,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060515382] [2022-11-22 01:40:53,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:40:53,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:40:53,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:40:53,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:53,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:40:53,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060515382] [2022-11-22 01:40:53,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060515382] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:40:53,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:40:53,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 01:40:53,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212473241] [2022-11-22 01:40:53,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:40:53,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:40:53,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:40:53,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:40:53,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:40:53,916 INFO L87 Difference]: Start difference. First operand 97 states and 118 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:40:54,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:40:54,105 INFO L93 Difference]: Finished difference Result 99 states and 119 transitions. [2022-11-22 01:40:54,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:40:54,106 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-11-22 01:40:54,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:40:54,108 INFO L225 Difference]: With dead ends: 99 [2022-11-22 01:40:54,108 INFO L226 Difference]: Without dead ends: 96 [2022-11-22 01:40:54,108 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 [2022-11-22 01:40:54,110 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 168 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:40:54,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 205 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:40:54,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-22 01:40:54,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-11-22 01:40:54,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 72 states have (on average 1.2638888888888888) internal successors, (91), 86 states have internal predecessors, (91), 20 states have call successors, (20), 4 states have call predecessors, (20), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-22 01:40:54,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 116 transitions. [2022-11-22 01:40:54,126 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 116 transitions. Word has length 15 [2022-11-22 01:40:54,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:40:54,127 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 116 transitions. [2022-11-22 01:40:54,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:40:54,128 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 116 transitions. [2022-11-22 01:40:54,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-22 01:40:54,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:40:54,129 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:40:54,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 01:40:54,129 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:40:54,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:40:54,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1865049645, now seen corresponding path program 1 times [2022-11-22 01:40:54,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:40:54,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580164361] [2022-11-22 01:40:54,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:40:54,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:40:54,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:40:54,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:54,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:40:54,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580164361] [2022-11-22 01:40:54,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580164361] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:40:54,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:40:54,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-22 01:40:54,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135804349] [2022-11-22 01:40:54,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:40:54,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-22 01:40:54,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:40:54,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-22 01:40:54,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-22 01:40:54,989 INFO L87 Difference]: Start difference. First operand 96 states and 116 transitions. Second operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:40:55,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:40:55,623 INFO L93 Difference]: Finished difference Result 181 states and 217 transitions. [2022-11-22 01:40:55,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 01:40:55,624 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-11-22 01:40:55,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:40:55,626 INFO L225 Difference]: With dead ends: 181 [2022-11-22 01:40:55,626 INFO L226 Difference]: Without dead ends: 175 [2022-11-22 01:40:55,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-11-22 01:40:55,628 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 388 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:40:55,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 469 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 01:40:55,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-22 01:40:55,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 159. [2022-11-22 01:40:55,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 131 states have (on average 1.2671755725190839) internal successors, (166), 145 states have internal predecessors, (166), 23 states have call successors, (23), 6 states have call predecessors, (23), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-22 01:40:55,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 196 transitions. [2022-11-22 01:40:55,662 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 196 transitions. Word has length 18 [2022-11-22 01:40:55,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:40:55,662 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 196 transitions. [2022-11-22 01:40:55,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:40:55,663 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 196 transitions. [2022-11-22 01:40:55,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-22 01:40:55,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:40:55,664 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] [2022-11-22 01:40:55,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 01:40:55,665 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:40:55,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:40:55,665 INFO L85 PathProgramCache]: Analyzing trace with hash 2031360974, now seen corresponding path program 1 times [2022-11-22 01:40:55,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:40:55,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874146460] [2022-11-22 01:40:55,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:40:55,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:40:55,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:40:57,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:57,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:40:57,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874146460] [2022-11-22 01:40:57,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874146460] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:40:57,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:40:57,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-22 01:40:57,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861764932] [2022-11-22 01:40:57,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:40:57,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-22 01:40:57,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:40:57,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-22 01:40:57,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-11-22 01:40:57,014 INFO L87 Difference]: Start difference. First operand 159 states and 196 transitions. Second operand has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:40:58,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:40:58,113 INFO L93 Difference]: Finished difference Result 253 states and 308 transitions. [2022-11-22 01:40:58,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 01:40:58,114 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-11-22 01:40:58,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:40:58,115 INFO L225 Difference]: With dead ends: 253 [2022-11-22 01:40:58,116 INFO L226 Difference]: Without dead ends: 250 [2022-11-22 01:40:58,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-11-22 01:40:58,117 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 309 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:40:58,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 141 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 01:40:58,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-11-22 01:40:58,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 234. [2022-11-22 01:40:58,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 199 states have (on average 1.2613065326633166) internal successors, (251), 214 states have internal predecessors, (251), 28 states have call successors, (28), 8 states have call predecessors, (28), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-22 01:40:58,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 290 transitions. [2022-11-22 01:40:58,179 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 290 transitions. Word has length 21 [2022-11-22 01:40:58,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:40:58,179 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 290 transitions. [2022-11-22 01:40:58,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:40:58,179 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 290 transitions. [2022-11-22 01:40:58,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-22 01:40:58,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:40:58,180 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] [2022-11-22 01:40:58,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 01:40:58,181 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:40:58,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:40:58,182 INFO L85 PathProgramCache]: Analyzing trace with hash -66680349, now seen corresponding path program 1 times [2022-11-22 01:40:58,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:40:58,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784288977] [2022-11-22 01:40:58,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:40:58,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:40:58,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:40:59,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:59,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:40:59,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784288977] [2022-11-22 01:40:59,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784288977] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:40:59,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:40:59,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-22 01:40:59,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681681056] [2022-11-22 01:40:59,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:40:59,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-22 01:40:59,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:40:59,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-22 01:40:59,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-11-22 01:40:59,059 INFO L87 Difference]: Start difference. First operand 234 states and 290 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:41:00,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:41:00,125 INFO L93 Difference]: Finished difference Result 254 states and 309 transitions. [2022-11-22 01:41:00,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 01:41:00,127 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-11-22 01:41:00,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:41:00,130 INFO L225 Difference]: With dead ends: 254 [2022-11-22 01:41:00,130 INFO L226 Difference]: Without dead ends: 251 [2022-11-22 01:41:00,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-11-22 01:41:00,131 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 349 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:41:00,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 142 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 01:41:00,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-11-22 01:41:00,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 234. [2022-11-22 01:41:00,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 199 states have (on average 1.256281407035176) internal successors, (250), 214 states have internal predecessors, (250), 28 states have call successors, (28), 8 states have call predecessors, (28), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-22 01:41:00,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 289 transitions. [2022-11-22 01:41:00,192 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 289 transitions. Word has length 24 [2022-11-22 01:41:00,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:41:00,192 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 289 transitions. [2022-11-22 01:41:00,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:41:00,193 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 289 transitions. [2022-11-22 01:41:00,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-22 01:41:00,194 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:41:00,194 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:41:00,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 01:41:00,195 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:41:00,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:41:00,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1858713401, now seen corresponding path program 1 times [2022-11-22 01:41:00,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:41:00,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782869826] [2022-11-22 01:41:00,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:41:00,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:41:00,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:41:01,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:41:01,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:41:01,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782869826] [2022-11-22 01:41:01,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782869826] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:41:01,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:41:01,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-22 01:41:01,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7472227] [2022-11-22 01:41:01,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:41:01,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-22 01:41:01,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:41:01,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-22 01:41:01,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-22 01:41:01,621 INFO L87 Difference]: Start difference. First operand 234 states and 289 transitions. Second operand has 14 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:41:03,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:41:03,156 INFO L93 Difference]: Finished difference Result 251 states and 304 transitions. [2022-11-22 01:41:03,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 01:41:03,157 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-11-22 01:41:03,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:41:03,158 INFO L225 Difference]: With dead ends: 251 [2022-11-22 01:41:03,159 INFO L226 Difference]: Without dead ends: 248 [2022-11-22 01:41:03,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-11-22 01:41:03,160 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 353 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 1188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:41:03,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 169 Invalid, 1188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1144 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-22 01:41:03,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-22 01:41:03,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 234. [2022-11-22 01:41:03,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 199 states have (on average 1.2512562814070352) internal successors, (249), 214 states have internal predecessors, (249), 28 states have call successors, (28), 8 states have call predecessors, (28), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-22 01:41:03,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 288 transitions. [2022-11-22 01:41:03,220 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 288 transitions. Word has length 27 [2022-11-22 01:41:03,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:41:03,221 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 288 transitions. [2022-11-22 01:41:03,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:41:03,221 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 288 transitions. [2022-11-22 01:41:03,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-22 01:41:03,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:41:03,222 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:41:03,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 01:41:03,223 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:41:03,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:41:03,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1917225074, now seen corresponding path program 1 times [2022-11-22 01:41:03,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:41:03,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912793537] [2022-11-22 01:41:03,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:41:03,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:41:03,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:41:05,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:41:05,146 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:41:05,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912793537] [2022-11-22 01:41:05,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912793537] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:41:05,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967459545] [2022-11-22 01:41:05,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:41:05,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:41:05,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6988fca8-53e1-4784-b448-7d346a585ec6/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:41:05,151 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6988fca8-53e1-4784-b448-7d346a585ec6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:41:05,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6988fca8-53e1-4784-b448-7d346a585ec6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:41:05,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:41:05,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 128 conjunts are in the unsatisfiable core [2022-11-22 01:41:05,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:41:05,528 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:41:05,529 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 14 treesize of output 20 [2022-11-22 01:41:05,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 01:41:05,578 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:41:05,579 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 14 treesize of output 20 [2022-11-22 01:41:05,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 01:41:05,626 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:41:05,627 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 [2022-11-22 01:41:05,728 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 7 treesize of output 3 [2022-11-22 01:41:05,734 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 7 treesize of output 3 [2022-11-22 01:41:05,965 INFO L321 Elim1Store]: treesize reduction 77, result has 3.8 percent of original size [2022-11-22 01:41:05,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 54 treesize of output 77 [2022-11-22 01:41:05,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:05,982 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 48 [2022-11-22 01:41:06,017 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 11 [2022-11-22 01:41:06,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:06,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:06,152 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 26 treesize of output 28 [2022-11-22 01:41:06,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:06,160 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 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-22 01:41:06,292 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:41:06,292 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 30 treesize of output 32 [2022-11-22 01:41:06,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:06,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2022-11-22 01:41:06,330 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 01:41:06,331 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 [2022-11-22 01:41:06,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:06,408 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 24 treesize of output 8 [2022-11-22 01:41:06,621 INFO L321 Elim1Store]: treesize reduction 177, result has 36.1 percent of original size [2022-11-22 01:41:06,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 321 [2022-11-22 01:41:06,639 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 8 treesize of output 7 [2022-11-22 01:41:06,656 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 8 treesize of output 7 [2022-11-22 01:41:06,673 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 8 treesize of output 7 [2022-11-22 01:41:06,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:06,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:06,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 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 145 treesize of output 128 [2022-11-22 01:41:06,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 01:41:06,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:06,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:06,868 INFO L321 Elim1Store]: treesize reduction 33, result has 26.7 percent of original size [2022-11-22 01:41:06,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 125 treesize of output 128 [2022-11-22 01:41:06,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 01:41:06,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 01:41:07,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:07,041 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 64 treesize of output 11 [2022-11-22 01:41:07,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 01:41:07,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:07,569 INFO L321 Elim1Store]: treesize reduction 58, result has 24.7 percent of original size [2022-11-22 01:41:07,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 504 treesize of output 488 [2022-11-22 01:41:07,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:07,588 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 0 case distinctions, treesize of input 473 treesize of output 389 [2022-11-22 01:41:07,618 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 12 treesize of output 11 [2022-11-22 01:41:08,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:08,226 INFO L321 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2022-11-22 01:41:08,227 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 983 treesize of output 803 [2022-11-22 01:41:08,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:08,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:08,307 INFO L321 Elim1Store]: treesize reduction 37, result has 36.2 percent of original size [2022-11-22 01:41:08,308 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 2 case distinctions, treesize of input 160 treesize of output 147 [2022-11-22 01:41:08,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-22 01:41:08,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 01:41:08,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 01:41:08,726 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 7 treesize of output 3 [2022-11-22 01:41:08,795 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 16 treesize of output 8 [2022-11-22 01:41:08,846 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:41:08,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:41:09,062 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_532 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_gl_insert_~node~1#1.base| v_ArrVal_532) |c_~#gl_list~0.base|) (+ |c_~#gl_list~0.offset| 4)) |c_~#gl_list~0.base|))) is different from false [2022-11-22 01:41:09,324 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_563 Int) (v_ArrVal_558 (Array Int Int)) (v_ArrVal_560 (Array Int Int)) (v_ArrVal_562 (Array Int Int)) (v_ArrVal_555 (Array Int Int)) (v_ArrVal_532 (Array Int Int))) (not (= (select (select (store (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|))) (store (store (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_562) |c_ULTIMATE.start_gl_insert_~node~1#1.base| v_ArrVal_558) |c_~#gl_list~0.base| (store (select (store (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_555) |c_ULTIMATE.start_gl_insert_~node~1#1.base| v_ArrVal_560) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset| v_ArrVal_563))) |c_ULTIMATE.start_gl_insert_~node~1#1.base| v_ArrVal_532) |c_~#gl_list~0.base|) (+ |c_~#gl_list~0.offset| 4)) |c_~#gl_list~0.base|))) is different from false [2022-11-22 01:41:09,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967459545] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:41:09,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2116416344] [2022-11-22 01:41:09,347 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-22 01:41:09,347 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:41:09,351 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:41:09,356 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:41:09,357 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:41:09,445 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-22 01:41:09,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 22 treesize of output 42 [2022-11-22 01:41:09,473 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-22 01:41:09,474 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 26 treesize of output 32 [2022-11-22 01:41:09,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:09,500 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-22 01:41:09,501 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 32 treesize of output 27 [2022-11-22 01:41:09,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:09,529 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-22 01:41:09,530 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 32 treesize of output 27 [2022-11-22 01:41:09,599 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 01:41:09,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-22 01:41:09,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:09,749 INFO L321 Elim1Store]: treesize reduction 128, result has 32.3 percent of original size [2022-11-22 01:41:09,749 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 3 case distinctions, treesize of input 85 treesize of output 71 [2022-11-22 01:41:09,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:09,848 INFO L321 Elim1Store]: treesize reduction 147, result has 22.2 percent of original size [2022-11-22 01:41:09,848 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 3 case distinctions, treesize of input 85 treesize of output 52 [2022-11-22 01:41:09,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:09,997 INFO L321 Elim1Store]: treesize reduction 131, result has 34.8 percent of original size [2022-11-22 01:41:09,997 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 3 case distinctions, treesize of input 81 treesize of output 70 [2022-11-22 01:41:10,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:10,067 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 21 treesize of output 11 [2022-11-22 01:41:10,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:10,076 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 21 treesize of output 11 [2022-11-22 01:41:10,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 22 treesize of output 10 [2022-11-22 01:41:10,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 22 treesize of output 10 [2022-11-22 01:41:10,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:10,134 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 21 treesize of output 11 [2022-11-22 01:41:10,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:10,145 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 21 treesize of output 11 [2022-11-22 01:41:10,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 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 [2022-11-22 01:41:10,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 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 [2022-11-22 01:41:10,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 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 [2022-11-22 01:41:10,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:41:10,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:10,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-22 01:41:10,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:10,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-22 01:41:10,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:10,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:10,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:10,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:10,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-22 01:41:10,406 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-22 01:41:10,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 37 treesize of output 65 [2022-11-22 01:41:10,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 01:41:10,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 01:41:10,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 01:41:10,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 01:41:10,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 01:41:10,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 01:41:10,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 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 [2022-11-22 01:41:10,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 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 [2022-11-22 01:41:10,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 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 [2022-11-22 01:41:10,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:10,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:10,988 INFO L321 Elim1Store]: treesize reduction 72, result has 27.3 percent of original size [2022-11-22 01:41:10,989 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 4 case distinctions, treesize of input 236 treesize of output 240 [2022-11-22 01:41:11,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:11,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:11,063 INFO L321 Elim1Store]: treesize reduction 72, result has 27.3 percent of original size [2022-11-22 01:41:11,064 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 4 case distinctions, treesize of input 230 treesize of output 234 [2022-11-22 01:41:11,143 INFO L321 Elim1Store]: treesize reduction 76, result has 24.8 percent of original size [2022-11-22 01:41:11,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 case distinctions, treesize of input 215 treesize of output 224 [2022-11-22 01:41:11,240 INFO L321 Elim1Store]: treesize reduction 108, result has 23.4 percent of original size [2022-11-22 01:41:11,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 218 treesize of output 234 [2022-11-22 01:41:11,274 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 01:41:11,275 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 216 treesize of output 218 [2022-11-22 01:41:11,678 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-22 01:41:11,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 182 [2022-11-22 01:41:11,692 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-22 01:41:11,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 182 treesize of output 168 [2022-11-22 01:41:11,722 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 01:41:11,723 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 2 case distinctions, treesize of input 176 treesize of output 164 [2022-11-22 01:41:11,818 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-22 01:41:11,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 182 [2022-11-22 01:41:11,833 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-22 01:41:11,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 182 treesize of output 168 [2022-11-22 01:41:11,844 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 01:41:11,844 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 2 case distinctions, treesize of input 176 treesize of output 164 [2022-11-22 01:41:11,885 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 [2022-11-22 01:41:11,898 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 [2022-11-22 01:41:11,904 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 [2022-11-22 01:41:11,924 INFO L197 IcfgInterpreter]: Interpreting procedure list_add with input of size 29 for LOIs [2022-11-22 01:41:11,981 INFO L197 IcfgInterpreter]: Interpreting procedure inspect with input of size 63 for LOIs [2022-11-22 01:41:12,141 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 74 for LOIs [2022-11-22 01:41:12,155 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:41:16,772 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3789#(and (= 22 (select |#length| 2)) (= |~#gl_list~0.base| 3) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select |#length| 3) 8) (= (select |#valid| 1) 1) (= (select (select |#memory_$Pointer$.offset| |~#gl_list~0.base|) (+ 4 |~#gl_list~0.offset|)) |~#gl_list~0.offset|) (= (select |#valid| 0) 0) (= |~#gl_list~0.offset| 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (or (not (= |~#gl_list~0.base| (select (select |#memory_$Pointer$.base| |~#gl_list~0.base|) |~#gl_list~0.offset|))) (not (= |~#gl_list~0.offset| (select (select |#memory_$Pointer$.offset| |~#gl_list~0.base|) |~#gl_list~0.offset|)))) (exists ((|v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_7| Int)) (and (< |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_7| |#StackHeapBarrier|) (not (= |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_7| 1)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_7|) 12) 12) (not (= 3 |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_7|)) (not (= 2 |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_7|)) (= (select |#length| |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_7|) 20) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_7|) 12) |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_7|) (= (select |#valid| |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_7|) 1) (not (= |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_7| 0)))) (= (select (select |#memory_$Pointer$.base| |~#gl_list~0.base|) (+ 4 |~#gl_list~0.offset|)) |~#gl_list~0.base|) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 01:41:16,772 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:41:16,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:41:16,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2022-11-22 01:41:16,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54186478] [2022-11-22 01:41:16,773 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:41:16,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-22 01:41:16,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:41:16,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-22 01:41:16,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2086, Unknown=32, NotChecked=186, Total=2450 [2022-11-22 01:41:16,775 INFO L87 Difference]: Start difference. First operand 234 states and 288 transitions. Second operand has 29 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 01:41:19,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:41:25,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:41:25,206 INFO L93 Difference]: Finished difference Result 359 states and 429 transitions. [2022-11-22 01:41:25,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-22 01:41:25,207 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2022-11-22 01:41:25,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:41:25,210 INFO L225 Difference]: With dead ends: 359 [2022-11-22 01:41:25,210 INFO L226 Difference]: Without dead ends: 356 [2022-11-22 01:41:25,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=421, Invalid=3952, Unknown=57, NotChecked=262, Total=4692 [2022-11-22 01:41:25,213 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1803 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 2236 mSolverCounterSat, 376 mSolverCounterUnsat, 197 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1806 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 2809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 2236 IncrementalHoareTripleChecker+Invalid, 197 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:41:25,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1806 Valid, 282 Invalid, 2809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 2236 Invalid, 197 Unknown, 0 Unchecked, 6.0s Time] [2022-11-22 01:41:25,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-11-22 01:41:25,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 236. [2022-11-22 01:41:25,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 200 states have (on average 1.245) internal successors, (249), 215 states have internal predecessors, (249), 28 states have call successors, (28), 9 states have call predecessors, (28), 7 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-22 01:41:25,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 288 transitions. [2022-11-22 01:41:25,258 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 288 transitions. Word has length 29 [2022-11-22 01:41:25,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:41:25,258 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 288 transitions. [2022-11-22 01:41:25,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 01:41:25,259 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 288 transitions. [2022-11-22 01:41:25,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-22 01:41:25,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:41:25,260 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:41:25,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6988fca8-53e1-4784-b448-7d346a585ec6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 01:41:25,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6988fca8-53e1-4784-b448-7d346a585ec6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-22 01:41:25,468 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:41:25,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:41:25,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1990057232, now seen corresponding path program 1 times [2022-11-22 01:41:25,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:41:25,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983485452] [2022-11-22 01:41:25,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:41:25,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:41:25,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:41:26,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:41:26,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:41:26,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983485452] [2022-11-22 01:41:26,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983485452] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:41:26,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:41:26,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-22 01:41:26,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980200470] [2022-11-22 01:41:26,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:41:26,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-22 01:41:26,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:41:26,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-22 01:41:26,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-11-22 01:41:26,779 INFO L87 Difference]: Start difference. First operand 236 states and 288 transitions. Second operand has 12 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:41:28,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:41:28,175 INFO L93 Difference]: Finished difference Result 252 states and 302 transitions. [2022-11-22 01:41:28,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 01:41:28,176 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-11-22 01:41:28,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:41:28,178 INFO L225 Difference]: With dead ends: 252 [2022-11-22 01:41:28,178 INFO L226 Difference]: Without dead ends: 249 [2022-11-22 01:41:28,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-11-22 01:41:28,179 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 321 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:41:28,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 169 Invalid, 1100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1063 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-22 01:41:28,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-11-22 01:41:28,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 236. [2022-11-22 01:41:28,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 200 states have (on average 1.24) internal successors, (248), 215 states have internal predecessors, (248), 28 states have call successors, (28), 9 states have call predecessors, (28), 7 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-22 01:41:28,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 287 transitions. [2022-11-22 01:41:28,227 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 287 transitions. Word has length 30 [2022-11-22 01:41:28,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:41:28,229 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 287 transitions. [2022-11-22 01:41:28,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:41:28,229 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 287 transitions. [2022-11-22 01:41:28,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-22 01:41:28,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:41:28,234 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:41:28,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 01:41:28,234 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:41:28,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:41:28,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1829333469, now seen corresponding path program 1 times [2022-11-22 01:41:28,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:41:28,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629157266] [2022-11-22 01:41:28,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:41:28,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:41:28,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:41:30,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:41:30,212 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:41:30,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629157266] [2022-11-22 01:41:30,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629157266] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:41:30,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992037167] [2022-11-22 01:41:30,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:41:30,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:41:30,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6988fca8-53e1-4784-b448-7d346a585ec6/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:41:30,214 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6988fca8-53e1-4784-b448-7d346a585ec6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:41:30,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6988fca8-53e1-4784-b448-7d346a585ec6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 01:41:30,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:41:30,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 165 conjunts are in the unsatisfiable core [2022-11-22 01:41:30,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:41:30,511 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:41:30,511 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 27 [2022-11-22 01:41:30,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:30,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-22 01:41:30,543 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:41:30,544 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 [2022-11-22 01:41:30,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:30,617 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 17 treesize of output 7 [2022-11-22 01:41:30,741 INFO L321 Elim1Store]: treesize reduction 69, result has 33.0 percent of original size [2022-11-22 01:41:30,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 87 [2022-11-22 01:41:30,781 INFO L321 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2022-11-22 01:41:30,781 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 4 case distinctions, treesize of input 69 treesize of output 47 [2022-11-22 01:41:30,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 20 [2022-11-22 01:41:30,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2022-11-22 01:41:30,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-22 01:41:30,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 01:41:30,867 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-22 01:41:30,868 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 40 [2022-11-22 01:41:30,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 01:41:33,786 INFO L321 Elim1Store]: treesize reduction 205, result has 1.4 percent of original size [2022-11-22 01:41:33,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 6 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 156 treesize of output 484 [2022-11-22 01:41:33,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:33,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:33,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:33,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:33,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:33,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 5 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 113 treesize of output 338 [2022-11-22 01:41:33,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:34,091 INFO L321 Elim1Store]: treesize reduction 84, result has 20.0 percent of original size [2022-11-22 01:41:34,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 554 treesize of output 532 [2022-11-22 01:41:34,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:34,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:34,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 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 64 treesize of output 71 [2022-11-22 01:41:34,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:34,824 INFO L321 Elim1Store]: treesize reduction 52, result has 32.5 percent of original size [2022-11-22 01:41:34,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 64 [2022-11-22 01:41:49,076 WARN L233 SmtUtils]: Spent 13.48s on a formula simplification. DAG size of input: 130 DAG size of output: 114 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:41:49,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:49,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 5 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 380 treesize of output 764 [2022-11-22 01:41:49,221 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 340 treesize of output 340 [2022-11-22 01:41:49,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:49,764 INFO L321 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2022-11-22 01:41:49,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 327 treesize of output 439 [2022-11-22 01:41:49,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:49,777 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 0 case distinctions, treesize of input 415 treesize of output 315 [2022-11-22 01:41:49,843 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 88 treesize of output 5 [2022-11-22 01:41:49,984 INFO L321 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-11-22 01:41:49,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 680 treesize of output 736 [2022-11-22 01:41:50,130 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 98 treesize of output 15 [2022-11-22 01:41:50,210 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 255 treesize of output 1 [2022-11-22 01:41:50,726 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 01:41:50,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-22 01:41:50,759 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 424 treesize of output 426 [2022-11-22 01:41:50,781 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-22 01:41:50,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 147 treesize of output 133 [2022-11-22 01:41:50,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:50,979 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 18 treesize of output 8 [2022-11-22 01:41:51,271 INFO L321 Elim1Store]: treesize reduction 61, result has 19.7 percent of original size [2022-11-22 01:41:51,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 191 treesize of output 194 [2022-11-22 01:41:51,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:51,290 INFO L321 Elim1Store]: treesize reduction 51, result has 1.9 percent of original size [2022-11-22 01:41:51,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 216 treesize of output 159 [2022-11-22 01:41:51,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:51,329 INFO L321 Elim1Store]: treesize reduction 24, result has 52.0 percent of original size [2022-11-22 01:41:51,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 230 treesize of output 221 [2022-11-22 01:41:51,376 INFO L321 Elim1Store]: treesize reduction 61, result has 19.7 percent of original size [2022-11-22 01:41:51,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 189 treesize of output 222 [2022-11-22 01:41:51,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 237 [2022-11-22 01:41:51,798 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-22 01:41:51,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 254 treesize of output 219 [2022-11-22 01:41:51,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:51,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 199 [2022-11-22 01:41:51,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:51,841 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 80 [2022-11-22 01:41:51,850 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:41:51,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2022-11-22 01:41:52,407 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 23 treesize of output 15 [2022-11-22 01:41:52,410 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 35 treesize of output 19 [2022-11-22 01:41:52,479 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:41:52,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:41:53,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992037167] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:41:53,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [214039322] [2022-11-22 01:41:53,586 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-22 01:41:53,587 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:41:53,588 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:41:53,588 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:41:53,588 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:41:53,665 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-22 01:41:53,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 22 treesize of output 42 [2022-11-22 01:41:53,738 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 01:41:53,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-22 01:41:53,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:53,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 23 [2022-11-22 01:41:53,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:53,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 23 [2022-11-22 01:41:53,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-22 01:41:53,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:53,893 INFO L321 Elim1Store]: treesize reduction 147, result has 22.2 percent of original size [2022-11-22 01:41:53,894 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 3 case distinctions, treesize of input 85 treesize of output 52 [2022-11-22 01:41:53,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:54,028 INFO L321 Elim1Store]: treesize reduction 128, result has 32.3 percent of original size [2022-11-22 01:41:54,028 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 3 case distinctions, treesize of input 85 treesize of output 71 [2022-11-22 01:41:54,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:54,204 INFO L321 Elim1Store]: treesize reduction 131, result has 34.8 percent of original size [2022-11-22 01:41:54,204 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 3 case distinctions, treesize of input 81 treesize of output 70 [2022-11-22 01:41:54,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 22 treesize of output 10 [2022-11-22 01:41:54,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:54,258 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 17 treesize of output 7 [2022-11-22 01:41:54,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:54,267 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 17 treesize of output 7 [2022-11-22 01:41:54,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 22 treesize of output 10 [2022-11-22 01:41:54,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:54,313 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 17 treesize of output 7 [2022-11-22 01:41:54,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:54,323 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 17 treesize of output 7 [2022-11-22 01:41:54,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 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 [2022-11-22 01:41:54,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 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 [2022-11-22 01:41:54,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 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 [2022-11-22 01:41:54,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:54,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-22 01:41:54,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:54,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-22 01:41:54,534 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-22 01:41:54,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 37 treesize of output 65 [2022-11-22 01:41:54,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-22 01:41:54,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 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 [2022-11-22 01:41:54,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 01:41:54,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 01:41:54,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 01:41:54,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 01:41:54,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 01:41:54,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 01:41:54,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 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 [2022-11-22 01:41:54,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 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 [2022-11-22 01:41:54,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 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 [2022-11-22 01:41:55,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:55,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:55,111 INFO L321 Elim1Store]: treesize reduction 72, result has 27.3 percent of original size [2022-11-22 01:41:55,112 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 4 case distinctions, treesize of input 236 treesize of output 240 [2022-11-22 01:41:55,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:55,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:55,194 INFO L321 Elim1Store]: treesize reduction 72, result has 27.3 percent of original size [2022-11-22 01:41:55,195 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 4 case distinctions, treesize of input 230 treesize of output 234 [2022-11-22 01:41:55,320 INFO L321 Elim1Store]: treesize reduction 96, result has 31.9 percent of original size [2022-11-22 01:41:55,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 220 treesize of output 248 [2022-11-22 01:41:55,378 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-11-22 01:41:55,378 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 4 new quantified variables, introduced 4 case distinctions, treesize of input 213 treesize of output 222 [2022-11-22 01:41:55,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 218 [2022-11-22 01:41:55,816 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-22 01:41:55,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 298 treesize of output 274 [2022-11-22 01:41:55,834 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-22 01:41:55,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 274 treesize of output 250 [2022-11-22 01:41:55,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 258 treesize of output 238 [2022-11-22 01:41:55,956 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-22 01:41:55,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 298 treesize of output 274 [2022-11-22 01:41:55,972 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-22 01:41:55,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 274 treesize of output 250 [2022-11-22 01:41:55,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 258 treesize of output 238 [2022-11-22 01:41:56,035 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 [2022-11-22 01:41:56,040 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 [2022-11-22 01:41:56,045 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 [2022-11-22 01:41:56,079 INFO L197 IcfgInterpreter]: Interpreting procedure list_add with input of size 29 for LOIs [2022-11-22 01:41:56,130 INFO L197 IcfgInterpreter]: Interpreting procedure inspect with input of size 63 for LOIs [2022-11-22 01:41:56,317 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 79 for LOIs [2022-11-22 01:41:56,332 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:42:02,565 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5658#(and (= 22 (select |#length| 2)) (= (select (select |#memory_$Pointer$.base| |~#gl_list~0.base|) (+ 4 |~#gl_list~0.offset|)) 0) (= |~#gl_list~0.base| 3) (exists ((|v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_17| Int)) (and (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_17|) 12) 12) (not (= 0 |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_17|)) (= (select |#valid| |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_17|) 1) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_17|) 12) |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_17|) (< |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_17| |#StackHeapBarrier|) (= 20 (select |#length| |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_17|)) (not (= 1 |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_17|)) (not (= 3 |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_17|)) (not (= 2 |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_17|)))) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select |#length| 3) 8) (= (select (select |#memory_$Pointer$.offset| |~#gl_list~0.base|) (+ 4 |~#gl_list~0.offset|)) 0) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= |~#gl_list~0.offset| 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (or (not (= |~#gl_list~0.base| (select (select |#memory_$Pointer$.base| |~#gl_list~0.base|) |~#gl_list~0.offset|))) (not (= |~#gl_list~0.offset| (select (select |#memory_$Pointer$.offset| |~#gl_list~0.base|) |~#gl_list~0.offset|)))) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 01:42:02,565 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:42:02,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:42:02,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2022-11-22 01:42:02,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287505228] [2022-11-22 01:42:02,566 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:42:02,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-22 01:42:02,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:42:02,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-22 01:42:02,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=2654, Unknown=22, NotChecked=0, Total=2862 [2022-11-22 01:42:02,568 INFO L87 Difference]: Start difference. First operand 236 states and 287 transitions. Second operand has 31 states, 23 states have (on average 2.217391304347826) internal successors, (51), 21 states have internal predecessors, (51), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 01:42:09,622 WARN L233 SmtUtils]: Spent 5.05s on a formula simplification. DAG size of input: 107 DAG size of output: 92 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:42:12,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:42:20,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:42:26,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:42:26,926 INFO L93 Difference]: Finished difference Result 407 states and 483 transitions. [2022-11-22 01:42:26,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-22 01:42:26,927 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 23 states have (on average 2.217391304347826) internal successors, (51), 21 states have internal predecessors, (51), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 32 [2022-11-22 01:42:26,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:42:26,929 INFO L225 Difference]: With dead ends: 407 [2022-11-22 01:42:26,929 INFO L226 Difference]: Without dead ends: 401 [2022-11-22 01:42:26,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 36.1s TimeCoverageRelationStatistics Valid=607, Invalid=6493, Unknown=40, NotChecked=0, Total=7140 [2022-11-22 01:42:26,933 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 1302 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 4161 mSolverCounterSat, 255 mSolverCounterUnsat, 205 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1302 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 4621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 4161 IncrementalHoareTripleChecker+Invalid, 205 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:42:26,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1302 Valid, 591 Invalid, 4621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 4161 Invalid, 205 Unknown, 0 Unchecked, 12.8s Time] [2022-11-22 01:42:26,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-11-22 01:42:26,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 253. [2022-11-22 01:42:26,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 217 states have (on average 1.2165898617511521) internal successors, (264), 231 states have internal predecessors, (264), 28 states have call successors, (28), 10 states have call predecessors, (28), 7 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-22 01:42:26,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 303 transitions. [2022-11-22 01:42:26,999 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 303 transitions. Word has length 32 [2022-11-22 01:42:26,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:42:26,999 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 303 transitions. [2022-11-22 01:42:26,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 23 states have (on average 2.217391304347826) internal successors, (51), 21 states have internal predecessors, (51), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 01:42:27,000 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 303 transitions. [2022-11-22 01:42:27,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-22 01:42:27,000 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:42:27,001 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:42:27,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6988fca8-53e1-4784-b448-7d346a585ec6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 01:42:27,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6988fca8-53e1-4784-b448-7d346a585ec6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:42:27,201 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:42:27,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:42:27,202 INFO L85 PathProgramCache]: Analyzing trace with hash -2141730359, now seen corresponding path program 1 times [2022-11-22 01:42:27,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:42:27,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629623277] [2022-11-22 01:42:27,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:42:27,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:42:27,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:42:27,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:42:27,990 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:42:27,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629623277] [2022-11-22 01:42:27,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629623277] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:42:27,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:42:27,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-22 01:42:27,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909370545] [2022-11-22 01:42:27,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:42:27,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-22 01:42:27,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:42:27,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-22 01:42:27,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-11-22 01:42:27,992 INFO L87 Difference]: Start difference. First operand 253 states and 303 transitions. Second operand has 12 states, 10 states have (on average 2.9) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:42:29,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:42:29,406 INFO L93 Difference]: Finished difference Result 301 states and 359 transitions. [2022-11-22 01:42:29,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-22 01:42:29,407 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.9) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-11-22 01:42:29,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:42:29,408 INFO L225 Difference]: With dead ends: 301 [2022-11-22 01:42:29,408 INFO L226 Difference]: Without dead ends: 298 [2022-11-22 01:42:29,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2022-11-22 01:42:29,410 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 407 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:42:29,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 159 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 995 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-22 01:42:29,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-11-22 01:42:29,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 256. [2022-11-22 01:42:29,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 220 states have (on average 1.209090909090909) internal successors, (266), 234 states have internal predecessors, (266), 28 states have call successors, (28), 10 states have call predecessors, (28), 7 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-22 01:42:29,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 305 transitions. [2022-11-22 01:42:29,492 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 305 transitions. Word has length 33 [2022-11-22 01:42:29,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:42:29,492 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 305 transitions. [2022-11-22 01:42:29,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.9) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:42:29,493 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 305 transitions. [2022-11-22 01:42:29,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-22 01:42:29,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:42:29,494 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:42:29,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-22 01:42:29,494 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:42:29,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:42:29,495 INFO L85 PathProgramCache]: Analyzing trace with hash 929776377, now seen corresponding path program 1 times [2022-11-22 01:42:29,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:42:29,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359031404] [2022-11-22 01:42:29,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:42:29,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:42:29,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:42:32,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:42:32,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:42:32,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359031404] [2022-11-22 01:42:32,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359031404] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:42:32,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580163324] [2022-11-22 01:42:32,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:42:32,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:42:32,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6988fca8-53e1-4784-b448-7d346a585ec6/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:42:32,339 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6988fca8-53e1-4784-b448-7d346a585ec6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:42:32,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6988fca8-53e1-4784-b448-7d346a585ec6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 01:42:32,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:42:32,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 185 conjunts are in the unsatisfiable core [2022-11-22 01:42:32,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:42:32,663 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:42:32,663 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 16 treesize of output 22 [2022-11-22 01:42:32,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 01:42:32,705 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:42:32,705 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 [2022-11-22 01:42:32,720 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 [2022-11-22 01:42:32,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:32,807 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 17 treesize of output 7 [2022-11-22 01:42:32,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-22 01:42:33,164 INFO L321 Elim1Store]: treesize reduction 87, result has 3.3 percent of original size [2022-11-22 01:42:33,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 156 treesize of output 140 [2022-11-22 01:42:33,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:33,228 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2022-11-22 01:42:33,228 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 121 treesize of output 123 [2022-11-22 01:42:33,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:33,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 71 [2022-11-22 01:42:33,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:33,261 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 58 treesize of output 34 [2022-11-22 01:42:33,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:33,303 INFO L321 Elim1Store]: treesize reduction 32, result has 49.2 percent of original size [2022-11-22 01:42:33,306 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 2 case distinctions, treesize of input 23 treesize of output 41 [2022-11-22 01:42:33,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:33,316 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 81 treesize of output 53 [2022-11-22 01:42:33,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:33,352 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:42:33,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 38 treesize of output 55 [2022-11-22 01:42:33,407 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 15 treesize of output 19 [2022-11-22 01:42:33,419 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 15 treesize of output 19 [2022-11-22 01:42:33,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:33,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:33,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:33,609 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 01:42:33,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 121 treesize of output 91 [2022-11-22 01:42:33,619 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 74 treesize of output 66 [2022-11-22 01:42:33,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:33,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:33,864 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 61 treesize of output 64 [2022-11-22 01:42:33,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:33,881 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-22 01:42:33,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 89 treesize of output 85 [2022-11-22 01:42:33,918 INFO L321 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2022-11-22 01:42:33,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-22 01:42:34,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:34,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:34,035 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 01:42:34,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 45 [2022-11-22 01:42:34,043 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 35 treesize of output 19 [2022-11-22 01:42:34,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:34,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:34,384 INFO L321 Elim1Store]: treesize reduction 74, result has 27.5 percent of original size [2022-11-22 01:42:34,385 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 5 new quantified variables, introduced 5 case distinctions, treesize of input 188 treesize of output 139 [2022-11-22 01:42:34,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:34,415 INFO L321 Elim1Store]: treesize reduction 42, result has 10.6 percent of original size [2022-11-22 01:42:34,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 166 treesize of output 143 [2022-11-22 01:42:34,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:34,423 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 116 [2022-11-22 01:42:34,450 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-22 01:42:34,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 77 [2022-11-22 01:42:34,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:34,460 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 74 treesize of output 70 [2022-11-22 01:42:34,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:34,470 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 44 treesize of output 44 [2022-11-22 01:42:35,058 INFO L321 Elim1Store]: treesize reduction 114, result has 35.2 percent of original size [2022-11-22 01:42:35,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 344 treesize of output 330 [2022-11-22 01:42:35,210 INFO L321 Elim1Store]: treesize reduction 162, result has 31.6 percent of original size [2022-11-22 01:42:35,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 316 treesize of output 340 [2022-11-22 01:45:09,471 WARN L233 SmtUtils]: Spent 51.41s on a formula simplification. DAG size of input: 1219 DAG size of output: 105 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:45:13,434 INFO L321 Elim1Store]: treesize reduction 204, result has 50.1 percent of original size [2022-11-22 01:45:13,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 3 disjoint index pairs (out of 55 index pairs), introduced 12 new quantified variables, introduced 54 case distinctions, treesize of input 360 treesize of output 403 [2022-11-22 01:45:13,827 INFO L321 Elim1Store]: treesize reduction 168, result has 50.7 percent of original size [2022-11-22 01:45:13,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 43 case distinctions, treesize of input 200 treesize of output 304 [2022-11-22 01:46:18,508 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:46:18,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:46:19,021 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1262 (Array Int Int)) (v_ArrVal_1261 (Array Int Int))) (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_gl_insert_~node~1#1.base| v_ArrVal_1262)) (.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_gl_insert_~node~1#1.base| v_ArrVal_1261)) (.cse4 (+ |c_~#gl_list~0.offset| 4))) (let ((.cse2 (select (select .cse0 |c_~#gl_list~0.base|) .cse4)) (.cse1 (select (select .cse3 |c_~#gl_list~0.base|) .cse4))) (or (not (= (select (select .cse0 .cse1) .cse2) .cse2)) (not (= (select (select .cse3 .cse1) .cse2) .cse1)))))) is different from false [2022-11-22 01:46:19,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580163324] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:46:19,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [196646008] [2022-11-22 01:46:19,764 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-22 01:46:19,764 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:46:19,765 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:46:19,765 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:46:19,765 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:46:19,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:46:19,808 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-22 01:46:19,809 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 32 treesize of output 27 [2022-11-22 01:46:19,860 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-22 01:46:19,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 22 treesize of output 42 [2022-11-22 01:46:19,917 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 01:46:19,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-22 01:46:19,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:46:19,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 23 [2022-11-22 01:46:19,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-22 01:46:19,998 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-22 01:46:19,998 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 1 case distinctions, treesize of input 35 treesize of output 19 [2022-11-22 01:46:20,029 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-22 01:46:20,029 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 39 treesize of output 31 [2022-11-22 01:46:20,072 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-22 01:46:20,073 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 31 [2022-11-22 01:46:20,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:46:20,189 INFO L321 Elim1Store]: treesize reduction 128, result has 32.3 percent of original size [2022-11-22 01:46:20,190 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 3 case distinctions, treesize of input 85 treesize of output 71 [2022-11-22 01:46:20,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:46:20,305 INFO L321 Elim1Store]: treesize reduction 147, result has 22.2 percent of original size [2022-11-22 01:46:20,306 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 3 case distinctions, treesize of input 85 treesize of output 52 [2022-11-22 01:46:20,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:46:20,341 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 17 treesize of output 7 [2022-11-22 01:46:20,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 22 treesize of output 10 [2022-11-22 01:46:20,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:46:20,359 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 21 treesize of output 11 [2022-11-22 01:46:20,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:46:20,391 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 17 treesize of output 7 [2022-11-22 01:46:20,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:46:20,399 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 21 treesize of output 11 [2022-11-22 01:46:20,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 22 treesize of output 10 [2022-11-22 01:46:20,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 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 [2022-11-22 01:46:20,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 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 [2022-11-22 01:46:20,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 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 [2022-11-22 01:46:20,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:46:20,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:46:20,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-22 01:46:20,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:46:20,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-22 01:46:20,631 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-22 01:46:20,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 37 treesize of output 65 [2022-11-22 01:46:20,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-22 01:46:20,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 01:46:20,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 01:46:20,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 01:46:20,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 01:46:20,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 01:46:20,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 01:46:20,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 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 [2022-11-22 01:46:20,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 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 [2022-11-22 01:46:20,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 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 [2022-11-22 01:46:21,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:46:21,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:46:21,179 INFO L321 Elim1Store]: treesize reduction 72, result has 27.3 percent of original size [2022-11-22 01:46:21,179 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 4 case distinctions, treesize of input 236 treesize of output 240 [2022-11-22 01:46:21,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:46:21,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:46:21,257 INFO L321 Elim1Store]: treesize reduction 72, result has 27.3 percent of original size [2022-11-22 01:46:21,258 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 4 case distinctions, treesize of input 230 treesize of output 234 [2022-11-22 01:46:21,334 INFO L321 Elim1Store]: treesize reduction 76, result has 24.8 percent of original size [2022-11-22 01:46:21,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 case distinctions, treesize of input 215 treesize of output 224 [2022-11-22 01:46:21,428 INFO L321 Elim1Store]: treesize reduction 108, result has 23.4 percent of original size [2022-11-22 01:46:21,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 218 treesize of output 234 [2022-11-22 01:46:21,459 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 01:46:21,459 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 216 treesize of output 218 [2022-11-22 01:46:21,746 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-22 01:46:21,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 182 [2022-11-22 01:46:21,760 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-22 01:46:21,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 182 treesize of output 168 [2022-11-22 01:46:21,773 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 01:46:21,773 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 2 case distinctions, treesize of input 176 treesize of output 164 [2022-11-22 01:46:21,842 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-22 01:46:21,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 182 [2022-11-22 01:46:21,857 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-22 01:46:21,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 182 treesize of output 168 [2022-11-22 01:46:21,869 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 01:46:21,870 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 2 case distinctions, treesize of input 176 treesize of output 164 [2022-11-22 01:46:21,909 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 [2022-11-22 01:46:21,914 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 [2022-11-22 01:46:21,934 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 [2022-11-22 01:46:21,955 INFO L197 IcfgInterpreter]: Interpreting procedure list_add with input of size 29 for LOIs [2022-11-22 01:46:22,017 INFO L197 IcfgInterpreter]: Interpreting procedure inspect with input of size 63 for LOIs [2022-11-22 01:46:22,258 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 88 for LOIs [2022-11-22 01:46:22,272 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:46:29,411 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7768#(and (= (select (select |#memory_$Pointer$.offset| |~#gl_list~0.base|) (+ 4 |~#gl_list~0.offset|)) (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |~#gl_list~0.base|) (+ 4 |~#gl_list~0.offset|))) (select (select |#memory_$Pointer$.offset| |~#gl_list~0.base|) (+ 4 |~#gl_list~0.offset|)))) (= 22 (select |#length| 2)) (= |~#gl_list~0.base| 3) (= 2 (select |#length| 1)) (or (not (= (select (select |#memory_$Pointer$.offset| |~#gl_list~0.base|) (+ 4 |~#gl_list~0.offset|)) 0)) (not (= (select (select |#memory_$Pointer$.base| |~#gl_list~0.base|) (+ 4 |~#gl_list~0.offset|)) 0))) (= (select |#valid| 3) 1) (= (select |#length| 3) 8) (= (select (select |#memory_$Pointer$.base| |~#gl_list~0.base|) (+ 4 |~#gl_list~0.offset|)) (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |~#gl_list~0.base|) (+ 4 |~#gl_list~0.offset|))) (select (select |#memory_$Pointer$.offset| |~#gl_list~0.base|) (+ 4 |~#gl_list~0.offset|)))) (= (select |#valid| 1) 1) (exists ((|v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_27| Int)) (and (not (= 3 |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_27|)) (= 20 (select |#length| |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_27|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_27|) 12) |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_27|) (not (= 0 |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_27|)) (not (= 1 |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_27|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_27|) 12) 12) (not (= 2 |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_27|)) (= (select |#valid| |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_27|) 1) (< |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_27| |#StackHeapBarrier|))) (= (select |#valid| 0) 0) (= |~#gl_list~0.offset| 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (or (not (= |~#gl_list~0.base| (select (select |#memory_$Pointer$.base| |~#gl_list~0.base|) |~#gl_list~0.offset|))) (not (= |~#gl_list~0.offset| (select (select |#memory_$Pointer$.offset| |~#gl_list~0.base|) |~#gl_list~0.offset|)))) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 01:46:29,411 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:46:29,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:46:29,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 30 [2022-11-22 01:46:29,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003728826] [2022-11-22 01:46:29,411 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:46:29,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-22 01:46:29,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:46:29,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-22 01:46:29,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2868, Unknown=32, NotChecked=108, Total=3192 [2022-11-22 01:46:29,413 INFO L87 Difference]: Start difference. First operand 256 states and 305 transitions. Second operand has 31 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 21 states have internal predecessors, (57), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 01:46:48,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:46:48,976 INFO L93 Difference]: Finished difference Result 388 states and 459 transitions. [2022-11-22 01:46:48,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-22 01:46:48,977 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 21 states have internal predecessors, (57), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 35 [2022-11-22 01:46:48,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:46:48,980 INFO L225 Difference]: With dead ends: 388 [2022-11-22 01:46:48,980 INFO L226 Difference]: Without dead ends: 385 [2022-11-22 01:46:48,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 76.3s TimeCoverageRelationStatistics Valid=389, Invalid=4984, Unknown=33, NotChecked=144, Total=5550 [2022-11-22 01:46:48,983 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 1044 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 3836 mSolverCounterSat, 163 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1044 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 4019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 3836 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:46:48,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1044 Valid, 566 Invalid, 4019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 3836 Invalid, 20 Unknown, 0 Unchecked, 8.3s Time] [2022-11-22 01:46:48,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-11-22 01:46:49,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 333. [2022-11-22 01:46:49,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 289 states have (on average 1.2110726643598615) internal successors, (350), 304 states have internal predecessors, (350), 33 states have call successors, (33), 13 states have call predecessors, (33), 10 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-22 01:46:49,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 398 transitions. [2022-11-22 01:46:49,095 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 398 transitions. Word has length 35 [2022-11-22 01:46:49,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:46:49,095 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 398 transitions. [2022-11-22 01:46:49,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 21 states have internal predecessors, (57), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 01:46:49,096 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 398 transitions. [2022-11-22 01:46:49,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-22 01:46:49,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:46:49,097 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:46:49,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6988fca8-53e1-4784-b448-7d346a585ec6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 01:46:49,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6988fca8-53e1-4784-b448-7d346a585ec6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:46:49,303 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:46:49,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:46:49,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1552238075, now seen corresponding path program 1 times [2022-11-22 01:46:49,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:46:49,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44186845] [2022-11-22 01:46:49,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:46:49,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:46:49,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:46:50,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:46:50,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:46:50,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44186845] [2022-11-22 01:46:50,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44186845] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:46:50,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:46:50,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-22 01:46:50,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207293360] [2022-11-22 01:46:50,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:46:50,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 01:46:50,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:46:50,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 01:46:50,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-22 01:46:50,491 INFO L87 Difference]: Start difference. First operand 333 states and 398 transitions. Second operand has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:46:52,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:46:52,542 INFO L93 Difference]: Finished difference Result 374 states and 445 transitions. [2022-11-22 01:46:52,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-22 01:46:52,542 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-11-22 01:46:52,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:46:52,544 INFO L225 Difference]: With dead ends: 374 [2022-11-22 01:46:52,544 INFO L226 Difference]: Without dead ends: 370 [2022-11-22 01:46:52,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-11-22 01:46:52,546 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 360 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 1171 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 1209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:46:52,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 183 Invalid, 1209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1171 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-22 01:46:52,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-11-22 01:46:52,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 347. [2022-11-22 01:46:52,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 303 states have (on average 1.2046204620462047) internal successors, (365), 318 states have internal predecessors, (365), 33 states have call successors, (33), 13 states have call predecessors, (33), 10 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-22 01:46:52,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 413 transitions. [2022-11-22 01:46:52,655 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 413 transitions. Word has length 36 [2022-11-22 01:46:52,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:46:52,655 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 413 transitions. [2022-11-22 01:46:52,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:46:52,656 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 413 transitions. [2022-11-22 01:46:52,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-22 01:46:52,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:46:52,657 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:46:52,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-22 01:46:52,657 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:46:52,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:46:52,657 INFO L85 PathProgramCache]: Analyzing trace with hash 501463376, now seen corresponding path program 1 times [2022-11-22 01:46:52,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:46:52,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988712077] [2022-11-22 01:46:52,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:46:52,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:46:52,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:46:55,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:46:55,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:46:55,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988712077] [2022-11-22 01:46:55,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988712077] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:46:55,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848499156] [2022-11-22 01:46:55,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:46:55,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:46:55,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6988fca8-53e1-4784-b448-7d346a585ec6/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:46:55,158 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6988fca8-53e1-4784-b448-7d346a585ec6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:46:55,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6988fca8-53e1-4784-b448-7d346a585ec6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 01:46:55,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:46:55,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 181 conjunts are in the unsatisfiable core [2022-11-22 01:46:55,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:46:55,516 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:46:55,516 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 16 treesize of output 22 [2022-11-22 01:46:55,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 01:46:55,551 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:46:55,552 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 27 [2022-11-22 01:46:55,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:46:55,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-22 01:46:55,598 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:46:55,599 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 [2022-11-22 01:46:55,719 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 9 treesize of output 3 [2022-11-22 01:46:55,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:46:55,730 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 17 treesize of output 7 [2022-11-22 01:46:56,002 INFO L321 Elim1Store]: treesize reduction 73, result has 3.9 percent of original size [2022-11-22 01:46:56,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 122 treesize of output 126 [2022-11-22 01:46:56,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:46:56,060 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2022-11-22 01:46:56,061 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 102 treesize of output 106 [2022-11-22 01:46:56,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:46:56,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 71 [2022-11-22 01:46:56,123 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-11-22 01:46:56,123 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 86 [2022-11-22 01:46:56,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:46:56,133 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 64 treesize of output 38 [2022-11-22 01:46:56,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:46:56,170 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:46:56,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 38 treesize of output 55 [2022-11-22 01:46:56,512 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-22 01:46:56,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 234 treesize of output 201 [2022-11-22 01:46:56,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:46:56,532 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 125 treesize of output 107 [2022-11-22 01:46:56,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:46:56,556 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-22 01:46:56,556 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 108 [2022-11-22 01:46:56,562 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 91 [2022-11-22 01:46:56,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:46:56,571 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 86 [2022-11-22 01:46:56,579 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 82 [2022-11-22 01:46:56,666 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 78 [2022-11-22 01:46:56,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 01:46:56,709 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 77 [2022-11-22 01:46:56,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 01:46:56,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:46:56,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:46:56,941 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 72 treesize of output 69 [2022-11-22 01:46:56,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:46:56,951 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 89 treesize of output 79 [2022-11-22 01:46:56,973 INFO L321 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2022-11-22 01:46:56,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-22 01:46:57,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:46:57,112 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 74 treesize of output 46 [2022-11-22 01:46:57,116 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 41 treesize of output 21 [2022-11-22 01:46:57,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:46:57,390 INFO L321 Elim1Store]: treesize reduction 54, result has 23.9 percent of original size [2022-11-22 01:46:57,391 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 4 new quantified variables, introduced 2 case distinctions, treesize of input 188 treesize of output 132 [2022-11-22 01:46:57,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:46:57,414 INFO L321 Elim1Store]: treesize reduction 42, result has 10.6 percent of original size [2022-11-22 01:46:57,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 162 treesize of output 143 [2022-11-22 01:46:57,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:46:57,421 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 0 case distinctions, treesize of input 132 treesize of output 112 [2022-11-22 01:46:57,444 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-22 01:46:57,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 80 [2022-11-22 01:46:57,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:46:57,453 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 80 treesize of output 76 [2022-11-22 01:46:57,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:46:57,461 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 50 treesize of output 50 [2022-11-22 01:46:57,924 INFO L321 Elim1Store]: treesize reduction 74, result has 30.2 percent of original size [2022-11-22 01:46:57,925 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 5 new quantified variables, introduced 9 case distinctions, treesize of input 230 treesize of output 234 [2022-11-22 01:46:58,000 INFO L321 Elim1Store]: treesize reduction 110, result has 25.7 percent of original size [2022-11-22 01:46:58,000 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 4 new quantified variables, introduced 9 case distinctions, treesize of input 226 treesize of output 229 [2022-11-22 01:47:03,815 INFO L321 Elim1Store]: treesize reduction 37, result has 54.3 percent of original size [2022-11-22 01:47:03,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 154 treesize of output 155 [2022-11-22 01:47:03,846 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-11-22 01:47:03,847 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 3 case distinctions, treesize of input 98 treesize of output 71 [2022-11-22 01:47:04,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-11-22 01:47:04,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-11-22 01:47:04,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-11-22 01:47:04,534 INFO L321 Elim1Store]: treesize reduction 45, result has 72.0 percent of original size [2022-11-22 01:47:04,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 165 treesize of output 232 [2022-11-22 01:47:08,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:47:08,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:47:09,476 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse5 (+ |c_~#gl_list~0.offset| 4))) (and (forall ((v_ArrVal_1623 (Array Int Int)) (v_ArrVal_1622 (Array Int Int))) (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_gl_insert_~node~1#1.base| v_ArrVal_1622))) (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_gl_insert_~node~1#1.base| v_ArrVal_1623)) (.cse3 (select (select .cse0 |c_~#gl_list~0.base|) .cse5))) (let ((.cse2 (+ 4 .cse3)) (.cse1 (select (select .cse4 |c_~#gl_list~0.base|) .cse5))) (or (not (= (select (select .cse0 .cse1) .cse2) .cse3)) (not (= (select (select .cse4 .cse1) .cse2) .cse1)) (= |c_~#gl_list~0.offset| .cse3)))))) (forall ((v_ArrVal_1623 (Array Int Int)) (v_ArrVal_1622 (Array Int Int))) (let ((.cse6 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_gl_insert_~node~1#1.base| v_ArrVal_1622))) (let ((.cse10 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_gl_insert_~node~1#1.base| v_ArrVal_1623)) (.cse9 (select (select .cse6 |c_~#gl_list~0.base|) .cse5))) (let ((.cse8 (+ 4 .cse9)) (.cse7 (select (select .cse10 |c_~#gl_list~0.base|) .cse5))) (or (not (= (select (select .cse6 .cse7) .cse8) .cse9)) (not (= (select (select .cse10 .cse7) .cse8) .cse7)) (= .cse7 |c_~#gl_list~0.base|)))))))) is different from false [2022-11-22 01:47:09,921 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse7 (select (select |c_#memory_$Pointer$.base| |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|))) (let ((.cse8 (select |c_#memory_$Pointer$.base| .cse7)) (.cse5 (+ |c_~#gl_list~0.offset| 4)) (.cse11 (select |c_#memory_$Pointer$.offset| .cse7)) (.cse12 (+ |c_ULTIMATE.start_gl_insert_~node~1#1.offset| 4))) (and (forall ((v_ArrVal_1656 (Array Int Int)) (v_ArrVal_1623 (Array Int Int)) (v_ArrVal_1655 (Array Int Int)) (v_ArrVal_1622 (Array Int Int)) (v_ArrVal_1654 (Array Int Int)) (v_ArrVal_1652 (Array Int Int)) (v_ArrVal_1653 Int) (v_ArrVal_1657 Int) (|v_list_add___list_add_~next#1.offset_16| Int)) (let ((.cse9 (+ |v_list_add___list_add_~next#1.offset_16| 4))) (let ((.cse4 (store (let ((.cse10 (store |c_#memory_$Pointer$.offset| .cse7 (store .cse11 .cse9 .cse12)))) (store (store .cse10 |c_ULTIMATE.start_gl_insert_~node~1#1.base| v_ArrVal_1654) |c_~#gl_list~0.base| (store (select (store .cse10 |c_ULTIMATE.start_gl_insert_~node~1#1.base| v_ArrVal_1655) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset| v_ArrVal_1653))) |c_ULTIMATE.start_gl_insert_~node~1#1.base| v_ArrVal_1622))) (let ((.cse1 (store (let ((.cse6 (store |c_#memory_$Pointer$.base| .cse7 (store .cse8 .cse9 |c_ULTIMATE.start_gl_insert_~node~1#1.base|)))) (store (store .cse6 |c_ULTIMATE.start_gl_insert_~node~1#1.base| v_ArrVal_1656) |c_~#gl_list~0.base| (store (select (store .cse6 |c_ULTIMATE.start_gl_insert_~node~1#1.base| v_ArrVal_1652) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset| v_ArrVal_1657))) |c_ULTIMATE.start_gl_insert_~node~1#1.base| v_ArrVal_1623)) (.cse3 (select (select .cse4 |c_~#gl_list~0.base|) .cse5))) (let ((.cse2 (+ .cse3 4)) (.cse0 (select (select .cse1 |c_~#gl_list~0.base|) .cse5))) (or (not (= .cse0 (select (select .cse1 .cse0) .cse2))) (not (= .cse3 (select (select .cse4 .cse0) .cse2))) (= .cse0 |c_~#gl_list~0.base|))))))) (forall ((v_ArrVal_1656 (Array Int Int)) (v_ArrVal_1623 (Array Int Int)) (v_ArrVal_1655 (Array Int Int)) (v_ArrVal_1622 (Array Int Int)) (v_ArrVal_1654 (Array Int Int)) (v_ArrVal_1652 (Array Int Int)) (v_ArrVal_1653 Int) (v_ArrVal_1657 Int) (|v_list_add___list_add_~next#1.offset_16| Int)) (let ((.cse19 (+ |v_list_add___list_add_~next#1.offset_16| 4))) (let ((.cse17 (store (let ((.cse20 (store |c_#memory_$Pointer$.offset| .cse7 (store .cse11 .cse19 .cse12)))) (store (store .cse20 |c_ULTIMATE.start_gl_insert_~node~1#1.base| v_ArrVal_1654) |c_~#gl_list~0.base| (store (select (store .cse20 |c_ULTIMATE.start_gl_insert_~node~1#1.base| v_ArrVal_1655) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset| v_ArrVal_1653))) |c_ULTIMATE.start_gl_insert_~node~1#1.base| v_ArrVal_1622))) (let ((.cse16 (select (select .cse17 |c_~#gl_list~0.base|) .cse5)) (.cse14 (store (let ((.cse18 (store |c_#memory_$Pointer$.base| .cse7 (store .cse8 .cse19 |c_ULTIMATE.start_gl_insert_~node~1#1.base|)))) (store (store .cse18 |c_ULTIMATE.start_gl_insert_~node~1#1.base| v_ArrVal_1656) |c_~#gl_list~0.base| (store (select (store .cse18 |c_ULTIMATE.start_gl_insert_~node~1#1.base| v_ArrVal_1652) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset| v_ArrVal_1657))) |c_ULTIMATE.start_gl_insert_~node~1#1.base| v_ArrVal_1623))) (let ((.cse13 (select (select .cse14 |c_~#gl_list~0.base|) .cse5)) (.cse15 (+ .cse16 4))) (or (not (= .cse13 (select (select .cse14 .cse13) .cse15))) (not (= .cse16 (select (select .cse17 .cse13) .cse15))) (= |c_~#gl_list~0.offset| .cse16)))))))))) is different from false [2022-11-22 01:47:09,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848499156] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:47:09,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1696430135] [2022-11-22 01:47:09,927 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2022-11-22 01:47:09,927 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:47:09,928 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:47:09,928 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:47:09,928 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:47:09,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:09,967 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-22 01:47:09,967 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 32 treesize of output 27 [2022-11-22 01:47:10,025 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 01:47:10,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-22 01:47:10,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-22 01:47:10,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-22 01:47:10,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:10,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 23 [2022-11-22 01:47:10,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:10,204 INFO L321 Elim1Store]: treesize reduction 128, result has 32.3 percent of original size [2022-11-22 01:47:10,205 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 3 case distinctions, treesize of input 85 treesize of output 71 [2022-11-22 01:47:10,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:10,310 INFO L321 Elim1Store]: treesize reduction 147, result has 22.2 percent of original size [2022-11-22 01:47:10,310 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 3 case distinctions, treesize of input 85 treesize of output 52 [2022-11-22 01:47:10,370 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-22 01:47:10,371 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 1 case distinctions, treesize of input 35 treesize of output 19 [2022-11-22 01:47:10,415 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-22 01:47:10,415 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 39 treesize of output 31 [2022-11-22 01:47:10,454 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-22 01:47:10,454 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 31 [2022-11-22 01:47:10,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:10,490 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 21 treesize of output 11 [2022-11-22 01:47:10,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 22 treesize of output 10 [2022-11-22 01:47:10,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:10,509 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 17 treesize of output 7 [2022-11-22 01:47:10,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 22 treesize of output 10 [2022-11-22 01:47:10,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:10,550 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 17 treesize of output 7 [2022-11-22 01:47:10,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:10,560 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 21 treesize of output 11 [2022-11-22 01:47:10,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 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 [2022-11-22 01:47:10,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 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 [2022-11-22 01:47:10,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 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 [2022-11-22 01:47:10,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:10,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-22 01:47:10,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:10,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-22 01:47:10,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:10,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:10,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:10,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:10,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-22 01:47:10,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:10,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:10,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:10,715 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:47:10,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 53 [2022-11-22 01:47:10,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:47:10,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 01:47:10,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 01:47:10,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 01:47:10,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 01:47:10,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 01:47:10,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 01:47:10,936 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 19 treesize of output 1 [2022-11-22 01:47:10,944 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 [2022-11-22 01:47:10,952 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 [2022-11-22 01:47:11,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:11,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:47:11,195 INFO L321 Elim1Store]: treesize reduction 72, result has 27.3 percent of original size [2022-11-22 01:47:11,196 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 4 case distinctions, treesize of input 236 treesize of output 240 [2022-11-22 01:47:11,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:11,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:47:11,272 INFO L321 Elim1Store]: treesize reduction 72, result has 27.3 percent of original size [2022-11-22 01:47:11,272 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 4 case distinctions, treesize of input 230 treesize of output 234 [2022-11-22 01:47:11,407 INFO L321 Elim1Store]: treesize reduction 96, result has 31.9 percent of original size [2022-11-22 01:47:11,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 220 treesize of output 248 [2022-11-22 01:47:11,462 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-11-22 01:47:11,462 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 4 new quantified variables, introduced 4 case distinctions, treesize of input 213 treesize of output 222 [2022-11-22 01:47:11,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 218 [2022-11-22 01:47:11,824 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-22 01:47:11,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 182 [2022-11-22 01:47:11,839 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-22 01:47:11,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 182 treesize of output 168 [2022-11-22 01:47:11,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 176 treesize of output 164 [2022-11-22 01:47:11,948 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-22 01:47:11,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 182 [2022-11-22 01:47:11,963 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-22 01:47:11,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 182 treesize of output 168 [2022-11-22 01:47:11,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 176 treesize of output 164 [2022-11-22 01:47:12,022 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 [2022-11-22 01:47:12,033 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 [2022-11-22 01:47:12,040 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 [2022-11-22 01:47:12,068 INFO L197 IcfgInterpreter]: Interpreting procedure list_add with input of size 29 for LOIs [2022-11-22 01:47:12,121 INFO L197 IcfgInterpreter]: Interpreting procedure inspect with input of size 63 for LOIs [2022-11-22 01:47:12,364 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 31 for LOIs [2022-11-22 01:47:12,369 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:47:22,370 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10179#(and (<= |~#gl_list~0.base| 3) (<= 0 |#NULL.base|) (<= 3 |~#gl_list~0.base|) (exists ((v_inspect_~head.base_BEFORE_CALL_4 Int) (v_inspect_~head.offset_BEFORE_CALL_4 Int)) (and (= v_inspect_~head.offset_BEFORE_CALL_4 (select (select |#memory_$Pointer$.offset| v_inspect_~head.base_BEFORE_CALL_4) (+ v_inspect_~head.offset_BEFORE_CALL_4 4))) (= (select (select |#memory_$Pointer$.base| v_inspect_~head.base_BEFORE_CALL_4) (+ v_inspect_~head.offset_BEFORE_CALL_4 4)) v_inspect_~head.base_BEFORE_CALL_4))) (<= |#NULL.offset| 0) (<= |#NULL.base| 0) (<= 0 |~#gl_list~0.offset|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |~#gl_list~0.offset| 0))' at error location [2022-11-22 01:47:22,370 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:47:22,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:47:22,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 32 [2022-11-22 01:47:22,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503794640] [2022-11-22 01:47:22,371 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:47:22,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-22 01:47:22,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:47:22,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-22 01:47:22,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=3457, Unknown=7, NotChecked=238, Total=3906 [2022-11-22 01:47:22,374 INFO L87 Difference]: Start difference. First operand 347 states and 413 transitions. Second operand has 33 states, 25 states have (on average 2.52) internal successors, (63), 23 states have internal predecessors, (63), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 01:47:28,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:47:30,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:47:32,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:47:35,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:47:40,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:47:42,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:47:44,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:47:46,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:47:48,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:47:49,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:47:51,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:47:54,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:47:56,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:47:58,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:48:00,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:48:02,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:48:12,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:48:14,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:48:15,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:48:15,355 INFO L93 Difference]: Finished difference Result 388 states and 454 transitions. [2022-11-22 01:48:15,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-22 01:48:15,356 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 25 states have (on average 2.52) internal successors, (63), 23 states have internal predecessors, (63), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 38 [2022-11-22 01:48:15,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:48:15,358 INFO L225 Difference]: With dead ends: 388 [2022-11-22 01:48:15,358 INFO L226 Difference]: Without dead ends: 385 [2022-11-22 01:48:15,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1333 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=387, Invalid=5768, Unknown=15, NotChecked=310, Total=6480 [2022-11-22 01:48:15,360 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 942 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 4429 mSolverCounterSat, 153 mSolverCounterUnsat, 74 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 942 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 4656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 4429 IncrementalHoareTripleChecker+Invalid, 74 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:48:15,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [942 Valid, 617 Invalid, 4656 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [153 Valid, 4429 Invalid, 74 Unknown, 0 Unchecked, 46.0s Time] [2022-11-22 01:48:15,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-11-22 01:48:15,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 347. [2022-11-22 01:48:15,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 303 states have (on average 1.2013201320132014) internal successors, (364), 318 states have internal predecessors, (364), 33 states have call successors, (33), 13 states have call predecessors, (33), 10 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-22 01:48:15,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 412 transitions. [2022-11-22 01:48:15,492 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 412 transitions. Word has length 38 [2022-11-22 01:48:15,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:48:15,492 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 412 transitions. [2022-11-22 01:48:15,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 25 states have (on average 2.52) internal successors, (63), 23 states have internal predecessors, (63), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 01:48:15,493 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 412 transitions. [2022-11-22 01:48:15,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-22 01:48:15,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:48:15,494 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:48:15,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6988fca8-53e1-4784-b448-7d346a585ec6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 01:48:15,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6988fca8-53e1-4784-b448-7d346a585ec6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-22 01:48:15,699 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:48:15,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:48:15,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1366794378, now seen corresponding path program 1 times [2022-11-22 01:48:15,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:48:15,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890727821] [2022-11-22 01:48:15,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:48:15,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:48:15,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-22 01:48:15,732 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-22 01:48:15,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-22 01:48:15,810 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-22 01:48:15,810 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-22 01:48:15,823 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location failErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-22 01:48:15,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-22 01:48:15,832 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:48:15,837 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-22 01:48:15,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:48:15 BoogieIcfgContainer [2022-11-22 01:48:15,899 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-22 01:48:15,900 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-22 01:48:15,900 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-22 01:48:15,900 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-22 01:48:15,901 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:40:52" (3/4) ... [2022-11-22 01:48:15,903 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-22 01:48:15,950 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6988fca8-53e1-4784-b448-7d346a585ec6/bin/utaipan-g80aRyZoba/witness.graphml [2022-11-22 01:48:15,950 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-22 01:48:15,955 INFO L158 Benchmark]: Toolchain (without parser) took 444578.26ms. Allocated memory was 186.6MB in the beginning and 564.1MB in the end (delta: 377.5MB). Free memory was 151.7MB in the beginning and 299.7MB in the end (delta: -148.0MB). Peak memory consumption was 230.9MB. Max. memory is 16.1GB. [2022-11-22 01:48:15,956 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 142.6MB. Free memory is still 82.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-22 01:48:15,957 INFO L158 Benchmark]: CACSL2BoogieTranslator took 673.18ms. Allocated memory is still 186.6MB. Free memory was 151.1MB in the beginning and 124.6MB in the end (delta: 26.5MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2022-11-22 01:48:15,959 INFO L158 Benchmark]: Boogie Procedure Inliner took 69.35ms. Allocated memory is still 186.6MB. Free memory was 124.6MB in the beginning and 122.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-22 01:48:15,959 INFO L158 Benchmark]: Boogie Preprocessor took 63.91ms. Allocated memory is still 186.6MB. Free memory was 122.5MB in the beginning and 119.8MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-22 01:48:15,959 INFO L158 Benchmark]: RCFGBuilder took 750.49ms. Allocated memory is still 186.6MB. Free memory was 119.8MB in the beginning and 90.2MB in the end (delta: 29.6MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2022-11-22 01:48:15,959 INFO L158 Benchmark]: TraceAbstraction took 442953.72ms. Allocated memory was 186.6MB in the beginning and 564.1MB in the end (delta: 377.5MB). Free memory was 89.6MB in the beginning and 302.8MB in the end (delta: -213.3MB). Peak memory consumption was 165.9MB. Max. memory is 16.1GB. [2022-11-22 01:48:15,960 INFO L158 Benchmark]: Witness Printer took 50.25ms. Allocated memory is still 564.1MB. Free memory was 302.8MB in the beginning and 299.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-22 01:48:15,961 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 142.6MB. Free memory is still 82.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 673.18ms. Allocated memory is still 186.6MB. Free memory was 151.1MB in the beginning and 124.6MB in the end (delta: 26.5MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 69.35ms. Allocated memory is still 186.6MB. Free memory was 124.6MB in the beginning and 122.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 63.91ms. Allocated memory is still 186.6MB. Free memory was 122.5MB in the beginning and 119.8MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 750.49ms. Allocated memory is still 186.6MB. Free memory was 119.8MB in the beginning and 90.2MB in the end (delta: 29.6MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * TraceAbstraction took 442953.72ms. Allocated memory was 186.6MB in the beginning and 564.1MB in the end (delta: 377.5MB). Free memory was 89.6MB in the beginning and 302.8MB in the end (delta: -213.3MB). Peak memory consumption was 165.9MB. Max. memory is 16.1GB. * Witness Printer took 50.25ms. Allocated memory is still 564.1MB. Free memory was 302.8MB in the beginning and 299.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 840]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L850] struct list_head gl_list = { &(gl_list), &(gl_list) }; [L949] CALL gl_read() [L909] CALL gl_insert(__VERIFIER_nondet_int()) [L899] struct node *node = malloc(sizeof *node); [L900] COND FALSE !(!node) [L902] node->value = value VAL [\old(value)=6, gl_list={3:0}, node={5:0}, value=6] [L903] CALL list_add(&node->linkage, &gl_list) VAL [gl_list={3:0}] [L890] EXPR head->next [L890] CALL __list_add(new, head, head->next) [L878] next->prev = new [L879] new->next = next [L880] new->prev = prev [L881] prev->next = new [L890] RET __list_add(new, head, head->next) [L903] RET list_add(&node->linkage, &gl_list) VAL [\old(value)=6, gl_list={3:0}, node={5:0}, value=6] [L904] (&node->nested)->next = (&node->nested) [L904] (&node->nested)->next = (&node->nested) VAL [\old(value)=6, gl_list={3:0}, node={5:0}, value=6] [L909] RET gl_insert(__VERIFIER_nondet_int()) [L911] COND FALSE !(__VERIFIER_nondet_int()) [L949] RET gl_read() [L950] CALL inspect(&gl_list) VAL [gl_list={3:0}, head={3:0}] [L853] COND FALSE !(!(head)) VAL [gl_list={3:0}, head={3:0}, head={3:0}] [L854] EXPR head->next VAL [gl_list={3:0}, head={3:0}, head={3:0}, head->next={5:4}] [L854] COND FALSE !(!(head->next != head)) [L855] EXPR head->prev VAL [gl_list={3:0}, head={3:0}, head={3:0}, head->prev={5:4}] [L855] COND FALSE !(!(head->prev != head)) [L856] EXPR head->prev [L856] head = head->prev [L857] COND FALSE !(!(head)) VAL [gl_list={3:0}, head={5:4}, head={3:0}] [L858] EXPR head->next VAL [gl_list={3:0}, head={5:4}, head={3:0}, head->next={3:0}] [L858] COND FALSE !(!(head->next != head)) [L859] EXPR head->prev VAL [gl_list={3:0}, head={3:0}, head={5:4}, head->prev={3:0}] [L859] COND FALSE !(!(head->prev != head)) [L860] const struct node *node = ((struct node *)((char *)(head)-(unsigned long)(&((struct node *)0)->linkage))); VAL [gl_list={3:0}, head={3:0}, head={5:4}, node={5:0}] [L861] COND FALSE !(!(node)) VAL [gl_list={3:0}, head={3:0}, head={5:4}, node={5:0}] [L862] EXPR node->nested.next VAL [gl_list={3:0}, head={5:4}, head={3:0}, node={5:0}, node->nested.next={5:12}] [L862] COND FALSE !(!(node->nested.next == &node->nested)) [L863] EXPR node->nested.prev VAL [gl_list={3:0}, head={3:0}, head={5:4}, node={5:0}, node->nested.prev={53:55}] [L863] COND TRUE !(node->nested.prev == &node->nested) [L863] CALL fail() VAL [gl_list={3:0}] [L840] reach_error() VAL [gl_list={3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 105 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 442.8s, OverallIterations: 14, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 114.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 496 mSolverCounterUnknown, 7769 SdHoareTripleChecker+Valid, 79.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7746 mSDsluCounter, 3807 SdHoareTripleChecker+Invalid, 76.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3246 mSDsCounter, 1285 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 21402 IncrementalHoareTripleChecker+Invalid, 23183 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1285 mSolverCounterUnsat, 561 mSDtfsCounter, 21402 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 643 GetRequests, 203 SyntacticMatches, 9 SemanticMatches, 431 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 5202 ImplicationChecksByTransitivity, 144.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=347occurred in iteration=12, InterpolantAutomatonStates: 205, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 13 MinimizatonAttempts, 499 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 285.4s InterpolantComputationTime, 519 NumberOfCodeBlocks, 519 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 463 ConstructedInterpolants, 61 QuantifiedInterpolants, 28588 SizeOfPredicates, 160 NumberOfNonLiveVariables, 1640 ConjunctsInSsa, 659 ConjunctsInUnsatCore, 17 InterpolantComputations, 9 PerfectInterpolantSequences, 4/64 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-22 01:48:16,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6988fca8-53e1-4784-b448-7d346a585ec6/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE