./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191cefc8-b4c8-41d6-8633-9504684f2b6e/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191cefc8-b4c8-41d6-8633-9504684f2b6e/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191cefc8-b4c8-41d6-8633-9504684f2b6e/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191cefc8-b4c8-41d6-8633-9504684f2b6e/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191cefc8-b4c8-41d6-8633-9504684f2b6e/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191cefc8-b4c8-41d6-8633-9504684f2b6e/bin/utaipan-gh47qXpMRh --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 f8d14145608efc0a8f321a178564faff63399ecbab28641c0c2971fec318068f --- 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-2329fc7 [2022-12-14 08:12:03,423 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:12:03,424 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:12:03,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:12:03,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:12:03,438 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:12:03,439 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:12:03,440 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:12:03,441 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:12:03,441 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:12:03,442 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:12:03,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:12:03,443 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:12:03,444 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:12:03,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:12:03,445 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:12:03,446 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:12:03,447 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:12:03,448 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:12:03,449 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:12:03,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:12:03,451 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:12:03,451 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:12:03,452 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:12:03,454 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:12:03,454 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:12:03,455 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:12:03,455 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:12:03,456 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:12:03,456 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:12:03,457 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:12:03,457 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:12:03,458 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:12:03,458 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:12:03,459 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:12:03,459 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:12:03,459 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:12:03,460 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:12:03,460 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:12:03,460 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:12:03,461 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:12:03,462 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191cefc8-b4c8-41d6-8633-9504684f2b6e/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 08:12:03,475 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:12:03,476 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:12:03,476 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:12:03,476 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:12:03,477 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:12:03,477 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:12:03,477 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:12:03,477 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:12:03,477 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:12:03,477 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:12:03,478 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:12:03,478 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:12:03,478 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:12:03,478 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:12:03,478 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:12:03,478 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:12:03,478 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:12:03,479 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:12:03,479 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:12:03,479 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:12:03,479 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:12:03,480 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:12:03,480 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:12:03,480 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 08:12:03,480 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:12:03,480 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 08:12:03,480 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:12:03,480 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 08:12:03,481 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:12:03,481 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 08:12:03,481 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:12:03,481 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:12:03,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:12:03,481 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:12:03,482 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:12:03,482 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:12:03,482 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 08:12:03,482 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:12:03,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:12:03,482 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 08:12:03,483 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:12:03,483 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_191cefc8-b4c8-41d6-8633-9504684f2b6e/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191cefc8-b4c8-41d6-8633-9504684f2b6e/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f8d14145608efc0a8f321a178564faff63399ecbab28641c0c2971fec318068f [2022-12-14 08:12:03,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:12:03,674 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:12:03,676 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:12:03,677 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:12:03,677 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:12:03,678 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191cefc8-b4c8-41d6-8633-9504684f2b6e/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2022-12-14 08:12:06,250 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:12:06,446 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:12:06,447 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191cefc8-b4c8-41d6-8633-9504684f2b6e/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2022-12-14 08:12:06,454 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191cefc8-b4c8-41d6-8633-9504684f2b6e/bin/utaipan-gh47qXpMRh/data/84fe42826/667fb023e4574e468dd8682760f17d74/FLAGf270b4efd [2022-12-14 08:12:06,828 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191cefc8-b4c8-41d6-8633-9504684f2b6e/bin/utaipan-gh47qXpMRh/data/84fe42826/667fb023e4574e468dd8682760f17d74 [2022-12-14 08:12:06,832 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:12:06,835 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:12:06,837 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:12:06,838 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:12:06,844 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:12:06,845 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:12:06" (1/1) ... [2022-12-14 08:12:06,847 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5079cd09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:12:06, skipping insertion in model container [2022-12-14 08:12:06,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:12:06" (1/1) ... [2022-12-14 08:12:06,860 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:12:06,896 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:12:07,058 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_191cefc8-b4c8-41d6-8633-9504684f2b6e/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i[22636,22649] [2022-12-14 08:12:07,079 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:12:07,087 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:12:07,110 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_191cefc8-b4c8-41d6-8633-9504684f2b6e/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i[22636,22649] [2022-12-14 08:12:07,120 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:12:07,137 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:12:07,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:12:07 WrapperNode [2022-12-14 08:12:07,138 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:12:07,138 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:12:07,138 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:12:07,139 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:12:07,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:12:07" (1/1) ... [2022-12-14 08:12:07,154 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:12:07" (1/1) ... [2022-12-14 08:12:07,170 INFO L138 Inliner]: procedures = 129, calls = 79, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 200 [2022-12-14 08:12:07,170 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:12:07,171 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:12:07,171 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:12:07,171 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:12:07,178 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:12:07" (1/1) ... [2022-12-14 08:12:07,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:12:07" (1/1) ... [2022-12-14 08:12:07,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:12:07" (1/1) ... [2022-12-14 08:12:07,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:12:07" (1/1) ... [2022-12-14 08:12:07,187 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:12:07" (1/1) ... [2022-12-14 08:12:07,191 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:12:07" (1/1) ... [2022-12-14 08:12:07,192 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:12:07" (1/1) ... [2022-12-14 08:12:07,193 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:12:07" (1/1) ... [2022-12-14 08:12:07,196 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:12:07,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:12:07,196 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:12:07,196 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:12:07,197 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:12:07" (1/1) ... [2022-12-14 08:12:07,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:12:07,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191cefc8-b4c8-41d6-8633-9504684f2b6e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:12:07,217 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191cefc8-b4c8-41d6-8633-9504684f2b6e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:12:07,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191cefc8-b4c8-41d6-8633-9504684f2b6e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:12:07,247 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2022-12-14 08:12:07,247 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2022-12-14 08:12:07,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 08:12:07,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:12:07,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 08:12:07,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 08:12:07,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 08:12:07,248 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2022-12-14 08:12:07,248 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2022-12-14 08:12:07,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 08:12:07,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 08:12:07,248 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2022-12-14 08:12:07,248 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2022-12-14 08:12:07,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 08:12:07,248 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2022-12-14 08:12:07,248 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2022-12-14 08:12:07,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:12:07,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:12:07,338 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:12:07,339 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:12:07,576 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:12:07,616 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:12:07,616 INFO L300 CfgBuilder]: Removed 33 assume(true) statements. [2022-12-14 08:12:07,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:12:07 BoogieIcfgContainer [2022-12-14 08:12:07,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:12:07,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:12:07,619 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:12:07,622 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:12:07,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:12:06" (1/3) ... [2022-12-14 08:12:07,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd7a006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:12:07, skipping insertion in model container [2022-12-14 08:12:07,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:12:07" (2/3) ... [2022-12-14 08:12:07,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd7a006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:12:07, skipping insertion in model container [2022-12-14 08:12:07,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:12:07" (3/3) ... [2022-12-14 08:12:07,624 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2022-12-14 08:12:07,637 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:12:07,638 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 08:12:07,673 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:12:07,677 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;@cf54e57, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:12:07,677 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 08:12:07,681 INFO L276 IsEmpty]: Start isEmpty. Operand has 78 states, 57 states have (on average 1.7017543859649122) internal successors, (97), 65 states have internal predecessors, (97), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-12-14 08:12:07,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 08:12:07,686 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:12:07,686 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:12:07,687 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:12:07,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:12:07,690 INFO L85 PathProgramCache]: Analyzing trace with hash -560390858, now seen corresponding path program 1 times [2022-12-14 08:12:07,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:12:07,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000889190] [2022-12-14 08:12:07,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:12:07,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:12:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:12:07,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:12:07,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:12:07,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000889190] [2022-12-14 08:12:07,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000889190] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:12:07,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:12:07,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:12:07,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512549228] [2022-12-14 08:12:07,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:12:07,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 08:12:07,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:12:07,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 08:12:07,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 08:12:07,846 INFO L87 Difference]: Start difference. First operand has 78 states, 57 states have (on average 1.7017543859649122) internal successors, (97), 65 states have internal predecessors, (97), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-12-14 08:12:07,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:12:07,900 INFO L93 Difference]: Finished difference Result 151 states and 261 transitions. [2022-12-14 08:12:07,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 08:12:07,902 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 13 [2022-12-14 08:12:07,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:12:07,907 INFO L225 Difference]: With dead ends: 151 [2022-12-14 08:12:07,907 INFO L226 Difference]: Without dead ends: 74 [2022-12-14 08:12:07,909 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 [2022-12-14 08:12:07,912 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:12:07,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 86 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:12:07,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-12-14 08:12:07,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-12-14 08:12:07,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 62 states have internal predecessors, (69), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 08:12:07,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 94 transitions. [2022-12-14 08:12:07,941 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 94 transitions. Word has length 13 [2022-12-14 08:12:07,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:12:07,942 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 94 transitions. [2022-12-14 08:12:07,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-12-14 08:12:07,942 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 94 transitions. [2022-12-14 08:12:07,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 08:12:07,943 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:12:07,943 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:12:07,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 08:12:07,943 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:12:07,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:12:07,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1369228015, now seen corresponding path program 1 times [2022-12-14 08:12:07,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:12:07,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145798694] [2022-12-14 08:12:07,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:12:07,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:12:08,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:12:09,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:12:09,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:12:09,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145798694] [2022-12-14 08:12:09,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145798694] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:12:09,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119180344] [2022-12-14 08:12:09,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:12:09,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:12:09,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191cefc8-b4c8-41d6-8633-9504684f2b6e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:12:09,409 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191cefc8-b4c8-41d6-8633-9504684f2b6e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:12:09,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191cefc8-b4c8-41d6-8633-9504684f2b6e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 08:12:09,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:12:09,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 96 conjunts are in the unsatisfiable core [2022-12-14 08:12:09,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:12:09,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-14 08:12:09,700 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-12-14 08:12:09,701 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-12-14 08:12:09,710 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 8 treesize of output 7 [2022-12-14 08:12:09,719 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 12 treesize of output 11 [2022-12-14 08:12:09,748 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 66 treesize of output 19 [2022-12-14 08:12:09,752 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 [2022-12-14 08:12:09,926 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 15 treesize of output 17 [2022-12-14 08:12:10,023 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 24 treesize of output 19 [2022-12-14 08:12:10,085 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 20 treesize of output 8 [2022-12-14 08:12:10,099 WARN L859 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int) (v_ArrVal_311 (Array Int Int)) (v_ArrVal_312 (Array Int Int))) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.base| (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_311) |c_chain_node_#in~ppnode#1.base| v_ArrVal_312)))) is different from true [2022-12-14 08:12:10,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:10,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:10,120 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 29 treesize of output 29 [2022-12-14 08:12:10,123 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 [2022-12-14 08:12:10,157 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 [2022-12-14 08:12:10,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-12-14 08:12:10,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:12:10,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119180344] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:12:10,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [637524290] [2022-12-14 08:12:10,326 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-12-14 08:12:10,326 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:12:10,330 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:12:10,335 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:12:10,335 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:12:10,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:10,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:10,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:10,416 INFO L321 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-12-14 08:12:10,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 42 [2022-12-14 08:12:10,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:10,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:10,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:10,492 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-12-14 08:12:10,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-12-14 08:12:10,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 08:12:10,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 08:12:10,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:10,592 INFO L321 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2022-12-14 08:12:10,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 35 [2022-12-14 08:12:10,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:10,654 INFO L321 Elim1Store]: treesize reduction 72, result has 48.9 percent of original size [2022-12-14 08:12:10,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 382 treesize of output 186 [2022-12-14 08:12:10,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:10,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:10,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 23 [2022-12-14 08:12:10,686 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 23 treesize of output 17 [2022-12-14 08:12:10,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:10,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:10,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 23 [2022-12-14 08:12:10,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-12-14 08:12:10,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:10,828 INFO L321 Elim1Store]: treesize reduction 100, result has 29.1 percent of original size [2022-12-14 08:12:10,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 382 treesize of output 158 [2022-12-14 08:12:10,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:10,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:10,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 13 [2022-12-14 08:12:10,853 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 [2022-12-14 08:12:10,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:10,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:10,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 13 [2022-12-14 08:12:10,874 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-12-14 08:12:10,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:10,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:10,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:10,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-12-14 08:12:10,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:10,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:10,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:10,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-12-14 08:12:10,990 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 [2022-12-14 08:12:10,997 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 [2022-12-14 08:12:11,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:11,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:11,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:11,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-12-14 08:12:11,104 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 [2022-12-14 08:12:11,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:11,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:11,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:11,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-12-14 08:12:11,125 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 [2022-12-14 08:12:11,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:11,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:11,386 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 08:12:11,386 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 524 treesize of output 401 [2022-12-14 08:12:11,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:11,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:11,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:11,433 INFO L321 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2022-12-14 08:12:11,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 489 treesize of output 478 [2022-12-14 08:12:11,461 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 56 [2022-12-14 08:12:11,471 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 40 treesize of output 36 [2022-12-14 08:12:11,485 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 57 treesize of output 53 [2022-12-14 08:12:11,496 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 56 [2022-12-14 08:12:11,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 08:12:11,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 08:12:11,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:11,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:11,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:11,646 INFO L321 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2022-12-14 08:12:11,646 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 5 case distinctions, treesize of input 354 treesize of output 294 [2022-12-14 08:12:11,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:11,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:11,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:11,689 INFO L321 Elim1Store]: treesize reduction 92, result has 22.0 percent of original size [2022-12-14 08:12:11,689 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 8 case distinctions, treesize of input 354 treesize of output 342 [2022-12-14 08:12:12,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:12,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:12,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:12,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:12,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:12,200 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 08:12:12,200 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 350 treesize of output 269 [2022-12-14 08:12:12,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:12,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:12,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:12,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:12,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:12,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:12,222 INFO L321 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2022-12-14 08:12:12,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 282 treesize of output 246 [2022-12-14 08:12:12,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-12-14 08:12:12,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-12-14 08:12:12,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:12,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:12,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:12,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:12,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:12,816 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 08:12:12,816 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 350 treesize of output 269 [2022-12-14 08:12:12,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:12,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:12,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:12,841 INFO L321 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2022-12-14 08:12:12,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 282 treesize of output 246 [2022-12-14 08:12:12,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-12-14 08:12:12,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-12-14 08:12:13,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 16 treesize of output 18 [2022-12-14 08:12:13,524 INFO L197 IcfgInterpreter]: Interpreting procedure chain_node with input of size 12 for LOIs [2022-12-14 08:12:13,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 08:12:13,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:13,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:13,556 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 08:12:13,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 21 [2022-12-14 08:12:13,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 08:12:13,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:13,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:13,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:13,585 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 08:12:13,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 176 treesize of output 100 [2022-12-14 08:12:13,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:13,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:13,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 13 [2022-12-14 08:12:13,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:13,606 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 [2022-12-14 08:12:13,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:13,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:13,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:13,650 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2022-12-14 08:12:13,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 176 treesize of output 104 [2022-12-14 08:12:13,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:13,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:13,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 13 [2022-12-14 08:12:13,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:13,671 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 [2022-12-14 08:12:13,689 INFO L197 IcfgInterpreter]: Interpreting procedure check_seq_next with input of size 111 for LOIs [2022-12-14 08:12:13,791 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 90 for LOIs [2022-12-14 08:12:13,809 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:12:17,850 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '545#(and (= |#NULL.offset| 0) (exists ((|v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_create_sll_~#list~0#1.base_21| Int) (v_DerPreprocessor_9 (Array Int Int)) (v_DerPreprocessor_8 (Array Int Int)) (v_DerPreprocessor_11 (Array Int Int)) (v_DerPreprocessor_12 (Array Int Int))) (and (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_6|) 0) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) 0) (= (select |#valid| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) (select v_DerPreprocessor_9 0)) (= (select (select (store (store (store (store |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) v_DerPreprocessor_11) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_DerPreprocessor_12) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) v_DerPreprocessor_11) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_DerPreprocessor_12) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0)) 0) 0) (= v_DerPreprocessor_11 (select (store (store (store (store |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) v_DerPreprocessor_11) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_DerPreprocessor_12) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) v_DerPreprocessor_11) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_DerPreprocessor_12) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0))) (= (select (store (store (store (store |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) v_DerPreprocessor_8) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_DerPreprocessor_9) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) v_DerPreprocessor_8) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_DerPreprocessor_9) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0)) v_DerPreprocessor_8) (not (= 2 |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|)) (= (select (select (store (store (store (store |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) v_DerPreprocessor_8) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_DerPreprocessor_9) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) v_DerPreprocessor_8) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_DerPreprocessor_9) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0)) 4) 0) (not (= 2 |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_6|)) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_6|)) (= (select (select (store (store (store (store |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) v_DerPreprocessor_8) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_DerPreprocessor_9) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) v_DerPreprocessor_8) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_DerPreprocessor_9) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0)) 0) 0) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0)) 4) 0) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_6| 0)) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_6|) 0) 0) (= (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0)) 8) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0)) 4) 0) (<= 0 |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) 0)) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| 0)) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0)) 1) (= (select v_DerPreprocessor_12 0) 0) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_6|) (= (select (select (store (store (store (store |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) v_DerPreprocessor_11) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_DerPreprocessor_12) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) v_DerPreprocessor_11) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_DerPreprocessor_12) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0)) 4) 0) (< (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_6|))) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:12:17,850 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:12:17,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 08:12:17,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2022-12-14 08:12:17,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269865681] [2022-12-14 08:12:17,851 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 08:12:17,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 08:12:17,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:12:17,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 08:12:17,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1030, Unknown=26, NotChecked=66, Total=1260 [2022-12-14 08:12:17,853 INFO L87 Difference]: Start difference. First operand 74 states and 94 transitions. Second operand has 19 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 16 states have internal predecessors, (28), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 08:12:18,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:12:18,907 INFO L93 Difference]: Finished difference Result 110 states and 141 transitions. [2022-12-14 08:12:18,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 08:12:18,908 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 16 states have internal predecessors, (28), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 22 [2022-12-14 08:12:18,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:12:18,910 INFO L225 Difference]: With dead ends: 110 [2022-12-14 08:12:18,910 INFO L226 Difference]: Without dead ends: 107 [2022-12-14 08:12:18,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=224, Invalid=1645, Unknown=27, NotChecked=84, Total=1980 [2022-12-14 08:12:18,911 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 165 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 08:12:18,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 284 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 907 Invalid, 0 Unknown, 133 Unchecked, 0.6s Time] [2022-12-14 08:12:18,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-12-14 08:12:18,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2022-12-14 08:12:18,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 72 states have internal predecessors, (82), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 08:12:18,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 107 transitions. [2022-12-14 08:12:18,925 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 107 transitions. Word has length 22 [2022-12-14 08:12:18,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:12:18,926 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 107 transitions. [2022-12-14 08:12:18,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 16 states have internal predecessors, (28), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 08:12:18,926 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 107 transitions. [2022-12-14 08:12:18,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 08:12:18,927 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:12:18,927 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:12:18,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191cefc8-b4c8-41d6-8633-9504684f2b6e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 08:12:19,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191cefc8-b4c8-41d6-8633-9504684f2b6e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-14 08:12:19,129 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:12:19,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:12:19,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1560985145, now seen corresponding path program 1 times [2022-12-14 08:12:19,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:12:19,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226642127] [2022-12-14 08:12:19,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:12:19,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:12:19,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:12:19,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:12:19,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:12:19,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226642127] [2022-12-14 08:12:19,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226642127] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:12:19,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065702623] [2022-12-14 08:12:19,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:12:19,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:12:19,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191cefc8-b4c8-41d6-8633-9504684f2b6e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:12:19,932 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191cefc8-b4c8-41d6-8633-9504684f2b6e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:12:19,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191cefc8-b4c8-41d6-8633-9504684f2b6e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 08:12:20,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:12:20,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 88 conjunts are in the unsatisfiable core [2022-12-14 08:12:20,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:12:20,076 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 [2022-12-14 08:12:20,109 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-12-14 08:12:20,109 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-12-14 08:12:20,113 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 8 treesize of output 7 [2022-12-14 08:12:20,118 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 12 treesize of output 11 [2022-12-14 08:12:20,140 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2022-12-14 08:12:20,140 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 34 [2022-12-14 08:12:20,142 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 [2022-12-14 08:12:20,211 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 08:12:20,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-12-14 08:12:20,267 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-12-14 08:12:20,267 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 2 case distinctions, treesize of input 26 treesize of output 33 [2022-12-14 08:12:20,275 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 [2022-12-14 08:12:20,299 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 8 treesize of output 4 [2022-12-14 08:12:20,312 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_639 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_640 (Array Int Int))) (and (= |c_#memory_$Pointer$.base| (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_639) |c_chain_node_#in~ppnode#1.base| (store (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_640) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| |chain_node_~node~0#1.base|))) (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (not (= |chain_node_~node~0#1.base| 0)))) is different from true [2022-12-14 08:12:20,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:20,356 INFO L321 Elim1Store]: treesize reduction 61, result has 37.1 percent of original size [2022-12-14 08:12:20,357 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 5 case distinctions, treesize of input 45 treesize of output 97 [2022-12-14 08:12:20,364 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 8 treesize of output 7 [2022-12-14 08:12:20,383 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 12 treesize of output 11 [2022-12-14 08:12:20,394 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 36 treesize of output 36 [2022-12-14 08:12:20,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:20,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:20,418 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 76 treesize of output 36 [2022-12-14 08:12:20,421 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 08:12:20,425 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 [2022-12-14 08:12:20,643 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:12:20,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 107 treesize of output 139 [2022-12-14 08:12:20,690 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 27 treesize of output 19 [2022-12-14 08:12:20,732 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 [2022-12-14 08:12:20,765 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 12 treesize of output 8 [2022-12-14 08:12:20,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-12-14 08:12:20,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:12:20,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065702623] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:12:20,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [195892173] [2022-12-14 08:12:20,905 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 08:12:20,905 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:12:20,905 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:12:20,905 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:12:20,906 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:12:20,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:20,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:20,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:20,963 INFO L321 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-12-14 08:12:20,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 42 [2022-12-14 08:12:20,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:20,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:20,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:21,031 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-12-14 08:12:21,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-12-14 08:12:21,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 08:12:21,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:21,124 INFO L321 Elim1Store]: treesize reduction 100, result has 29.1 percent of original size [2022-12-14 08:12:21,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 382 treesize of output 158 [2022-12-14 08:12:21,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:21,172 INFO L321 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2022-12-14 08:12:21,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 26 [2022-12-14 08:12:21,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:21,179 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 [2022-12-14 08:12:21,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:21,195 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:12:21,195 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 24 treesize of output 34 [2022-12-14 08:12:21,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:21,251 INFO L321 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2022-12-14 08:12:21,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 35 [2022-12-14 08:12:21,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 08:12:21,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:21,314 INFO L321 Elim1Store]: treesize reduction 72, result has 48.9 percent of original size [2022-12-14 08:12:21,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 386 treesize of output 190 [2022-12-14 08:12:21,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:21,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:21,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 23 [2022-12-14 08:12:21,332 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-12-14 08:12:21,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:21,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:21,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 23 [2022-12-14 08:12:21,349 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 23 treesize of output 17 [2022-12-14 08:12:21,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:21,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:21,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:21,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-12-14 08:12:21,425 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 [2022-12-14 08:12:21,432 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 [2022-12-14 08:12:21,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:21,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:21,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:21,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-12-14 08:12:21,516 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 [2022-12-14 08:12:21,524 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 [2022-12-14 08:12:21,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:21,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:21,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:21,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-12-14 08:12:21,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:21,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:21,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:21,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-12-14 08:12:21,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:21,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:21,771 INFO L321 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2022-12-14 08:12:21,772 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 4 case distinctions, treesize of input 477 treesize of output 425 [2022-12-14 08:12:21,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:21,795 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 425 treesize of output 397 [2022-12-14 08:12:21,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:21,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:21,818 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-12-14 08:12:21,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 413 treesize of output 410 [2022-12-14 08:12:21,837 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 57 treesize of output 53 [2022-12-14 08:12:21,843 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 56 [2022-12-14 08:12:21,863 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 08:12:21,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 08:12:21,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:21,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:21,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:21,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:21,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:21,920 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:12:21,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 66 [2022-12-14 08:12:21,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:21,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:21,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:21,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:21,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:21,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 42 [2022-12-14 08:12:21,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 08:12:22,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:22,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:22,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:22,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:22,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:22,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2022-12-14 08:12:22,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:22,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:22,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:22,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:22,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:22,046 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:12:22,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 34 [2022-12-14 08:12:22,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-12-14 08:12:22,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-12-14 08:12:22,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:22,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:22,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:22,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:22,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:22,149 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:12:22,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 41 [2022-12-14 08:12:22,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:22,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:22,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:22,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:22,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:22,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2022-12-14 08:12:22,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-12-14 08:12:22,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-12-14 08:12:22,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 16 treesize of output 18 [2022-12-14 08:12:22,409 INFO L197 IcfgInterpreter]: Interpreting procedure chain_node with input of size 153 for LOIs [2022-12-14 08:12:22,649 INFO L197 IcfgInterpreter]: Interpreting procedure check_seq_next with input of size 97 for LOIs [2022-12-14 08:12:22,783 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 106 for LOIs [2022-12-14 08:12:22,833 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:12:29,559 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1011#(and (= |#NULL.offset| 0) (or (exists ((|v_ULTIMATE.start_create_sll_#in~pp2#1.base_BEFORE_CALL_12| Int)) (and (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_#in~pp2#1.base_BEFORE_CALL_12|) (not (= 2 |v_ULTIMATE.start_create_sll_#in~pp2#1.base_BEFORE_CALL_12|)) (<= 0 |v_ULTIMATE.start_create_sll_#in~pp2#1.base_BEFORE_CALL_12|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_#in~pp2#1.base_BEFORE_CALL_12|) 0) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_#in~pp2#1.base_BEFORE_CALL_12|) 0) 0) (exists ((|v_ULTIMATE.start_create_sll_~#list~0#1.base_24| Int) (v_DerPreprocessor_37 (Array Int Int)) (v_DerPreprocessor_38 (Array Int Int))) (and (= (select |#valid| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) (< (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 4) 0) (exists ((|v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| Int)) (and (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| 0)) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|)) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| |v_ULTIMATE.start_create_sll_#in~pp2#1.base_BEFORE_CALL_12|)) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14|) 0) 0)) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| 2)) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14|) (<= 0 |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14|))) (= (select (select (store (store (store (store |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_DerPreprocessor_37) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_38) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_DerPreprocessor_37) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_38) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 0) 0) (= (select v_DerPreprocessor_38 0) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) 0)) (= (select (store (store (store (store |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_DerPreprocessor_37) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_38) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_DerPreprocessor_37) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_38) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) v_DerPreprocessor_37) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 4) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) 0) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| 0)) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| |v_ULTIMATE.start_create_sll_#in~pp2#1.base_BEFORE_CALL_12|)) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0))) (<= 0 |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) (= (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 8) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 1) (not (= 2 |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|)) (= (select (select (store (store (store (store |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_DerPreprocessor_37) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_38) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_DerPreprocessor_37) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_38) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 4) 0))) (not (= |v_ULTIMATE.start_create_sll_#in~pp2#1.base_BEFORE_CALL_12| 0)))) (exists ((|v_ULTIMATE.start_create_sll_#in~pp2#1.base_BEFORE_CALL_12| Int)) (and (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_#in~pp2#1.base_BEFORE_CALL_12|) (not (= 2 |v_ULTIMATE.start_create_sll_#in~pp2#1.base_BEFORE_CALL_12|)) (exists ((|v_ULTIMATE.start_create_sll_~#list~0#1.base_24| Int) (v_DerPreprocessor_37 (Array Int Int)) (v_DerPreprocessor_38 (Array Int Int))) (and (= (select |#valid| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) (< (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 4) 0) (= (select (select (store (store (store (store |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_DerPreprocessor_37) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_38) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_DerPreprocessor_37) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_38) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 0) 0) (= (select v_DerPreprocessor_38 0) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) 0)) (= (select (store (store (store (store |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_DerPreprocessor_37) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_38) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_DerPreprocessor_37) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_38) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) v_DerPreprocessor_37) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 4) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) 0) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| 0)) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| |v_ULTIMATE.start_create_sll_#in~pp2#1.base_BEFORE_CALL_12|)) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0))) (<= 0 |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) (= (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 8) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 1) (not (= 2 |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|)) (= (select (select (store (store (store (store |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_DerPreprocessor_37) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_38) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_DerPreprocessor_37) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_38) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 4) 0) (exists ((|v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| Int)) (and (not (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14|) 0) 0)) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| 0)) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|)) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| |v_ULTIMATE.start_create_sll_#in~pp2#1.base_BEFORE_CALL_12|)) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| 2)) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14|) (<= 0 |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14|))))) (<= 0 |v_ULTIMATE.start_create_sll_#in~pp2#1.base_BEFORE_CALL_12|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_#in~pp2#1.base_BEFORE_CALL_12|) 0) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_#in~pp2#1.base_BEFORE_CALL_12|) 0) 0) (not (= |v_ULTIMATE.start_create_sll_#in~pp2#1.base_BEFORE_CALL_12| 0))))) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:12:29,559 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:12:29,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 08:12:29,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2022-12-14 08:12:29,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146099802] [2022-12-14 08:12:29,560 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 08:12:29,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 08:12:29,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:12:29,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 08:12:29,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1098, Unknown=22, NotChecked=68, Total=1332 [2022-12-14 08:12:29,561 INFO L87 Difference]: Start difference. First operand 85 states and 107 transitions. Second operand has 19 states, 11 states have (on average 2.727272727272727) internal successors, (30), 16 states have internal predecessors, (30), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 08:12:30,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:12:30,693 INFO L93 Difference]: Finished difference Result 97 states and 123 transitions. [2022-12-14 08:12:30,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 08:12:30,693 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 11 states have (on average 2.727272727272727) internal successors, (30), 16 states have internal predecessors, (30), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 24 [2022-12-14 08:12:30,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:12:30,694 INFO L225 Difference]: With dead ends: 97 [2022-12-14 08:12:30,694 INFO L226 Difference]: Without dead ends: 94 [2022-12-14 08:12:30,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=246, Invalid=1803, Unknown=25, NotChecked=88, Total=2162 [2022-12-14 08:12:30,695 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 162 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 81 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 08:12:30,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 364 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 793 Invalid, 5 Unknown, 112 Unchecked, 0.6s Time] [2022-12-14 08:12:30,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-12-14 08:12:30,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2022-12-14 08:12:30,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 72 states have internal predecessors, (81), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 08:12:30,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 106 transitions. [2022-12-14 08:12:30,703 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 106 transitions. Word has length 24 [2022-12-14 08:12:30,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:12:30,703 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 106 transitions. [2022-12-14 08:12:30,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 11 states have (on average 2.727272727272727) internal successors, (30), 16 states have internal predecessors, (30), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 08:12:30,703 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 106 transitions. [2022-12-14 08:12:30,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 08:12:30,704 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:12:30,704 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:12:30,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191cefc8-b4c8-41d6-8633-9504684f2b6e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 08:12:30,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191cefc8-b4c8-41d6-8633-9504684f2b6e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:12:30,905 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:12:30,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:12:30,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1084118683, now seen corresponding path program 1 times [2022-12-14 08:12:30,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:12:30,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509725224] [2022-12-14 08:12:30,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:12:30,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:12:30,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 08:12:30,959 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 08:12:30,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 08:12:30,997 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 08:12:30,998 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 08:12:30,998 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location failErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 08:12:31,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 08:12:31,002 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-12-14 08:12:31,005 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 08:12:31,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 08:12:31 BoogieIcfgContainer [2022-12-14 08:12:31,024 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 08:12:31,024 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 08:12:31,024 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 08:12:31,024 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 08:12:31,025 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:12:07" (3/4) ... [2022-12-14 08:12:31,026 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-14 08:12:31,052 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191cefc8-b4c8-41d6-8633-9504684f2b6e/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 08:12:31,052 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 08:12:31,053 INFO L158 Benchmark]: Toolchain (without parser) took 24218.52ms. Allocated memory was 151.0MB in the beginning and 318.8MB in the end (delta: 167.8MB). Free memory was 114.6MB in the beginning and 95.8MB in the end (delta: 18.8MB). Peak memory consumption was 189.6MB. Max. memory is 16.1GB. [2022-12-14 08:12:31,053 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 119.5MB. Free memory is still 94.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 08:12:31,053 INFO L158 Benchmark]: CACSL2BoogieTranslator took 300.53ms. Allocated memory is still 151.0MB. Free memory was 114.5MB in the beginning and 96.3MB in the end (delta: 18.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-12-14 08:12:31,053 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.77ms. Allocated memory is still 151.0MB. Free memory was 96.3MB in the beginning and 94.1MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 08:12:31,053 INFO L158 Benchmark]: Boogie Preprocessor took 25.18ms. Allocated memory is still 151.0MB. Free memory was 94.1MB in the beginning and 91.7MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 08:12:31,053 INFO L158 Benchmark]: RCFGBuilder took 421.70ms. Allocated memory is still 151.0MB. Free memory was 91.7MB in the beginning and 111.2MB in the end (delta: -19.5MB). Peak memory consumption was 29.8MB. Max. memory is 16.1GB. [2022-12-14 08:12:31,054 INFO L158 Benchmark]: TraceAbstraction took 23404.43ms. Allocated memory was 151.0MB in the beginning and 318.8MB in the end (delta: 167.8MB). Free memory was 110.5MB in the beginning and 99.0MB in the end (delta: 11.5MB). Peak memory consumption was 178.6MB. Max. memory is 16.1GB. [2022-12-14 08:12:31,054 INFO L158 Benchmark]: Witness Printer took 28.33ms. Allocated memory is still 318.8MB. Free memory was 99.0MB in the beginning and 95.8MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-12-14 08:12:31,055 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 119.5MB. Free memory is still 94.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 300.53ms. Allocated memory is still 151.0MB. Free memory was 114.5MB in the beginning and 96.3MB in the end (delta: 18.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.77ms. Allocated memory is still 151.0MB. Free memory was 96.3MB in the beginning and 94.1MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.18ms. Allocated memory is still 151.0MB. Free memory was 94.1MB in the beginning and 91.7MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 421.70ms. Allocated memory is still 151.0MB. Free memory was 91.7MB in the beginning and 111.2MB in the end (delta: -19.5MB). Peak memory consumption was 29.8MB. Max. memory is 16.1GB. * TraceAbstraction took 23404.43ms. Allocated memory was 151.0MB in the beginning and 318.8MB in the end (delta: 167.8MB). Free memory was 110.5MB in the beginning and 99.0MB in the end (delta: 11.5MB). Peak memory consumption was 178.6MB. Max. memory is 16.1GB. * Witness Printer took 28.33ms. Allocated memory is still 318.8MB. Free memory was 99.0MB in the beginning and 95.8MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. 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: 565]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L639] const struct node *p1, *p2; [L640] CALL, EXPR create_sll(&p1, &p2) [L588] struct node *list = ((void *)0); VAL [list={7:0}, pp1={5:0}, pp1={5:0}, pp2={6:0}, pp2={6:0}] [L590] CALL chain_node(&list) [L582] CALL, EXPR alloc_node() [L573] struct node *ptr = malloc(sizeof *ptr); [L574] COND FALSE !(!ptr) [L576] ptr->next = ((void *)0) [L577] ptr->prev = ((void *)0) [L578] return ptr; [L582] RET, EXPR alloc_node() [L582] struct node *node = alloc_node(); [L583] EXPR \read(**ppnode) [L583] node->next = *ppnode [L584] *ppnode = node [L590] RET chain_node(&list) VAL [list={7:0}, pp1={5:0}, pp1={5:0}, pp2={6:0}, pp2={6:0}] [L591] COND FALSE !(__VERIFIER_nondet_int()) [L592] EXPR \read(*list) [L592] *pp2 = list [L593] COND FALSE !(__VERIFIER_nondet_int()) [L595] EXPR \read(*list) [L595] *pp1 = list [L597] CALL chain_node(&list) [L582] CALL, EXPR alloc_node() [L573] struct node *ptr = malloc(sizeof *ptr); [L574] COND FALSE !(!ptr) [L576] ptr->next = ((void *)0) [L577] ptr->prev = ((void *)0) [L578] return ptr; [L582] RET, EXPR alloc_node() [L582] struct node *node = alloc_node(); [L583] EXPR \read(**ppnode) [L583] node->next = *ppnode [L584] *ppnode = node [L597] RET chain_node(&list) VAL [list={7:0}, pp1={5:0}, pp1={5:0}, pp2={6:0}, pp2={6:0}] [L598] COND FALSE !(__VERIFIER_nondet_int()) [L599] EXPR \read(*list) [L599] return list; [L588] struct node *list = ((void *)0); [L599] return list; [L640] RET, EXPR create_sll(&p1, &p2) [L640] struct node *list = create_sll(&p1, &p2); [L642] EXPR \read(*p1) [L642] EXPR \read(*p2) VAL [\read(*p1)={-1:0}, \read(*p2)={-1:0}, list={3:0}, p1={5:0}, p2={6:0}] [L642] CALL check_seq_next(p1, p2) VAL [beg={-1:0}, end={-1:0}] [L626] COND FALSE !(!(beg)) VAL [beg={-1:0}, beg={-1:0}, end={-1:0}, end={-1:0}] [L627] COND FALSE !(!(end)) VAL [beg={-1:0}, beg={-1:0}, end={-1:0}, end={-1:0}] [L628] EXPR beg->next [L628] beg = beg->next [L628] COND TRUE end != beg VAL [beg={-1:0}, beg={0:0}, end={-1:0}, end={-1:0}] [L629] COND TRUE !(beg) VAL [beg={-1:0}, beg={0:0}, end={-1:0}, end={-1:0}] [L629] CALL fail() [L565] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 78 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 23.3s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 5 mSolverCounterUnknown, 331 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 327 mSDsluCounter, 734 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 245 IncrementalHoareTripleChecker+Unchecked, 563 mSDsCounter, 154 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1712 IncrementalHoareTripleChecker+Invalid, 2116 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 154 mSolverCounterUnsat, 171 mSDtfsCounter, 1712 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 161 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 12.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=85occurred in iteration=2, InterpolantAutomatonStates: 30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 31 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.7s InterpolantComputationTime, 133 NumberOfCodeBlocks, 133 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 100 ConstructedInterpolants, 6 QuantifiedInterpolants, 2183 SizeOfPredicates, 50 NumberOfNonLiveVariables, 866 ConjunctsInSsa, 184 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 4/8 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! [2022-12-14 08:12:31,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191cefc8-b4c8-41d6-8633-9504684f2b6e/bin/utaipan-gh47qXpMRh/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