./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 dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b223c6c2-911b-40ae-982e-d2c3fd78befd/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b223c6c2-911b-40ae-982e-d2c3fd78befd/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b223c6c2-911b-40ae-982e-d2c3fd78befd/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b223c6c2-911b-40ae-982e-d2c3fd78befd/bin/utaipan-G1rejxKTta/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_b223c6c2-911b-40ae-982e-d2c3fd78befd/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b223c6c2-911b-40ae-982e-d2c3fd78befd/bin/utaipan-G1rejxKTta --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-dbf71c6-m [2022-10-17 17:36:03,745 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:36:03,748 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:36:03,806 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:36:03,807 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:36:03,811 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:36:03,814 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:36:03,818 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:36:03,821 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:36:03,830 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:36:03,831 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:36:03,834 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:36:03,834 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:36:03,837 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:36:03,839 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:36:03,842 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:36:03,844 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:36:03,845 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:36:03,847 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:36:03,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:36:03,861 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:36:03,863 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:36:03,867 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:36:03,868 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:36:03,878 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:36:03,879 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:36:03,879 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:36:03,881 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:36:03,882 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:36:03,883 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:36:03,883 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:36:03,885 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:36:03,886 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:36:03,888 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:36:03,889 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:36:03,889 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:36:03,890 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:36:03,890 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:36:03,891 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:36:03,892 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:36:03,892 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:36:03,893 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b223c6c2-911b-40ae-982e-d2c3fd78befd/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:36:03,944 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:36:03,944 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:36:03,945 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:36:03,945 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:36:03,946 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:36:03,947 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:36:03,947 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:36:03,947 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:36:03,947 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:36:03,948 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:36:03,949 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:36:03,949 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:36:03,949 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:36:03,949 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:36:03,950 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:36:03,950 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:36:03,950 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:36:03,950 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:36:03,951 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:36:03,951 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:36:03,952 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:36:03,952 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:36:03,952 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:36:03,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:36:03,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:36:03,954 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:36:03,955 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:36:03,955 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:36:03,955 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:36:03,955 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:36:03,956 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:36:03,956 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:36:03,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:36:03,957 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:36:03,957 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:36:03,957 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:36:03,957 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:36:03,958 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:36:03,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:36:03,958 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:36:03,958 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:36:03,959 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_b223c6c2-911b-40ae-982e-d2c3fd78befd/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b223c6c2-911b-40ae-982e-d2c3fd78befd/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f8d14145608efc0a8f321a178564faff63399ecbab28641c0c2971fec318068f [2022-10-17 17:36:04,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:36:04,304 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:36:04,308 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:36:04,309 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:36:04,310 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:36:04,312 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b223c6c2-911b-40ae-982e-d2c3fd78befd/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2022-10-17 17:36:04,392 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b223c6c2-911b-40ae-982e-d2c3fd78befd/bin/utaipan-G1rejxKTta/data/ee8d1acc2/32c6d02a41e74887800b23bc12747da8/FLAG9fe29cc2b [2022-10-17 17:36:05,040 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:36:05,041 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b223c6c2-911b-40ae-982e-d2c3fd78befd/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2022-10-17 17:36:05,055 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b223c6c2-911b-40ae-982e-d2c3fd78befd/bin/utaipan-G1rejxKTta/data/ee8d1acc2/32c6d02a41e74887800b23bc12747da8/FLAG9fe29cc2b [2022-10-17 17:36:05,319 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b223c6c2-911b-40ae-982e-d2c3fd78befd/bin/utaipan-G1rejxKTta/data/ee8d1acc2/32c6d02a41e74887800b23bc12747da8 [2022-10-17 17:36:05,328 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:36:05,329 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:36:05,331 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:36:05,331 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:36:05,335 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:36:05,336 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:36:05" (1/1) ... [2022-10-17 17:36:05,337 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3833aca6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:05, skipping insertion in model container [2022-10-17 17:36:05,340 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:36:05" (1/1) ... [2022-10-17 17:36:05,347 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:36:05,415 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:36:05,704 WARN L230 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_b223c6c2-911b-40ae-982e-d2c3fd78befd/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i[22636,22649] [2022-10-17 17:36:05,751 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:36:05,766 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:36:05,824 WARN L230 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_b223c6c2-911b-40ae-982e-d2c3fd78befd/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i[22636,22649] [2022-10-17 17:36:05,855 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:36:05,892 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:36:05,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:05 WrapperNode [2022-10-17 17:36:05,893 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:36:05,894 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:36:05,894 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:36:05,895 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:36:05,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:05" (1/1) ... [2022-10-17 17:36:05,919 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:05" (1/1) ... [2022-10-17 17:36:05,950 INFO L138 Inliner]: procedures = 129, calls = 79, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 200 [2022-10-17 17:36:05,951 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:36:05,952 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:36:05,952 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:36:05,952 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:36:05,963 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:05" (1/1) ... [2022-10-17 17:36:05,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:05" (1/1) ... [2022-10-17 17:36:05,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:05" (1/1) ... [2022-10-17 17:36:05,978 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:05" (1/1) ... [2022-10-17 17:36:05,996 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:05" (1/1) ... [2022-10-17 17:36:06,005 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:05" (1/1) ... [2022-10-17 17:36:06,017 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:05" (1/1) ... [2022-10-17 17:36:06,018 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:05" (1/1) ... [2022-10-17 17:36:06,023 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:36:06,024 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:36:06,024 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:36:06,024 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:36:06,026 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:05" (1/1) ... [2022-10-17 17:36:06,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:36:06,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b223c6c2-911b-40ae-982e-d2c3fd78befd/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:36:06,058 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b223c6c2-911b-40ae-982e-d2c3fd78befd/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:36:06,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b223c6c2-911b-40ae-982e-d2c3fd78befd/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:36:06,101 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2022-10-17 17:36:06,101 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2022-10-17 17:36:06,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 17:36:06,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:36:06,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:36:06,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 17:36:06,102 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 17:36:06,102 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2022-10-17 17:36:06,103 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2022-10-17 17:36:06,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:36:06,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-10-17 17:36:06,103 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2022-10-17 17:36:06,103 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2022-10-17 17:36:06,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:36:06,104 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2022-10-17 17:36:06,104 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2022-10-17 17:36:06,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:36:06,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:36:06,244 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:36:06,246 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:36:06,756 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:36:06,857 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:36:06,857 INFO L300 CfgBuilder]: Removed 33 assume(true) statements. [2022-10-17 17:36:06,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:36:06 BoogieIcfgContainer [2022-10-17 17:36:06,861 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:36:06,863 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:36:06,864 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:36:06,868 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:36:06,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:36:05" (1/3) ... [2022-10-17 17:36:06,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b4ee4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:36:06, skipping insertion in model container [2022-10-17 17:36:06,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:05" (2/3) ... [2022-10-17 17:36:06,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b4ee4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:36:06, skipping insertion in model container [2022-10-17 17:36:06,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:36:06" (3/3) ... [2022-10-17 17:36:06,872 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2022-10-17 17:36:06,894 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:36:06,894 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:36:06,957 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:36:06,966 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;@5c312c97, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:36:06,966 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:36:06,972 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) [2022-10-17 17:36:06,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-17 17:36:06,981 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:06,981 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:36:06,982 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:06,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:06,988 INFO L85 PathProgramCache]: Analyzing trace with hash -996344974, now seen corresponding path program 1 times [2022-10-17 17:36:06,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:06,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580740614] [2022-10-17 17:36:07,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:07,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:07,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:07,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:36:07,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:07,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580740614] [2022-10-17 17:36:07,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580740614] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:36:07,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:36:07,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:36:07,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327348097] [2022-10-17 17:36:07,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:36:07,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 17:36:07,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:07,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 17:36:07,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:36:07,219 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) [2022-10-17 17:36:07,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:36:07,288 INFO L93 Difference]: Finished difference Result 151 states and 261 transitions. [2022-10-17 17:36:07,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 17:36:07,291 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 [2022-10-17 17:36:07,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:36:07,299 INFO L225 Difference]: With dead ends: 151 [2022-10-17 17:36:07,300 INFO L226 Difference]: Without dead ends: 74 [2022-10-17 17:36:07,304 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 [2022-10-17 17:36:07,308 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 [2022-10-17 17:36:07,309 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] [2022-10-17 17:36:07,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-10-17 17:36:07,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-10-17 17:36:07,351 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) [2022-10-17 17:36:07,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 94 transitions. [2022-10-17 17:36:07,355 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 94 transitions. Word has length 13 [2022-10-17 17:36:07,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:36:07,356 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 94 transitions. [2022-10-17 17:36:07,356 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) [2022-10-17 17:36:07,357 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 94 transitions. [2022-10-17 17:36:07,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-10-17 17:36:07,358 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:07,358 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] [2022-10-17 17:36:07,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:36:07,359 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:07,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:07,360 INFO L85 PathProgramCache]: Analyzing trace with hash -811379383, now seen corresponding path program 1 times [2022-10-17 17:36:07,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:07,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814131000] [2022-10-17 17:36:07,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:07,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:07,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:10,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:36:10,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:10,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814131000] [2022-10-17 17:36:10,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814131000] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:36:10,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811004264] [2022-10-17 17:36:10,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:10,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:36:10,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b223c6c2-911b-40ae-982e-d2c3fd78befd/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:36:10,333 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b223c6c2-911b-40ae-982e-d2c3fd78befd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:36:10,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b223c6c2-911b-40ae-982e-d2c3fd78befd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:36:10,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:10,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 87 conjunts are in the unsatisfiable core [2022-10-17 17:36:10,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:36:10,791 INFO L356 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-10-17 17:36:10,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:10,802 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:10,814 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:10,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:10,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:10,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:10,909 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$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 [2022-10-17 17:36:11,275 INFO L356 Elim1Store]: treesize reduction 48, result has 43.5 percent of original size [2022-10-17 17:36:11,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:11,347 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:11,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:11,506 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-10-17 17:36:11,507 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:11,578 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:36:11,579 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:11,606 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_309 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_310 (Array Int Int))) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (not (= |chain_node_~node~0#1.base| 0)) (= (store (store |c_old(#memory_$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 [2022-10-17 17:36:11,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:11,691 INFO L356 Elim1Store]: treesize reduction 61, result has 37.1 percent of original size [2022-10-17 17:36:11,691 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:11,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:11,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:11,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:11,869 INFO L356 Elim1Store]: treesize reduction 73, result has 19.8 percent of original size [2022-10-17 17:36:11,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:11,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:11,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:12,325 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 17:36:12,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:12,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:12,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-10-17 17:36:12,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:36:12,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811004264] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:36:12,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [589177011] [2022-10-17 17:36:12,636 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-10-17 17:36:12,636 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:36:12,640 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:36:12,645 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:36:12,646 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:36:12,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:12,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:12,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:12,783 INFO L356 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-10-17 17:36:12,784 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:12,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:12,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:12,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:12,889 INFO L356 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-10-17 17:36:12,890 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:12,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:13,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:13,042 INFO L356 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2022-10-17 17:36:13,043 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:13,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:13,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:13,133 INFO L356 Elim1Store]: treesize reduction 72, result has 48.9 percent of original size [2022-10-17 17:36:13,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:13,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:13,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:13,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:13,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:13,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:13,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:13,200 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:13,215 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:13,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:13,383 INFO L356 Elim1Store]: treesize reduction 100, result has 29.1 percent of original size [2022-10-17 17:36:13,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:13,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:13,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:13,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:13,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:13,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:13,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:13,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:13,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:13,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:13,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:13,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:13,595 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:13,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:13,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:13,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:13,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:13,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:13,682 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:13,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:13,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:13,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:13,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:13,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:13,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:13,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:13,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:13,900 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:13,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:14,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-10-17 17:36:14,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:14,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:14,448 INFO L356 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2022-10-17 17:36:14,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:14,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:14,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:14,539 INFO L356 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2022-10-17 17:36:14,539 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:14,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:14,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:14,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:14,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:14,708 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-10-17 17:36:14,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:14,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:14,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:14,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:14,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:14,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:14,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:14,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:14,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:14,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:14,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:14,842 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 17:36:14,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:14,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-10-17 17:36:15,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:15,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:15,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:15,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:15,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:15,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:15,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:15,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:15,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:15,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:15,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:15,094 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 17:36:15,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:15,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:15,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:15,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:15,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:15,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:15,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:15,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:15,268 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:15,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:15,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:15,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:15,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:15,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:15,291 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 17:36:15,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:15,306 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:15,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:15,881 INFO L356 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-10-17 17:36:15,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:16,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:36:17,378 INFO L197 IcfgInterpreter]: Interpreting procedure chain_node with input of size 151 for LOIs [2022-10-17 17:36:17,777 INFO L197 IcfgInterpreter]: Interpreting procedure check_seq_next with input of size 164 for LOIs [2022-10-17 17:36:18,127 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 143 for LOIs [2022-10-17 17:36:18,199 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:36:33,480 WARN L233 SmtUtils]: Spent 13.72s on a formula simplification. DAG size of input: 214 DAG size of output: 204 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-10-17 17:36:41,271 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 [2022-10-17 17:36:41,272 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:36:41,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 17:36:41,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2022-10-17 17:36:41,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785451088] [2022-10-17 17:36:41,274 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 17:36:41,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-10-17 17:36:41,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:41,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-10-17 17:36:41,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1027, Unknown=30, NotChecked=134, Total=1332 [2022-10-17 17:36:41,278 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)