./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 6b4ec56b 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_3e5ec122-e7bc-4d27-b7c9-a0de3b0047d5/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e5ec122-e7bc-4d27-b7c9-a0de3b0047d5/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e5ec122-e7bc-4d27-b7c9-a0de3b0047d5/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e5ec122-e7bc-4d27-b7c9-a0de3b0047d5/bin/utaipan-6cKwYrpEi9/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_3e5ec122-e7bc-4d27-b7c9-a0de3b0047d5/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e5ec122-e7bc-4d27-b7c9-a0de3b0047d5/bin/utaipan-6cKwYrpEi9 --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-6b4ec56 [2022-11-20 20:01:19,815 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:01:19,817 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:01:19,857 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:01:19,858 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:01:19,861 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:01:19,864 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:01:19,867 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:01:19,869 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:01:19,875 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:01:19,876 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:01:19,879 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:01:19,879 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:01:19,881 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:01:19,884 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:01:19,885 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:01:19,887 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:01:19,888 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:01:19,889 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:01:19,896 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:01:19,897 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:01:19,899 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:01:19,901 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:01:19,902 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:01:19,912 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:01:19,912 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:01:19,913 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:01:19,915 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:01:19,915 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:01:19,918 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:01:19,918 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:01:19,919 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:01:19,921 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:01:19,923 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:01:19,924 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:01:19,924 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:01:19,925 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:01:19,925 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:01:19,925 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:01:19,927 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:01:19,928 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:01:19,929 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e5ec122-e7bc-4d27-b7c9-a0de3b0047d5/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 20:01:19,970 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:01:19,970 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:01:19,971 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:01:19,971 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:01:19,972 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:01:19,972 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:01:19,973 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:01:19,973 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:01:19,973 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:01:19,973 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 20:01:19,975 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:01:19,975 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:01:19,975 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 20:01:19,975 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 20:01:19,976 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:01:19,976 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 20:01:19,976 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 20:01:19,977 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 20:01:19,977 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:01:19,978 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:01:19,978 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:01:19,978 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:01:19,978 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:01:19,979 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:01:19,979 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:01:19,979 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:01:19,980 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:01:19,980 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:01:19,980 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:01:19,980 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:01:19,981 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:01:19,981 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:01:19,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:01:19,982 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:01:19,982 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 20:01:19,982 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:01:19,983 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:01:19,983 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 20:01:19,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 20:01:19,983 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:01:19,984 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:01:19,985 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_3e5ec122-e7bc-4d27-b7c9-a0de3b0047d5/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e5ec122-e7bc-4d27-b7c9-a0de3b0047d5/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f8d14145608efc0a8f321a178564faff63399ecbab28641c0c2971fec318068f [2022-11-20 20:01:20,259 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:01:20,284 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:01:20,288 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:01:20,290 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:01:20,290 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:01:20,292 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e5ec122-e7bc-4d27-b7c9-a0de3b0047d5/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2022-11-20 20:01:23,556 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:01:23,860 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:01:23,875 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e5ec122-e7bc-4d27-b7c9-a0de3b0047d5/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2022-11-20 20:01:23,892 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e5ec122-e7bc-4d27-b7c9-a0de3b0047d5/bin/utaipan-6cKwYrpEi9/data/760c4fdd5/4079777da7424a29b7b64765a01ae5f7/FLAGb7d3514bc [2022-11-20 20:01:23,909 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e5ec122-e7bc-4d27-b7c9-a0de3b0047d5/bin/utaipan-6cKwYrpEi9/data/760c4fdd5/4079777da7424a29b7b64765a01ae5f7 [2022-11-20 20:01:23,912 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:01:23,914 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:01:23,916 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:01:23,916 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:01:23,924 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:01:23,925 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:01:23" (1/1) ... [2022-11-20 20:01:23,927 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b978bb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:23, skipping insertion in model container [2022-11-20 20:01:23,928 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:01:23" (1/1) ... [2022-11-20 20:01:23,937 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:01:24,014 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:01:24,315 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_3e5ec122-e7bc-4d27-b7c9-a0de3b0047d5/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i[22636,22649] [2022-11-20 20:01:24,347 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:01:24,360 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:01:24,427 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_3e5ec122-e7bc-4d27-b7c9-a0de3b0047d5/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i[22636,22649] [2022-11-20 20:01:24,467 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:01:24,507 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:01:24,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:24 WrapperNode [2022-11-20 20:01:24,508 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:01:24,509 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:01:24,510 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:01:24,510 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:01:24,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:24" (1/1) ... [2022-11-20 20:01:24,535 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:24" (1/1) ... [2022-11-20 20:01:24,568 INFO L138 Inliner]: procedures = 129, calls = 79, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 200 [2022-11-20 20:01:24,568 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:01:24,569 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:01:24,569 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:01:24,569 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:01:24,581 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:24" (1/1) ... [2022-11-20 20:01:24,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:24" (1/1) ... [2022-11-20 20:01:24,587 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:24" (1/1) ... [2022-11-20 20:01:24,587 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:24" (1/1) ... [2022-11-20 20:01:24,601 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:24" (1/1) ... [2022-11-20 20:01:24,610 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:24" (1/1) ... [2022-11-20 20:01:24,612 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:24" (1/1) ... [2022-11-20 20:01:24,614 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:24" (1/1) ... [2022-11-20 20:01:24,619 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:01:24,620 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:01:24,620 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:01:24,620 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:01:24,621 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:24" (1/1) ... [2022-11-20 20:01:24,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:01:24,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e5ec122-e7bc-4d27-b7c9-a0de3b0047d5/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:01:24,675 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e5ec122-e7bc-4d27-b7c9-a0de3b0047d5/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:01:24,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e5ec122-e7bc-4d27-b7c9-a0de3b0047d5/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:01:24,731 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2022-11-20 20:01:24,731 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2022-11-20 20:01:24,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 20:01:24,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 20:01:24,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 20:01:24,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 20:01:24,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 20:01:24,733 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2022-11-20 20:01:24,733 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2022-11-20 20:01:24,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 20:01:24,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-20 20:01:24,733 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2022-11-20 20:01:24,734 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2022-11-20 20:01:24,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 20:01:24,734 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2022-11-20 20:01:24,734 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2022-11-20 20:01:24,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:01:24,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:01:24,902 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:01:24,905 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:01:25,412 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:01:25,508 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:01:25,508 INFO L300 CfgBuilder]: Removed 33 assume(true) statements. [2022-11-20 20:01:25,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:01:25 BoogieIcfgContainer [2022-11-20 20:01:25,511 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:01:25,513 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:01:25,514 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:01:25,518 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:01:25,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:01:23" (1/3) ... [2022-11-20 20:01:25,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32779773 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:01:25, skipping insertion in model container [2022-11-20 20:01:25,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:24" (2/3) ... [2022-11-20 20:01:25,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32779773 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:01:25, skipping insertion in model container [2022-11-20 20:01:25,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:01:25" (3/3) ... [2022-11-20 20:01:25,522 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2022-11-20 20:01:25,546 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:01:25,546 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 20:01:25,607 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:01:25,616 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;@172623fa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:01:25,616 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 20:01:25,621 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) [2022-11-20 20:01:25,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:01:25,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:01:25,633 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:01:25,634 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:01:25,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:01:25,641 INFO L85 PathProgramCache]: Analyzing trace with hash -996344974, now seen corresponding path program 1 times [2022-11-20 20:01:25,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:01:25,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409225974] [2022-11-20 20:01:25,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:25,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:01:25,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:25,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:01:25,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:01:25,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409225974] [2022-11-20 20:01:25,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409225974] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:01:25,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:01:25,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:01:25,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136639887] [2022-11-20 20:01:25,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:01:25,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 20:01:25,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:01:25,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 20:01:25,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 20:01:25,991 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) [2022-11-20 20:01:26,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:01:26,072 INFO L93 Difference]: Finished difference Result 151 states and 261 transitions. [2022-11-20 20:01:26,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 20:01:26,076 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 [2022-11-20 20:01:26,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:01:26,086 INFO L225 Difference]: With dead ends: 151 [2022-11-20 20:01:26,086 INFO L226 Difference]: Without dead ends: 74 [2022-11-20 20:01:26,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 20:01:26,095 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 [2022-11-20 20:01:26,097 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] [2022-11-20 20:01:26,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-20 20:01:26,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-11-20 20:01:26,145 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) [2022-11-20 20:01:26,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 94 transitions. [2022-11-20 20:01:26,150 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 94 transitions. Word has length 13 [2022-11-20 20:01:26,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:01:26,150 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 94 transitions. [2022-11-20 20:01:26,151 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) [2022-11-20 20:01:26,151 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 94 transitions. [2022-11-20 20:01:26,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 20:01:26,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:01:26,153 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] [2022-11-20 20:01:26,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 20:01:26,154 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:01:26,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:01:26,155 INFO L85 PathProgramCache]: Analyzing trace with hash -811379383, now seen corresponding path program 1 times [2022-11-20 20:01:26,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:01:26,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516130959] [2022-11-20 20:01:26,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:26,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:01:26,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:29,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:01:29,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:01:29,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516130959] [2022-11-20 20:01:29,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516130959] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:01:29,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375080875] [2022-11-20 20:01:29,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:29,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:01:29,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e5ec122-e7bc-4d27-b7c9-a0de3b0047d5/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:01:29,265 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e5ec122-e7bc-4d27-b7c9-a0de3b0047d5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:01:29,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e5ec122-e7bc-4d27-b7c9-a0de3b0047d5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 20:01:29,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:29,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-20 20:01:29,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:01:29,694 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-20 20:01:29,700 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 [2022-11-20 20:01:29,713 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 [2022-11-20 20:01:29,737 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 [2022-11-20 20:01:29,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:29,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 9 [2022-11-20 20:01:29,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-20 20:01:29,879 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|))) (or (exists ((v_DerPreprocessor_3 (Array Int Int)) (v_DerPreprocessor_2 (Array Int Int))) (let ((.cse0 (select v_DerPreprocessor_3 |c_chain_node_#in~ppnode#1.offset|))) (and (= .cse0 .cse1) (not (= .cse0 0)) (not (= .cse0 |c_chain_node_#in~ppnode#1.base|)) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_2) |c_chain_node_#in~ppnode#1.base| v_DerPreprocessor_3) .cse0 v_DerPreprocessor_2) |c_chain_node_#in~ppnode#1.base| v_DerPreprocessor_3) .cse0) (select |c_#memory_$Pointer$.base| .cse0))))) (and (= .cse1 |c_chain_node_#in~ppnode#1.base|) (not (= .cse1 0))))) is different from true [2022-11-20 20:01:30,299 INFO L321 Elim1Store]: treesize reduction 48, result has 43.5 percent of original size [2022-11-20 20:01:30,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 77 treesize of output 94 [2022-11-20 20:01:30,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-20 20:01:30,373 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 16 treesize of output 12 [2022-11-20 20:01:30,533 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:01:30,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-11-20 20:01:30,623 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 20:01:30,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 8 [2022-11-20 20:01:30,654 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_309 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_310 (Array Int Int))) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (not (= |chain_node_~node~0#1.base| 0)) (= (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_309) |c_chain_node_#in~ppnode#1.base| (store (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_310) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$.base|))) is different from true [2022-11-20 20:01:30,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:30,769 INFO L321 Elim1Store]: treesize reduction 61, result has 37.1 percent of original size [2022-11-20 20:01:30,769 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 56 treesize of output 104 [2022-11-20 20:01:30,788 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 [2022-11-20 20:01:30,833 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 20 treesize of output 17 [2022-11-20 20:01:30,859 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 [2022-11-20 20:01:30,999 INFO L321 Elim1Store]: treesize reduction 73, result has 19.8 percent of original size [2022-11-20 20:01:31,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 64 [2022-11-20 20:01:31,019 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 29 treesize of output 21 [2022-11-20 20:01:31,095 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 [2022-11-20 20:01:31,512 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:01:31,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 81 [2022-11-20 20:01:31,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:31,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-20 20:01:31,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:01:31,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375080875] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:01:31,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [752074357] [2022-11-20 20:01:31,873 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-20 20:01:31,884 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:01:31,892 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:01:31,902 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:01:31,903 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:01:31,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:31,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:32,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:32,070 INFO L321 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-11-20 20:01:32,071 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 [2022-11-20 20:01:32,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:32,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:32,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:32,199 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-20 20:01:32,199 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 [2022-11-20 20:01:32,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:01:32,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:32,370 INFO L321 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2022-11-20 20:01:32,370 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 [2022-11-20 20:01:32,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-20 20:01:32,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:32,481 INFO L321 Elim1Store]: treesize reduction 72, result has 48.9 percent of original size [2022-11-20 20:01:32,481 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 [2022-11-20 20:01:32,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:32,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:32,511 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 [2022-11-20 20:01:32,522 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 [2022-11-20 20:01:32,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:32,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:32,553 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 [2022-11-20 20:01:32,563 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 [2022-11-20 20:01:32,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:32,733 INFO L321 Elim1Store]: treesize reduction 100, result has 29.1 percent of original size [2022-11-20 20:01:32,734 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 [2022-11-20 20:01:32,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:32,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:32,762 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 [2022-11-20 20:01:32,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-20 20:01:32,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:32,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:32,793 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 [2022-11-20 20:01:32,808 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 [2022-11-20 20:01:32,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:32,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:32,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:32,939 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 [2022-11-20 20:01:32,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:33,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:33,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:33,002 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 [2022-11-20 20:01:33,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:33,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:33,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:33,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:33,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:33,158 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 [2022-11-20 20:01:33,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:33,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:33,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:33,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:33,239 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 [2022-11-20 20:01:33,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:33,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 20:01:33,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:33,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:33,745 INFO L321 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2022-11-20 20:01:33,746 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 651 treesize of output 648 [2022-11-20 20:01:33,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:33,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:33,836 INFO L321 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2022-11-20 20:01:33,836 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 591 treesize of output 523 [2022-11-20 20:01:33,905 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 155 treesize of output 119 [2022-11-20 20:01:33,923 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 [2022-11-20 20:01:33,941 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 [2022-11-20 20:01:33,953 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 58 treesize of output 52 [2022-11-20 20:01:33,982 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:34,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,076 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 [2022-11-20 20:01:34,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,106 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:01:34,106 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 [2022-11-20 20:01:34,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 20:01:34,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,337 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 [2022-11-20 20:01:34,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,361 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:01:34,362 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 [2022-11-20 20:01:34,378 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 [2022-11-20 20:01:34,389 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 [2022-11-20 20:01:34,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,537 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 [2022-11-20 20:01:34,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,557 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:01:34,557 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 [2022-11-20 20:01:34,569 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 [2022-11-20 20:01:34,586 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 [2022-11-20 20:01:35,052 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-20 20:01:35,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 666 treesize of output 677 [2022-11-20 20:01:35,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:36,519 INFO L197 IcfgInterpreter]: Interpreting procedure chain_node with input of size 151 for LOIs [2022-11-20 20:01:36,876 INFO L197 IcfgInterpreter]: Interpreting procedure check_seq_next with input of size 164 for LOIs [2022-11-20 20:01:37,217 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 143 for LOIs [2022-11-20 20:01:37,294 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:01:50,538 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '546#(or (and (exists ((v_DerPreprocessor_10 (Array Int Int)) (|v_ULTIMATE.start_create_sll_~#list~0#1.base_21| Int) (v_DerPreprocessor_11 (Array Int Int)) (v_DerPreprocessor_13 (Array Int Int)) (|v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_5| Int) (v_DerPreprocessor_14 (Array Int Int))) (and (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_5|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) 0) (= (select |#valid| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) (not (= 2 |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|)) (= v_DerPreprocessor_13 (select (store (store (store (store |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) v_DerPreprocessor_13) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_DerPreprocessor_14) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) v_DerPreprocessor_13) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_DerPreprocessor_14) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0))) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_5|) 0) 0) (= (select (select (store (store (store (store |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) v_DerPreprocessor_13) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_DerPreprocessor_14) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) v_DerPreprocessor_13) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_DerPreprocessor_14) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0)) 0) 0) (= (select v_DerPreprocessor_14 0) 0) (= (select (select (store (store (store (store |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) v_DerPreprocessor_13) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_DerPreprocessor_14) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) v_DerPreprocessor_13) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_DerPreprocessor_14) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0)) 4) 0) (= (select (select (store (store (store (store |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) v_DerPreprocessor_10) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_DerPreprocessor_11) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) v_DerPreprocessor_10) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_DerPreprocessor_11) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0)) 0) 0) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0)) 4) 0) (not (= |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_5| 0)) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) (= (select (select (store (store (store (store |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) v_DerPreprocessor_10) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_DerPreprocessor_11) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) v_DerPreprocessor_10) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_DerPreprocessor_11) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0)) 4) 0) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|)) (= (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0)) 8) (<= 0 |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_5|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0)) 4) 0) (<= 0 |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) (not (= |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_5| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|)) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) 0)) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| 0)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_5|) 0) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) (select v_DerPreprocessor_11 0)) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0)) 1) (= v_DerPreprocessor_10 (select (store (store (store (store |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) v_DerPreprocessor_10) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_DerPreprocessor_11) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) v_DerPreprocessor_10) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_DerPreprocessor_11) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0))) (not (= |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_5| 2)) (< (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) |#StackHeapBarrier|))) (= |#NULL.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0)) (and (exists ((v_prenex_10 (Array Int Int)) (|v_ULTIMATE.start_create_sll_~#list~0#1.base_21| Int) (v_prenex_13 (Array Int Int)) (v_prenex_12 (Array Int Int)) (v_prenex_11 (Array Int Int)) (|v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_5| Int)) (and (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| (select v_prenex_11 0))) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_5|) (= (select (select |#memory_$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$.base| (select v_prenex_11 0)) 4) 0) (not (= 2 |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|)) (= (select (select (store (store (store (store |#memory_$Pointer$.base| (select v_prenex_11 0) v_prenex_10) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_prenex_11) (select v_prenex_11 0) v_prenex_10) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_prenex_11) (select v_prenex_11 0)) 4) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) (select v_prenex_11 0)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_5|) 0) 0) (= (select (select (store (store (store (store |#memory_$Pointer$.base| (select v_prenex_11 0) v_prenex_10) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_prenex_11) (select v_prenex_11 0) v_prenex_10) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_prenex_11) (select v_prenex_11 0)) 0) 0) (= v_prenex_12 (select (store (store (store (store |#memory_$Pointer$.offset| (select v_prenex_11 0) v_prenex_12) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_prenex_13) (select v_prenex_11 0) v_prenex_12) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_prenex_13) (select v_prenex_11 0))) (< (select v_prenex_11 0) |#StackHeapBarrier|) (= (select |#length| (select v_prenex_11 0)) 8) (not (= |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_5| 0)) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) (not (= (select v_prenex_11 0) 0)) (<= 0 |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_5|) (<= 0 |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) (not (= |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_5| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|)) (= (select (select |#memory_$Pointer$.offset| (select v_prenex_11 0)) 4) 0) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| 0)) (= (select v_prenex_13 0) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_5|) 0) 0) (= (select (select (store (store (store (store |#memory_$Pointer$.offset| (select v_prenex_11 0) v_prenex_12) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_prenex_13) (select v_prenex_11 0) v_prenex_12) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_prenex_13) (select v_prenex_11 0)) 0) 0) (= (select (select (store (store (store (store |#memory_$Pointer$.offset| (select v_prenex_11 0) v_prenex_12) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_prenex_13) (select v_prenex_11 0) v_prenex_12) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_prenex_13) (select v_prenex_11 0)) 4) 0) (= (select |#valid| (select v_prenex_11 0)) 1) (not (= |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_5| 2)) (= (select (store (store (store (store |#memory_$Pointer$.base| (select v_prenex_11 0) v_prenex_10) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_prenex_11) (select v_prenex_11 0) v_prenex_10) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_prenex_11) (select v_prenex_11 0)) v_prenex_10))) (= |#NULL.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0)))' at error location [2022-11-20 20:01:50,539 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:01:50,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:01:50,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2022-11-20 20:01:50,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978374590] [2022-11-20 20:01:50,541 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 20:01:50,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 20:01:50,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:01:50,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 20:01:50,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1036, Unknown=29, NotChecked=134, Total=1332 [2022-11-20 20:01:50,545 INFO L87 Difference]: Start difference. First operand 74 states and 94 transitions. Second operand has 20 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 17 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 20:01:51,084 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|))) (let ((.cse0 (not (= .cse2 0)))) (and .cse0 (or (exists ((v_DerPreprocessor_3 (Array Int Int)) (v_DerPreprocessor_2 (Array Int Int))) (let ((.cse1 (select v_DerPreprocessor_3 |c_chain_node_#in~ppnode#1.offset|))) (and (= .cse1 .cse2) (not (= .cse1 0)) (not (= .cse1 |c_chain_node_#in~ppnode#1.base|)) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse1 v_DerPreprocessor_2) |c_chain_node_#in~ppnode#1.base| v_DerPreprocessor_3) .cse1 v_DerPreprocessor_2) |c_chain_node_#in~ppnode#1.base| v_DerPreprocessor_3) .cse1) (select |c_#memory_$Pointer$.base| .cse1))))) (and (= .cse2 |c_chain_node_#in~ppnode#1.base|) .cse0))))) is different from true [2022-11-20 20:01:51,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:01:51,999 INFO L93 Difference]: Finished difference Result 110 states and 140 transitions. [2022-11-20 20:01:52,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 20:01:52,001 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 17 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 22 [2022-11-20 20:01:52,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:01:52,004 INFO L225 Difference]: With dead ends: 110 [2022-11-20 20:01:52,004 INFO L226 Difference]: Without dead ends: 107 [2022-11-20 20:01:52,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=184, Invalid=1512, Unknown=38, NotChecked=246, Total=1980 [2022-11-20 20:01:52,008 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 128 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 320 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 20:01:52,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 412 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 650 Invalid, 0 Unknown, 320 Unchecked, 0.8s Time] [2022-11-20 20:01:52,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-20 20:01:52,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 97. [2022-11-20 20:01:52,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 71 states have (on average 1.295774647887324) internal successors, (92), 81 states have internal predecessors, (92), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-20 20:01:52,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 123 transitions. [2022-11-20 20:01:52,027 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 123 transitions. Word has length 22 [2022-11-20 20:01:52,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:01:52,028 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 123 transitions. [2022-11-20 20:01:52,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 17 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 20:01:52,028 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 123 transitions. [2022-11-20 20:01:52,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 20:01:52,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:01:52,029 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:01:52,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e5ec122-e7bc-4d27-b7c9-a0de3b0047d5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 20:01:52,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e5ec122-e7bc-4d27-b7c9-a0de3b0047d5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-20 20:01:52,236 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:01:52,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:01:52,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1941316115, now seen corresponding path program 1 times [2022-11-20 20:01:52,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:01:52,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596102960] [2022-11-20 20:01:52,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:52,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:01:52,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:53,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:01:53,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:01:53,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596102960] [2022-11-20 20:01:53,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596102960] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:01:53,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653985377] [2022-11-20 20:01:53,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:53,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:01:53,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e5ec122-e7bc-4d27-b7c9-a0de3b0047d5/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:01:53,791 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e5ec122-e7bc-4d27-b7c9-a0de3b0047d5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:01:53,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e5ec122-e7bc-4d27-b7c9-a0de3b0047d5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 20:01:53,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:54,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-20 20:01:54,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:01:54,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 20:01:54,097 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-20 20:01:54,098 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 [2022-11-20 20:01:54,105 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 [2022-11-20 20:01:54,112 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 [2022-11-20 20:01:54,135 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 [2022-11-20 20:01:54,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-20 20:01:54,279 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:01:54,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-11-20 20:01:54,367 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-20 20:01:54,369 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 [2022-11-20 20:01:54,387 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 16 treesize of output 12 [2022-11-20 20:01:54,453 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 [2022-11-20 20:01:54,472 WARN L859 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int) (v_ArrVal_630 (Array Int Int)) (v_ArrVal_631 (Array Int Int))) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_630) |c_chain_node_#in~ppnode#1.base| (store (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_631) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$.base|) (not (= |chain_node_~node~0#1.base| 0)))) is different from true [2022-11-20 20:01:54,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:54,533 INFO L321 Elim1Store]: treesize reduction 61, result has 37.1 percent of original size [2022-11-20 20:01:54,534 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 [2022-11-20 20:01:54,545 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 [2022-11-20 20:01:54,567 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 [2022-11-20 20:01:54,584 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 [2022-11-20 20:01:54,702 INFO L321 Elim1Store]: treesize reduction 73, result has 19.8 percent of original size [2022-11-20 20:01:54,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 64 [2022-11-20 20:01:54,710 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 29 treesize of output 21 [2022-11-20 20:01:54,767 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 [2022-11-20 20:01:55,072 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:01:55,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 81 [2022-11-20 20:01:55,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:55,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-20 20:01:55,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:01:55,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653985377] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:01:55,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1425792451] [2022-11-20 20:01:55,352 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-20 20:01:55,352 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:01:55,353 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:01:55,353 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:01:55,353 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:01:55,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,462 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-20 20:01:55,462 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 [2022-11-20 20:01:55,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2022-11-20 20:01:55,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,591 INFO L321 Elim1Store]: treesize reduction 100, result has 29.1 percent of original size [2022-11-20 20:01:55,592 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 [2022-11-20 20:01:55,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:55,675 INFO L321 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2022-11-20 20:01:55,676 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 [2022-11-20 20:01:55,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-20 20:01:55,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,706 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:01:55,707 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 [2022-11-20 20:01:55,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,775 INFO L321 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2022-11-20 20:01:55,775 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 [2022-11-20 20:01:55,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:01:55,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,871 INFO L321 Elim1Store]: treesize reduction 72, result has 48.9 percent of original size [2022-11-20 20:01:55,871 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 [2022-11-20 20:01:55,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:55,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:55,895 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 [2022-11-20 20:01:55,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-11-20 20:01:55,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:55,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:55,924 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 [2022-11-20 20:01:55,933 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 [2022-11-20 20:01:56,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-20 20:01:56,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,083 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 [2022-11-20 20:01:56,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:56,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:56,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,131 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 [2022-11-20 20:01:56,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:56,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:56,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,257 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 [2022-11-20 20:01:56,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,271 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 [2022-11-20 20:01:56,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,434 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:01:56,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 164 treesize of output 113 [2022-11-20 20:01:56,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-11-20 20:01:56,469 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 [2022-11-20 20:01:56,480 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 [2022-11-20 20:01:56,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 20:01:56,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 20:01:56,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,579 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:01:56,580 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 [2022-11-20 20:01:56,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,599 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 41 treesize of output 42 [2022-11-20 20:01:56,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,750 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:01:56,751 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 [2022-11-20 20:01:56,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,771 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 33 treesize of output 13 [2022-11-20 20:01:56,784 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 [2022-11-20 20:01:56,793 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 [2022-11-20 20:01:56,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,974 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:01:56,975 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 [2022-11-20 20:01:56,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,995 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 33 treesize of output 13 [2022-11-20 20:01:57,007 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 [2022-11-20 20:01:57,019 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 [2022-11-20 20:01:57,370 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-20 20:01:57,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 492 treesize of output 503 [2022-11-20 20:01:57,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:58,502 INFO L197 IcfgInterpreter]: Interpreting procedure chain_node with input of size 153 for LOIs [2022-11-20 20:01:58,837 INFO L197 IcfgInterpreter]: Interpreting procedure check_seq_next with input of size 136 for LOIs [2022-11-20 20:01:59,472 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 140 for LOIs [2022-11-20 20:01:59,623 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:02:12,645 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1025#(or (and (= |#NULL.offset| 0) (exists ((|v_ULTIMATE.start_create_sll_~#list~0#1.base_24| Int) (v_DerPreprocessor_33 (Array Int Int)) (|v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| Int) (v_DerPreprocessor_34 (Array Int Int)) (|v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13| Int)) (and (= (select |#valid| (select v_DerPreprocessor_34 0)) 1) (not (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14|) 0) 0)) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13|)) (= (select |#valid| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) (= (select (select (store (store (store (store |#memory_$Pointer$.base| (select v_DerPreprocessor_34 0) v_DerPreprocessor_33) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_34) (select v_DerPreprocessor_34 0) v_DerPreprocessor_33) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_34) (select v_DerPreprocessor_34 0)) 0) 0) (= (select (store (store (store (store |#memory_$Pointer$.base| (select v_DerPreprocessor_34 0) v_DerPreprocessor_33) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_34) (select v_DerPreprocessor_34 0) v_DerPreprocessor_33) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_34) (select v_DerPreprocessor_34 0)) v_DerPreprocessor_33) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13|) 0) 0) (< (select v_DerPreprocessor_34 0) |#StackHeapBarrier|) (= 8 (select |#length| (select v_DerPreprocessor_34 0))) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13|) (= (select v_DerPreprocessor_34 0) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) 0) (= (select (select |#memory_$Pointer$.base| (select v_DerPreprocessor_34 0)) 4) 0) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| 0)) (<= 0 |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13|) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| 0)) (= (select (select (store (store (store (store |#memory_$Pointer$.base| (select v_DerPreprocessor_34 0) v_DerPreprocessor_33) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_34) (select v_DerPreprocessor_34 0) v_DerPreprocessor_33) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_34) (select v_DerPreprocessor_34 0)) 4) 0) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|)) (not (= |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13| 0)) (not (= |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13| 2)) (<= 0 |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| (select v_DerPreprocessor_34 0))) (not (= |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|)) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| 2)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13|) 0) 0) (not (= 2 |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|)) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14|) (<= 0 |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14|) (= (select (select |#memory_$Pointer$.offset| (select v_DerPreprocessor_34 0)) 4) 0) (not (= (select v_DerPreprocessor_34 0) 0)))) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0)) (and (exists ((|v_ULTIMATE.start_create_sll_~#list~0#1.base_24| Int) (v_prenex_23 (Array Int Int)) (v_prenex_22 (Array Int Int)) (|v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| Int) (|v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13| Int)) (and (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13|)) (= (select |#valid| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) (< (select (select |#memory_$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$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_prenex_22) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_prenex_23) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_prenex_22) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_prenex_23) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 4) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13|) 0) 0) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13|) (= (select v_prenex_23 0) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) 0)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 4) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) 0) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| 0)) (<= 0 |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13|) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| 0)) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|)) (not (= |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13| 0)) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0))) (not (= |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13| 2)) (<= 0 |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) (= (select (select (store (store (store (store |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_prenex_22) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_prenex_23) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_prenex_22) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_prenex_23) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 0) 0) (= (select (store (store (store (store |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_prenex_22) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_prenex_23) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_prenex_22) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_prenex_23) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) v_prenex_22) (not (= |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|)) (= (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 8) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14|) 0) 0)) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| 2)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13|) 0) 0) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 1) (not (= 2 |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|)) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14|) (<= 0 |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14|))) (= |#NULL.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0)) (and (exists ((|v_ULTIMATE.start_create_sll_~#list~0#1.base_24| Int) (v_DerPreprocessor_33 (Array Int Int)) (|v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| Int) (v_DerPreprocessor_34 (Array Int Int)) (|v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13| Int)) (and (= (select |#valid| (select v_DerPreprocessor_34 0)) 1) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13|)) (= (select |#valid| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) (= (select (select (store (store (store (store |#memory_$Pointer$.base| (select v_DerPreprocessor_34 0) v_DerPreprocessor_33) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_34) (select v_DerPreprocessor_34 0) v_DerPreprocessor_33) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_34) (select v_DerPreprocessor_34 0)) 0) 0) (= (select (store (store (store (store |#memory_$Pointer$.base| (select v_DerPreprocessor_34 0) v_DerPreprocessor_33) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_34) (select v_DerPreprocessor_34 0) v_DerPreprocessor_33) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_34) (select v_DerPreprocessor_34 0)) v_DerPreprocessor_33) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13|) 0) 0) (< (select v_DerPreprocessor_34 0) |#StackHeapBarrier|) (= 8 (select |#length| (select v_DerPreprocessor_34 0))) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13|) (= (select v_DerPreprocessor_34 0) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) 0) (= (select (select |#memory_$Pointer$.base| (select v_DerPreprocessor_34 0)) 4) 0) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| 0)) (<= 0 |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13|) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| 0)) (= (select (select (store (store (store (store |#memory_$Pointer$.base| (select v_DerPreprocessor_34 0) v_DerPreprocessor_33) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_34) (select v_DerPreprocessor_34 0) v_DerPreprocessor_33) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_34) (select v_DerPreprocessor_34 0)) 4) 0) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|)) (not (= |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13| 0)) (not (= |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13| 2)) (<= 0 |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| (select v_DerPreprocessor_34 0))) (not (= |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|)) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14|) 0) 0)) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| 2)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13|) 0) 0) (not (= 2 |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|)) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14|) (<= 0 |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14|) (= (select (select |#memory_$Pointer$.offset| (select v_DerPreprocessor_34 0)) 4) 0) (not (= (select v_DerPreprocessor_34 0) 0)))) (= |#NULL.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0)) (and (exists ((|v_ULTIMATE.start_create_sll_~#list~0#1.base_24| Int) (v_prenex_23 (Array Int Int)) (v_prenex_22 (Array Int Int)) (|v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| Int) (|v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13| Int)) (and (not (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14|) 0) 0)) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13|)) (= (select |#valid| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) (< (select (select |#memory_$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$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_prenex_22) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_prenex_23) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_prenex_22) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_prenex_23) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 4) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13|) 0) 0) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13|) (= (select v_prenex_23 0) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) 0)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 4) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) 0) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| 0)) (<= 0 |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13|) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| 0)) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|)) (not (= |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13| 0)) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0))) (not (= |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13| 2)) (<= 0 |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) (= (select (select (store (store (store (store |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_prenex_22) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_prenex_23) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_prenex_22) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_prenex_23) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 0) 0) (= (select (store (store (store (store |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_prenex_22) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_prenex_23) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_prenex_22) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_prenex_23) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) v_prenex_22) (not (= |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|)) (= (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 8) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| 2)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13|) 0) 0) (= (select |#valid| (select (select |#memory_$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|)) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14|) (<= 0 |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14|))) (= |#NULL.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0)))' at error location [2022-11-20 20:02:12,645 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:02:12,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:02:12,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2022-11-20 20:02:12,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380235476] [2022-11-20 20:02:12,646 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 20:02:12,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 20:02:12,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:02:12,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 20:02:12,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1099, Unknown=12, NotChecked=68, Total=1332 [2022-11-20 20:02:12,648 INFO L87 Difference]: Start difference. First operand 97 states and 123 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) [2022-11-20 20:02:13,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:02:13,838 INFO L93 Difference]: Finished difference Result 108 states and 134 transitions. [2022-11-20 20:02:13,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 20:02:13,839 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 [2022-11-20 20:02:13,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:02:13,841 INFO L225 Difference]: With dead ends: 108 [2022-11-20 20:02:13,841 INFO L226 Difference]: Without dead ends: 105 [2022-11-20 20:02:13,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=218, Invalid=1580, Unknown=12, NotChecked=82, Total=1892 [2022-11-20 20:02:13,843 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 133 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 20:02:13,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 354 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 605 Invalid, 0 Unknown, 132 Unchecked, 0.7s Time] [2022-11-20 20:02:13,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-20 20:02:13,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2022-11-20 20:02:13,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 72 states have (on average 1.2777777777777777) internal successors, (92), 83 states have internal predecessors, (92), 21 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-20 20:02:13,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 125 transitions. [2022-11-20 20:02:13,862 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 125 transitions. Word has length 24 [2022-11-20 20:02:13,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:02:13,863 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 125 transitions. [2022-11-20 20:02:13,863 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) [2022-11-20 20:02:13,863 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 125 transitions. [2022-11-20 20:02:13,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 20:02:13,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:02:13,865 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:02:13,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e5ec122-e7bc-4d27-b7c9-a0de3b0047d5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-20 20:02:14,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e5ec122-e7bc-4d27-b7c9-a0de3b0047d5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:02:14,072 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:02:14,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:02:14,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1409252445, now seen corresponding path program 1 times [2022-11-20 20:02:14,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:02:14,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667227215] [2022-11-20 20:02:14,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:02:14,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:02:14,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:02:15,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:02:15,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:02:15,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667227215] [2022-11-20 20:02:15,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667227215] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:02:15,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46671313] [2022-11-20 20:02:15,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:02:15,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:02:15,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e5ec122-e7bc-4d27-b7c9-a0de3b0047d5/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:02:15,674 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e5ec122-e7bc-4d27-b7c9-a0de3b0047d5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:02:15,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e5ec122-e7bc-4d27-b7c9-a0de3b0047d5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 20:02:15,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:02:15,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 125 conjunts are in the unsatisfiable core [2022-11-20 20:02:15,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:02:15,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-20 20:02:16,028 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-20 20:02:16,029 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 [2022-11-20 20:02:16,047 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 [2022-11-20 20:02:16,056 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 [2022-11-20 20:02:16,099 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2022-11-20 20:02:16,099 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 [2022-11-20 20:02:16,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-11-20 20:02:16,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-11-20 20:02:16,373 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 [2022-11-20 20:02:16,428 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 [2022-11-20 20:02:16,443 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1071 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_1072 (Array Int Int))) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (not (= |chain_node_~node~0#1.base| 0)) (= |c_#memory_$Pointer$.base| (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_1071) |c_chain_node_#in~ppnode#1.base| (store (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_1072) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| |chain_node_~node~0#1.base|))))) is different from true [2022-11-20 20:02:16,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:16,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:16,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:16,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-11-20 20:02:16,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 15 [2022-11-20 20:02:16,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2022-11-20 20:02:16,596 WARN L859 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int) (v_ArrVal_1079 (Array Int Int))) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.base| (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| (let ((.cse0 (store (store (select |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base|) 0 0) 4 0))) (store .cse0 0 (select (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| .cse0) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|)))) |c_chain_node_#in~ppnode#1.base| v_ArrVal_1079)))) is different from true [2022-11-20 20:02:16,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:16,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:16,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:16,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 53 [2022-11-20 20:02:16,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:16,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:16,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 54 [2022-11-20 20:02:16,640 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 23 treesize of output 17 [2022-11-20 20:02:16,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:16,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-11-20 20:02:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2022-11-20 20:02:16,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:02:19,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46671313] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:02:19,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [639910281] [2022-11-20 20:02:19,284 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-20 20:02:19,284 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:02:19,285 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:02:19,285 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:02:19,285 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:02:19,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:19,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:19,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:19,375 INFO L321 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-11-20 20:02:19,375 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 [2022-11-20 20:02:19,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:19,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:19,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:19,462 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-20 20:02:19,463 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 [2022-11-20 20:02:19,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:19,566 INFO L321 Elim1Store]: treesize reduction 100, result has 29.1 percent of original size [2022-11-20 20:02:19,566 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 162 [2022-11-20 20:02:19,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:19,638 INFO L321 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2022-11-20 20:02:19,639 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 [2022-11-20 20:02:19,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:19,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-20 20:02:19,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:19,668 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:02:19,669 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 [2022-11-20 20:02:19,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:19,753 INFO L321 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2022-11-20 20:02:19,753 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 [2022-11-20 20:02:19,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-20 20:02:19,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:02:19,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:19,855 INFO L321 Elim1Store]: treesize reduction 72, result has 48.9 percent of original size [2022-11-20 20:02:19,855 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 [2022-11-20 20:02:19,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:19,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:19,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 23 [2022-11-20 20:02:19,890 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 [2022-11-20 20:02:19,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:19,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:19,906 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 [2022-11-20 20:02:19,915 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 [2022-11-20 20:02:20,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:02:20,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,069 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 [2022-11-20 20:02:20,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,087 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 [2022-11-20 20:02:20,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:02:20,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,214 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 [2022-11-20 20:02:20,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,230 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 [2022-11-20 20:02:20,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:02:20,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:02:20,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-11-20 20:02:20,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,402 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:02:20,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 164 treesize of output 113 [2022-11-20 20:02:20,422 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 66 treesize of output 60 [2022-11-20 20:02:20,433 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 [2022-11-20 20:02:20,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 20:02:20,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 20:02:20,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,520 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 41 treesize of output 42 [2022-11-20 20:02:20,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,544 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:02:20,544 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 [2022-11-20 20:02:20,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,689 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 [2022-11-20 20:02:20,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,712 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:02:20,712 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 [2022-11-20 20:02:20,728 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 [2022-11-20 20:02:20,741 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 [2022-11-20 20:02:20,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,851 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:02:20,852 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 [2022-11-20 20:02:20,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:20,877 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 33 treesize of output 13 [2022-11-20 20:02:20,890 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 [2022-11-20 20:02:20,901 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 [2022-11-20 20:02:21,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:02:21,655 INFO L197 IcfgInterpreter]: Interpreting procedure chain_node with input of size 12 for LOIs [2022-11-20 20:02:21,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:21,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:21,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:21,700 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-20 20:02:21,701 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 [2022-11-20 20:02:21,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:21,729 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 57 treesize of output 18 [2022-11-20 20:02:21,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:21,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-20 20:02:21,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:02:21,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:02:21,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:21,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:21,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:21,813 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2022-11-20 20:02:21,814 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 [2022-11-20 20:02:21,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:21,852 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 57 treesize of output 18 [2022-11-20 20:02:21,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:02:21,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:21,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-20 20:02:21,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:21,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:21,918 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-20 20:02:21,918 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 [2022-11-20 20:02:21,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-20 20:02:21,933 INFO L197 IcfgInterpreter]: Interpreting procedure check_seq_next with input of size 41 for LOIs [2022-11-20 20:02:21,963 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 27 for LOIs [2022-11-20 20:02:21,970 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:02:25,647 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1514#(and (exists ((|v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_27| Int)) (and (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_27|) 0) 0) (<= 0 |v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_27|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_27|) 0) 0))) (= |#NULL.offset| 0) (exists ((|v_ULTIMATE.start_create_sll_~#list~0#1.base_27| Int)) (and (<= 0 |v_ULTIMATE.start_create_sll_~#list~0#1.base_27|) (= (select |#valid| |v_ULTIMATE.start_create_sll_~#list~0#1.base_27|) 0))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:02:25,648 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:02:25,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:02:25,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2022-11-20 20:02:25,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777756364] [2022-11-20 20:02:25,648 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 20:02:25,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 20:02:25,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:02:25,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 20:02:25,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1197, Unknown=7, NotChecked=142, Total=1482 [2022-11-20 20:02:25,650 INFO L87 Difference]: Start difference. First operand 100 states and 125 transitions. Second operand has 23 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 20 states have internal predecessors, (34), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 20:02:27,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:02:27,393 INFO L93 Difference]: Finished difference Result 157 states and 199 transitions. [2022-11-20 20:02:27,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 20:02:27,394 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 20 states have internal predecessors, (34), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 27 [2022-11-20 20:02:27,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:02:27,395 INFO L225 Difference]: With dead ends: 157 [2022-11-20 20:02:27,395 INFO L226 Difference]: Without dead ends: 154 [2022-11-20 20:02:27,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=189, Invalid=1792, Unknown=7, NotChecked=174, Total=2162 [2022-11-20 20:02:27,397 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 149 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 1105 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 1503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 338 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:02:27,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 460 Invalid, 1503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1105 Invalid, 0 Unknown, 338 Unchecked, 1.2s Time] [2022-11-20 20:02:27,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-20 20:02:27,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2022-11-20 20:02:27,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 88 states have (on average 1.2840909090909092) internal successors, (113), 99 states have internal predecessors, (113), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-20 20:02:27,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 150 transitions. [2022-11-20 20:02:27,434 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 150 transitions. Word has length 27 [2022-11-20 20:02:27,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:02:27,435 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 150 transitions. [2022-11-20 20:02:27,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 20 states have internal predecessors, (34), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 20:02:27,435 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 150 transitions. [2022-11-20 20:02:27,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 20:02:27,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:02:27,437 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:02:27,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e5ec122-e7bc-4d27-b7c9-a0de3b0047d5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 20:02:27,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e5ec122-e7bc-4d27-b7c9-a0de3b0047d5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:02:27,644 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:02:27,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:02:27,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1814393797, now seen corresponding path program 1 times [2022-11-20 20:02:27,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:02:27,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046020195] [2022-11-20 20:02:27,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:02:27,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:02:27,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:02:28,815 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:02:28,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:02:28,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046020195] [2022-11-20 20:02:28,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046020195] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:02:28,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642307958] [2022-11-20 20:02:28,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:02:28,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:02:28,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e5ec122-e7bc-4d27-b7c9-a0de3b0047d5/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:02:28,818 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e5ec122-e7bc-4d27-b7c9-a0de3b0047d5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:02:28,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e5ec122-e7bc-4d27-b7c9-a0de3b0047d5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 20:02:29,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:02:29,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-20 20:02:29,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:02:29,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-20 20:02:29,246 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-20 20:02:29,247 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 [2022-11-20 20:02:29,253 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 [2022-11-20 20:02:29,259 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 [2022-11-20 20:02:29,295 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2022-11-20 20:02:29,296 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 [2022-11-20 20:02:29,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-11-20 20:02:29,409 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 [2022-11-20 20:02:29,470 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 [2022-11-20 20:02:29,481 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1516 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_1517 (Array Int Int))) (and (= |c_#memory_$Pointer$.base| (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_1516) |c_chain_node_#in~ppnode#1.base| v_ArrVal_1517)) (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|))) is different from true [2022-11-20 20:02:29,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:29,507 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 20:02:29,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 33 [2022-11-20 20:02:29,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-20 20:02:29,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-20 20:02:29,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-11-20 20:02:29,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:02:29,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642307958] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:02:29,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [958768736] [2022-11-20 20:02:29,728 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-20 20:02:29,728 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:02:29,728 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:02:29,728 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:02:29,729 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:02:29,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:29,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:29,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:29,850 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-20 20:02:29,851 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 [2022-11-20 20:02:29,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:29,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:29,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:29,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2022-11-20 20:02:29,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:29,974 INFO L321 Elim1Store]: treesize reduction 100, result has 29.1 percent of original size [2022-11-20 20:02:29,975 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 [2022-11-20 20:02:29,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:29,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:29,991 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 [2022-11-20 20:02:29,998 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 [2022-11-20 20:02:30,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:30,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:30,014 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 [2022-11-20 20:02:30,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-20 20:02:30,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:30,142 INFO L321 Elim1Store]: treesize reduction 72, result has 48.9 percent of original size [2022-11-20 20:02:30,142 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 [2022-11-20 20:02:30,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:30,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:30,163 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 [2022-11-20 20:02:30,172 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 [2022-11-20 20:02:30,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:30,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:30,192 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 [2022-11-20 20:02:30,202 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 [2022-11-20 20:02:30,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:30,347 INFO L321 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2022-11-20 20:02:30,347 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 [2022-11-20 20:02:30,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:02:30,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-20 20:02:30,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:02:30,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:30,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:30,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:30,484 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 [2022-11-20 20:02:30,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:02:30,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:30,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:30,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:30,536 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 [2022-11-20 20:02:30,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:02:30,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:30,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:30,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:30,687 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 [2022-11-20 20:02:30,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:02:30,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:30,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:30,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:30,717 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 [2022-11-20 20:02:31,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 20:02:31,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:31,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:31,064 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:02:31,065 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 [2022-11-20 20:02:31,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:31,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:31,136 INFO L321 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2022-11-20 20:02:31,137 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 [2022-11-20 20:02:31,199 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 [2022-11-20 20:02:31,213 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 [2022-11-20 20:02:31,232 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 [2022-11-20 20:02:31,247 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 [2022-11-20 20:02:32,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:32,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:32,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:32,062 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 20:02:32,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 339 treesize of output 266 [2022-11-20 20:02:32,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:32,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:32,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:32,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:32,089 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-20 20:02:32,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 271 treesize of output 243 [2022-11-20 20:02:32,121 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 [2022-11-20 20:02:32,133 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 [2022-11-20 20:02:32,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:32,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:32,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:32,781 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 20:02:32,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 339 treesize of output 266 [2022-11-20 20:02:32,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:32,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:32,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:32,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:32,812 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-20 20:02:32,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 271 treesize of output 243 [2022-11-20 20:02:32,836 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 [2022-11-20 20:02:32,850 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 [2022-11-20 20:02:33,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 20:02:33,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:33,527 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:02:33,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 20:02:33,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:33,548 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:02:33,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 20:02:33,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:33,630 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 20:02:33,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 3 [2022-11-20 20:02:33,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:33,644 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 20:02:33,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 3 [2022-11-20 20:02:33,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:33,767 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 20:02:33,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 3 [2022-11-20 20:02:33,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:33,786 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 20:02:33,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 3 [2022-11-20 20:02:33,967 INFO L321 Elim1Store]: treesize reduction 18, result has 62.5 percent of original size [2022-11-20 20:02:33,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 358 treesize of output 378 [2022-11-20 20:02:34,415 INFO L197 IcfgInterpreter]: Interpreting procedure chain_node with input of size 12 for LOIs [2022-11-20 20:02:34,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:34,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:34,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:34,467 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-20 20:02:34,468 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 [2022-11-20 20:02:34,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:34,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:34,502 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 [2022-11-20 20:02:34,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:34,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-20 20:02:34,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:34,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:34,551 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-20 20:02:34,551 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 [2022-11-20 20:02:34,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:34,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:34,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:34,604 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2022-11-20 20:02:34,604 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 [2022-11-20 20:02:34,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:34,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:34,620 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 [2022-11-20 20:02:34,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:34,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-20 20:02:34,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:02:34,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-20 20:02:34,673 INFO L197 IcfgInterpreter]: Interpreting procedure check_seq_next with input of size 114 for LOIs [2022-11-20 20:02:34,853 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 100 for LOIs [2022-11-20 20:02:34,901 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:02:41,781 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2102#(and (or (and (exists ((v_DerPreprocessor_64 (Array Int Int)) (v_DerPreprocessor_65 (Array Int Int)) (|v_ULTIMATE.start_create_sll_~#list~0#1.base_30| Int) (v_DerPreprocessor_67 (Array Int Int)) (v_DerPreprocessor_68 (Array Int Int))) (and (= (select |#valid| |v_ULTIMATE.start_create_sll_~#list~0#1.base_30|) 0) (= (select (store (store (store (store |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_30|) 0) v_DerPreprocessor_64) |v_ULTIMATE.start_create_sll_~#list~0#1.base_30| v_DerPreprocessor_65) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_30|) 0) v_DerPreprocessor_64) |v_ULTIMATE.start_create_sll_~#list~0#1.base_30| v_DerPreprocessor_65) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_30|) 0)) v_DerPreprocessor_64) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_30|) 0)) 4) 0) (= 8 (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_30|) 0))) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_30|) 0)) 1) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~#list~0#1.base_30|) 0) 0) (= (select (select (store (store (store (store |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_30|) 0) v_DerPreprocessor_64) |v_ULTIMATE.start_create_sll_~#list~0#1.base_30| v_DerPreprocessor_65) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_30|) 0) v_DerPreprocessor_64) |v_ULTIMATE.start_create_sll_~#list~0#1.base_30| v_DerPreprocessor_65) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_30|) 0)) 4) 0) (<= 0 |v_ULTIMATE.start_create_sll_~#list~0#1.base_30|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_30|) 0)) 4) 0) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_30|) 0) |v_ULTIMATE.start_create_sll_~#list~0#1.base_30|)) (= (select v_DerPreprocessor_65 0) 0) (= (select (select (store (store (store (store |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_30|) 0) v_DerPreprocessor_64) |v_ULTIMATE.start_create_sll_~#list~0#1.base_30| v_DerPreprocessor_65) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_30|) 0) v_DerPreprocessor_64) |v_ULTIMATE.start_create_sll_~#list~0#1.base_30| v_DerPreprocessor_65) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_30|) 0)) 0) 0) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_30|) 0) 0)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_30|) 0) (select v_DerPreprocessor_68 0)) (< (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_30|) 0) |#StackHeapBarrier|) (= v_DerPreprocessor_67 (select (store (store (store (store |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_30|) 0) v_DerPreprocessor_67) |v_ULTIMATE.start_create_sll_~#list~0#1.base_30| v_DerPreprocessor_68) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_30|) 0) v_DerPreprocessor_67) |v_ULTIMATE.start_create_sll_~#list~0#1.base_30| v_DerPreprocessor_68) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_30|) 0))) (= (select (select (store (store (store (store |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_30|) 0) v_DerPreprocessor_67) |v_ULTIMATE.start_create_sll_~#list~0#1.base_30| v_DerPreprocessor_68) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_30|) 0) v_DerPreprocessor_67) |v_ULTIMATE.start_create_sll_~#list~0#1.base_30| v_DerPreprocessor_68) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_30|) 0)) 0) 0) (= (select (select (store (store (store (store |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_30|) 0) v_DerPreprocessor_67) |v_ULTIMATE.start_create_sll_~#list~0#1.base_30| v_DerPreprocessor_68) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_30|) 0) v_DerPreprocessor_67) |v_ULTIMATE.start_create_sll_~#list~0#1.base_30| v_DerPreprocessor_68) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_30|) 0)) 4) 0))) (exists ((|v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_43| Int)) (and (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_43|) 0) 0) (<= 0 |v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_43|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_43|) 0) 0))) (= |#NULL.offset| 0) (= |#NULL.base| 0)) (and (exists ((|v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_43| Int)) (and (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_43|) 0) 0) (<= 0 |v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_43|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_43|) 0) 0))) (= |#NULL.offset| 0) (exists ((|v_ULTIMATE.start_create_sll_~#list~0#1.base_30| Int)) (and (= (select |#valid| |v_ULTIMATE.start_create_sll_~#list~0#1.base_30|) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~#list~0#1.base_30|) 0) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_30|) 0) |v_ULTIMATE.start_create_sll_~#list~0#1.base_30|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~#list~0#1.base_30|) 4) 0) (<= 0 |v_ULTIMATE.start_create_sll_~#list~0#1.base_30|) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_30| 0)) (< |v_ULTIMATE.start_create_sll_~#list~0#1.base_30| |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_30|) 4) 0) (= (select |#length| |v_ULTIMATE.start_create_sll_~#list~0#1.base_30|) 8))) (= |#NULL.base| 0))) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-20 20:02:41,781 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:02:41,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:02:41,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2022-11-20 20:02:41,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912769005] [2022-11-20 20:02:41,782 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 20:02:41,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 20:02:41,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:02:41,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 20:02:41,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1002, Unknown=25, NotChecked=64, Total=1190 [2022-11-20 20:02:41,783 INFO L87 Difference]: Start difference. First operand 119 states and 150 transitions. Second operand has 17 states, 11 states have (on average 3.0) internal successors, (33), 15 states have internal predecessors, (33), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 20:02:43,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:02:43,007 INFO L93 Difference]: Finished difference Result 172 states and 219 transitions. [2022-11-20 20:02:43,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 20:02:43,008 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 11 states have (on average 3.0) internal successors, (33), 15 states have internal predecessors, (33), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 27 [2022-11-20 20:02:43,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:02:43,009 INFO L225 Difference]: With dead ends: 172 [2022-11-20 20:02:43,009 INFO L226 Difference]: Without dead ends: 169 [2022-11-20 20:02:43,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=136, Invalid=1402, Unknown=26, NotChecked=76, Total=1640 [2022-11-20 20:02:43,011 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 105 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 20:02:43,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 573 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 952 Invalid, 0 Unknown, 149 Unchecked, 0.9s Time] [2022-11-20 20:02:43,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-20 20:02:43,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 119. [2022-11-20 20:02:43,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 88 states have (on average 1.2840909090909092) internal successors, (113), 99 states have internal predecessors, (113), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-20 20:02:43,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 150 transitions. [2022-11-20 20:02:43,043 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 150 transitions. Word has length 27 [2022-11-20 20:02:43,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:02:43,043 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 150 transitions. [2022-11-20 20:02:43,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 11 states have (on average 3.0) internal successors, (33), 15 states have internal predecessors, (33), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 20:02:43,044 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 150 transitions. [2022-11-20 20:02:43,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 20:02:43,051 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:02:43,052 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] [2022-11-20 20:02:43,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e5ec122-e7bc-4d27-b7c9-a0de3b0047d5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 20:02:43,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e5ec122-e7bc-4d27-b7c9-a0de3b0047d5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:02:43,264 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:02:43,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:02:43,264 INFO L85 PathProgramCache]: Analyzing trace with hash 128159807, now seen corresponding path program 1 times [2022-11-20 20:02:43,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:02:43,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277431950] [2022-11-20 20:02:43,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:02:43,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:02:43,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:02:43,343 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 20:02:43,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:02:43,435 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-20 20:02:43,435 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 20:02:43,436 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location failErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-20 20:02:43,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 20:02:43,444 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-20 20:02:43,448 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-20 20:02:43,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 08:02:43 BoogieIcfgContainer [2022-11-20 20:02:43,508 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-20 20:02:43,509 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-20 20:02:43,509 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-20 20:02:43,509 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-20 20:02:43,510 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:01:25" (3/4) ... [2022-11-20 20:02:43,512 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-20 20:02:43,577 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e5ec122-e7bc-4d27-b7c9-a0de3b0047d5/bin/utaipan-6cKwYrpEi9/witness.graphml [2022-11-20 20:02:43,577 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-20 20:02:43,578 INFO L158 Benchmark]: Toolchain (without parser) took 79663.86ms. Allocated memory was 178.3MB in the beginning and 469.8MB in the end (delta: 291.5MB). Free memory was 133.5MB in the beginning and 314.4MB in the end (delta: -180.9MB). Peak memory consumption was 111.6MB. Max. memory is 16.1GB. [2022-11-20 20:02:43,578 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 138.4MB. Free memory is still 82.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 20:02:43,578 INFO L158 Benchmark]: CACSL2BoogieTranslator took 592.52ms. Allocated memory is still 178.3MB. Free memory was 133.5MB in the beginning and 115.1MB in the end (delta: 18.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-11-20 20:02:43,583 INFO L158 Benchmark]: Boogie Procedure Inliner took 58.91ms. Allocated memory is still 178.3MB. Free memory was 115.1MB in the beginning and 113.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 20:02:43,583 INFO L158 Benchmark]: Boogie Preprocessor took 50.05ms. Allocated memory is still 178.3MB. Free memory was 113.0MB in the beginning and 110.4MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 20:02:43,584 INFO L158 Benchmark]: RCFGBuilder took 891.64ms. Allocated memory is still 178.3MB. Free memory was 110.4MB in the beginning and 132.6MB in the end (delta: -22.1MB). Peak memory consumption was 21.3MB. Max. memory is 16.1GB. [2022-11-20 20:02:43,589 INFO L158 Benchmark]: TraceAbstraction took 77995.29ms. Allocated memory was 178.3MB in the beginning and 469.8MB in the end (delta: 291.5MB). Free memory was 132.0MB in the beginning and 317.6MB in the end (delta: -185.5MB). Peak memory consumption was 107.0MB. Max. memory is 16.1GB. [2022-11-20 20:02:43,589 INFO L158 Benchmark]: Witness Printer took 68.31ms. Allocated memory is still 469.8MB. Free memory was 317.6MB in the beginning and 314.4MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 20:02:43,591 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 138.4MB. Free memory is still 82.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 592.52ms. Allocated memory is still 178.3MB. Free memory was 133.5MB in the beginning and 115.1MB in the end (delta: 18.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 58.91ms. Allocated memory is still 178.3MB. Free memory was 115.1MB in the beginning and 113.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 50.05ms. Allocated memory is still 178.3MB. Free memory was 113.0MB in the beginning and 110.4MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 891.64ms. Allocated memory is still 178.3MB. Free memory was 110.4MB in the beginning and 132.6MB in the end (delta: -22.1MB). Peak memory consumption was 21.3MB. Max. memory is 16.1GB. * TraceAbstraction took 77995.29ms. Allocated memory was 178.3MB in the beginning and 469.8MB in the end (delta: 291.5MB). Free memory was 132.0MB in the beginning and 317.6MB in the end (delta: -185.5MB). Peak memory consumption was 107.0MB. Max. memory is 16.1GB. * Witness Printer took 68.31ms. Allocated memory is still 469.8MB. Free memory was 317.6MB in the beginning and 314.4MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 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={5:0}, pp1={7:0}, pp1={7:0}, 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={5:0}, pp1={7:0}, pp1={7:0}, 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={5:0}, pp1={7:0}, pp1={7:0}, 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={7:0}, 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={0:0}, beg={-1:0}, 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: 77.9s, OverallIterations: 6, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 5.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 525 SdHoareTripleChecker+Valid, 3.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 515 mSDsluCounter, 1885 SdHoareTripleChecker+Invalid, 3.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 939 IncrementalHoareTripleChecker+Unchecked, 1584 mSDsCounter, 171 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3324 IncrementalHoareTripleChecker+Invalid, 4434 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 171 mSolverCounterUnsat, 301 mSDtfsCounter, 3324 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 328 GetRequests, 152 SyntacticMatches, 7 SemanticMatches, 169 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 1686 ImplicationChecksByTransitivity, 43.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=119occurred in iteration=4, InterpolantAutomatonStates: 57, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 100 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 14.8s InterpolantComputationTime, 241 NumberOfCodeBlocks, 241 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 204 ConstructedInterpolants, 21 QuantifiedInterpolants, 5350 SizeOfPredicates, 104 NumberOfNonLiveVariables, 2008 ConjunctsInSsa, 361 ConjunctsInUnsatCore, 9 InterpolantComputations, 1 PerfectInterpolantSequences, 23/42 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-20 20:02:43,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e5ec122-e7bc-4d27-b7c9-a0de3b0047d5/bin/utaipan-6cKwYrpEi9/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