./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 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/bin/utaipan-I9t0OCRTmS/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_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/bin/utaipan-I9t0OCRTmS --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-8393723 [2022-11-19 07:41:05,267 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:41:05,269 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:41:05,312 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:41:05,314 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:41:05,318 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:41:05,320 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:41:05,323 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:41:05,325 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:41:05,331 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:41:05,333 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:41:05,334 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:41:05,335 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:41:05,337 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:41:05,338 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:41:05,340 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:41:05,342 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:41:05,343 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:41:05,345 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:41:05,351 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:41:05,353 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:41:05,355 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:41:05,358 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:41:05,359 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:41:05,367 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:41:05,370 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:41:05,370 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:41:05,371 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:41:05,373 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:41:05,374 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:41:05,374 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:41:05,375 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:41:05,377 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:41:05,379 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:41:05,381 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:41:05,382 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:41:05,382 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:41:05,383 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:41:05,383 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:41:05,384 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:41:05,385 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:41:05,386 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:41:05,422 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:41:05,422 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:41:05,423 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:41:05,423 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:41:05,424 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:41:05,424 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:41:05,424 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:41:05,425 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:41:05,425 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:41:05,425 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:41:05,426 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:41:05,426 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:41:05,427 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:41:05,427 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:41:05,427 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:41:05,427 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:41:05,428 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:41:05,428 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:41:05,428 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:41:05,429 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:41:05,429 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:41:05,429 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:41:05,429 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:41:05,430 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:41:05,430 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:41:05,430 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:41:05,430 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:41:05,430 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:41:05,431 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:41:05,431 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:41:05,431 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:41:05,431 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:41:05,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:41:05,432 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:41:05,432 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:41:05,432 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:41:05,433 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:41:05,433 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:41:05,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:41:05,433 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:41:05,433 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:41:05,434 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_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f8d14145608efc0a8f321a178564faff63399ecbab28641c0c2971fec318068f [2022-11-19 07:41:05,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:41:05,745 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:41:05,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:41:05,749 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:41:05,749 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:41:05,751 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2022-11-19 07:41:05,836 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/bin/utaipan-I9t0OCRTmS/data/4bdd88664/1a2b2988258c4fc1ba6fd4db55a172e1/FLAG5e827cd80 [2022-11-19 07:41:06,411 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:41:06,412 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2022-11-19 07:41:06,423 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/bin/utaipan-I9t0OCRTmS/data/4bdd88664/1a2b2988258c4fc1ba6fd4db55a172e1/FLAG5e827cd80 [2022-11-19 07:41:06,688 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/bin/utaipan-I9t0OCRTmS/data/4bdd88664/1a2b2988258c4fc1ba6fd4db55a172e1 [2022-11-19 07:41:06,691 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:41:06,692 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:41:06,694 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:41:06,694 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:41:06,700 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:41:06,701 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:41:06" (1/1) ... [2022-11-19 07:41:06,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bb65854 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:06, skipping insertion in model container [2022-11-19 07:41:06,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:41:06" (1/1) ... [2022-11-19 07:41:06,710 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:41:06,744 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:41:07,089 WARN L234 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_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i[22636,22649] [2022-11-19 07:41:07,147 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:41:07,158 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:41:07,208 WARN L234 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_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i[22636,22649] [2022-11-19 07:41:07,220 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:41:07,244 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:41:07,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:07 WrapperNode [2022-11-19 07:41:07,245 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:41:07,246 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:41:07,246 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:41:07,246 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:41:07,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:07" (1/1) ... [2022-11-19 07:41:07,267 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:07" (1/1) ... [2022-11-19 07:41:07,293 INFO L138 Inliner]: procedures = 129, calls = 79, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 200 [2022-11-19 07:41:07,293 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:41:07,294 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:41:07,294 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:41:07,294 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:41:07,303 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:07" (1/1) ... [2022-11-19 07:41:07,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:07" (1/1) ... [2022-11-19 07:41:07,308 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:07" (1/1) ... [2022-11-19 07:41:07,308 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:07" (1/1) ... [2022-11-19 07:41:07,317 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:07" (1/1) ... [2022-11-19 07:41:07,324 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:07" (1/1) ... [2022-11-19 07:41:07,326 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:07" (1/1) ... [2022-11-19 07:41:07,328 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:07" (1/1) ... [2022-11-19 07:41:07,332 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:41:07,332 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:41:07,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:41:07,333 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:41:07,334 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:07" (1/1) ... [2022-11-19 07:41:07,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:41:07,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:41:07,373 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:41:07,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:41:07,413 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2022-11-19 07:41:07,413 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2022-11-19 07:41:07,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 07:41:07,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:41:07,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:41:07,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 07:41:07,414 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 07:41:07,414 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2022-11-19 07:41:07,414 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2022-11-19 07:41:07,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:41:07,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 07:41:07,415 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2022-11-19 07:41:07,415 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2022-11-19 07:41:07,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:41:07,415 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2022-11-19 07:41:07,416 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2022-11-19 07:41:07,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:41:07,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:41:07,549 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:41:07,551 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:41:08,112 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:41:08,202 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:41:08,202 INFO L300 CfgBuilder]: Removed 33 assume(true) statements. [2022-11-19 07:41:08,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:41:08 BoogieIcfgContainer [2022-11-19 07:41:08,205 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:41:08,208 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:41:08,208 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:41:08,212 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:41:08,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:41:06" (1/3) ... [2022-11-19 07:41:08,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4745b7e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:41:08, skipping insertion in model container [2022-11-19 07:41:08,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:07" (2/3) ... [2022-11-19 07:41:08,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4745b7e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:41:08, skipping insertion in model container [2022-11-19 07:41:08,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:41:08" (3/3) ... [2022-11-19 07:41:08,215 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2022-11-19 07:41:08,238 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:41:08,238 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:41:08,312 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:41:08,324 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;@7daffd55, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:41:08,324 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:41:08,329 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) [2022-11-19 07:41:08,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 07:41:08,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:41:08,338 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:41:08,339 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:41:08,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:41:08,344 INFO L85 PathProgramCache]: Analyzing trace with hash -996344974, now seen corresponding path program 1 times [2022-11-19 07:41:08,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:41:08,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281469579] [2022-11-19 07:41:08,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:08,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:41:08,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:41:08,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:41:08,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:41:08,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281469579] [2022-11-19 07:41:08,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281469579] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:41:08,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:41:08,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:41:08,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577009018] [2022-11-19 07:41:08,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:41:08,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 07:41:08,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:41:08,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 07:41:08,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 07:41:08,676 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) [2022-11-19 07:41:08,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:41:08,803 INFO L93 Difference]: Finished difference Result 151 states and 261 transitions. [2022-11-19 07:41:08,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 07:41:08,806 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 [2022-11-19 07:41:08,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:41:08,816 INFO L225 Difference]: With dead ends: 151 [2022-11-19 07:41:08,816 INFO L226 Difference]: Without dead ends: 74 [2022-11-19 07:41:08,820 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 [2022-11-19 07:41:08,827 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:41:08,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 86 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:41:08,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-19 07:41:08,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-11-19 07:41:08,866 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) [2022-11-19 07:41:08,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 94 transitions. [2022-11-19 07:41:08,872 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 94 transitions. Word has length 13 [2022-11-19 07:41:08,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:41:08,872 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 94 transitions. [2022-11-19 07:41:08,873 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) [2022-11-19 07:41:08,873 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 94 transitions. [2022-11-19 07:41:08,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 07:41:08,874 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:41:08,875 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] [2022-11-19 07:41:08,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:41:08,875 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:41:08,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:41:08,876 INFO L85 PathProgramCache]: Analyzing trace with hash -811379383, now seen corresponding path program 1 times [2022-11-19 07:41:08,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:41:08,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327587775] [2022-11-19 07:41:08,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:08,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:41:09,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:41:11,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:41:11,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:41:11,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327587775] [2022-11-19 07:41:11,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327587775] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:41:11,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450695269] [2022-11-19 07:41:11,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:11,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:11,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:41:11,566 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:41:11,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:41:11,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:41:11,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-19 07:41:11,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:41:11,962 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-19 07:41:11,968 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 [2022-11-19 07:41:11,980 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 [2022-11-19 07:41:11,998 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 [2022-11-19 07:41:12,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:41:12,054 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 [2022-11-19 07:41:12,059 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 [2022-11-19 07:41:12,119 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 [2022-11-19 07:41:12,513 INFO L321 Elim1Store]: treesize reduction 48, result has 43.5 percent of original size [2022-11-19 07:41:12,519 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 [2022-11-19 07:41:12,582 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 [2022-11-19 07:41:12,599 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 [2022-11-19 07:41:12,752 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:41:12,753 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 [2022-11-19 07:41:12,823 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 07:41:12,824 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 [2022-11-19 07:41:12,850 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 [2022-11-19 07:41:12,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:12,946 INFO L321 Elim1Store]: treesize reduction 61, result has 37.1 percent of original size [2022-11-19 07:41:12,947 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 [2022-11-19 07:41:12,966 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 [2022-11-19 07:41:13,008 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 [2022-11-19 07:41:13,034 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 [2022-11-19 07:41:13,178 INFO L321 Elim1Store]: treesize reduction 73, result has 19.8 percent of original size [2022-11-19 07:41:13,178 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 [2022-11-19 07:41:13,196 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 [2022-11-19 07:41:13,258 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 [2022-11-19 07:41:13,612 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:41:13,613 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 [2022-11-19 07:41:13,627 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 [2022-11-19 07:41:13,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-19 07:41:13,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:41:13,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450695269] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:41:13,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [553329210] [2022-11-19 07:41:13,948 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-19 07:41:13,949 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:41:13,954 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:41:13,961 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:41:13,962 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:41:14,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:14,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:14,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:14,112 INFO L321 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-11-19 07:41:14,112 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 [2022-11-19 07:41:14,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:14,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:14,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:14,243 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-19 07:41:14,243 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 [2022-11-19 07:41:14,352 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 [2022-11-19 07:41:14,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:14,427 INFO L321 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2022-11-19 07:41:14,428 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 [2022-11-19 07:41:14,437 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 [2022-11-19 07:41:14,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:14,528 INFO L321 Elim1Store]: treesize reduction 72, result has 48.9 percent of original size [2022-11-19 07:41:14,529 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 [2022-11-19 07:41:14,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:41:14,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:41:14,554 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 [2022-11-19 07:41:14,565 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 [2022-11-19 07:41:14,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:41:14,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:41:14,599 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 [2022-11-19 07:41:14,610 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 [2022-11-19 07:41:14,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:14,783 INFO L321 Elim1Store]: treesize reduction 100, result has 29.1 percent of original size [2022-11-19 07:41:14,785 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 [2022-11-19 07:41:14,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:41:14,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:41:14,819 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 [2022-11-19 07:41:14,828 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 [2022-11-19 07:41:14,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:41:14,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:41:14,851 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 [2022-11-19 07:41:14,867 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 [2022-11-19 07:41:15,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:15,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:15,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:15,015 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 [2022-11-19 07:41:15,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:15,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:15,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:15,080 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 [2022-11-19 07:41:15,093 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 [2022-11-19 07:41:15,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-19 07:41:15,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:15,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:15,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:15,227 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 [2022-11-19 07:41:15,269 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 [2022-11-19 07:41:15,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:15,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:15,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:15,283 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 [2022-11-19 07:41:15,295 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 [2022-11-19 07:41:15,675 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 [2022-11-19 07:41:15,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:15,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:41:15,719 INFO L321 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2022-11-19 07:41:15,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 651 treesize of output 648 [2022-11-19 07:41:15,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:15,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:41:15,788 INFO L321 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2022-11-19 07:41:15,789 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 [2022-11-19 07:41:15,857 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 [2022-11-19 07:41:15,873 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 [2022-11-19 07:41:15,891 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 [2022-11-19 07:41:15,904 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 [2022-11-19 07:41:15,931 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:41:16,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:16,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:16,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:16,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:16,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:16,020 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 [2022-11-19 07:41:16,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:16,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:16,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:16,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:16,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:16,042 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:41:16,043 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 [2022-11-19 07:41:16,063 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 [2022-11-19 07:41:16,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:16,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:16,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:16,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:16,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:16,240 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 [2022-11-19 07:41:16,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:16,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:16,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:16,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:16,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:16,272 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:41:16,273 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 [2022-11-19 07:41:16,284 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 [2022-11-19 07:41:16,294 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 [2022-11-19 07:41:16,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:16,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:16,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:16,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:16,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:16,434 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 [2022-11-19 07:41:16,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:16,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:16,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:16,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:16,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:16,455 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:41:16,455 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 [2022-11-19 07:41:16,467 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 [2022-11-19 07:41:16,477 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 [2022-11-19 07:41:16,943 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-19 07:41:16,944 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 [2022-11-19 07:41:17,120 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 [2022-11-19 07:41:18,399 INFO L197 IcfgInterpreter]: Interpreting procedure chain_node with input of size 151 for LOIs [2022-11-19 07:41:18,774 INFO L197 IcfgInterpreter]: Interpreting procedure check_seq_next with input of size 164 for LOIs [2022-11-19 07:41:19,119 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 143 for LOIs [2022-11-19 07:41:19,201 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:41:31,370 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 [2022-11-19 07:41:31,371 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:41:31,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:41:31,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2022-11-19 07:41:31,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917779826] [2022-11-19 07:41:31,373 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:41:31,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 07:41:31,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:41:31,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 07:41:31,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1036, Unknown=29, NotChecked=134, Total=1332 [2022-11-19 07:41:31,376 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) [2022-11-19 07:41:31,899 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 [2022-11-19 07:41:32,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:41:32,765 INFO L93 Difference]: Finished difference Result 110 states and 140 transitions. [2022-11-19 07:41:32,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-19 07:41:32,766 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 [2022-11-19 07:41:32,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:41:32,769 INFO L225 Difference]: With dead ends: 110 [2022-11-19 07:41:32,769 INFO L226 Difference]: Without dead ends: 107 [2022-11-19 07:41:32,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=184, Invalid=1512, Unknown=38, NotChecked=246, Total=1980 [2022-11-19 07:41:32,771 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 128 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:41:32,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 412 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 650 Invalid, 0 Unknown, 320 Unchecked, 0.7s Time] [2022-11-19 07:41:32,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-19 07:41:32,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 97. [2022-11-19 07:41:32,796 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) [2022-11-19 07:41:32,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 123 transitions. [2022-11-19 07:41:32,803 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 123 transitions. Word has length 22 [2022-11-19 07:41:32,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:41:32,803 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 123 transitions. [2022-11-19 07:41:32,803 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) [2022-11-19 07:41:32,803 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 123 transitions. [2022-11-19 07:41:32,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 07:41:32,804 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:41:32,805 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] [2022-11-19 07:41:32,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 07:41:33,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:33,006 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:41:33,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:41:33,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1941316115, now seen corresponding path program 1 times [2022-11-19 07:41:33,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:41:33,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218003388] [2022-11-19 07:41:33,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:33,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:41:33,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:41:34,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:41:34,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:41:34,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218003388] [2022-11-19 07:41:34,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218003388] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:41:34,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771400413] [2022-11-19 07:41:34,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:34,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:34,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:41:34,692 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:41:34,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:41:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:41:34,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-19 07:41:34,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:41:34,911 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 [2022-11-19 07:41:34,972 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-19 07:41:34,972 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 [2022-11-19 07:41:34,979 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 [2022-11-19 07:41:34,986 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 [2022-11-19 07:41:35,006 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 [2022-11-19 07:41:35,010 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 [2022-11-19 07:41:35,143 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:41:35,143 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 [2022-11-19 07:41:35,247 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-19 07:41:35,247 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 [2022-11-19 07:41:35,265 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 [2022-11-19 07:41:35,330 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 [2022-11-19 07:41:35,352 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 [2022-11-19 07:41:35,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:35,414 INFO L321 Elim1Store]: treesize reduction 61, result has 37.1 percent of original size [2022-11-19 07:41:35,414 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 [2022-11-19 07:41:35,424 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 [2022-11-19 07:41:35,447 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 [2022-11-19 07:41:35,463 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 [2022-11-19 07:41:35,594 INFO L321 Elim1Store]: treesize reduction 73, result has 19.8 percent of original size [2022-11-19 07:41:35,595 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 [2022-11-19 07:41:35,603 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 [2022-11-19 07:41:35,653 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 [2022-11-19 07:41:35,929 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:41:35,930 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 [2022-11-19 07:41:35,939 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 [2022-11-19 07:41:36,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-19 07:41:36,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:41:36,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771400413] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:41:36,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1558178021] [2022-11-19 07:41:36,200 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-19 07:41:36,200 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:41:36,200 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:41:36,200 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:41:36,201 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:41:36,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:36,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:36,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:36,299 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-19 07:41:36,302 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 [2022-11-19 07:41:36,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:36,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:36,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:36,334 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 [2022-11-19 07:41:36,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:36,438 INFO L321 Elim1Store]: treesize reduction 100, result has 29.1 percent of original size [2022-11-19 07:41:36,439 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 [2022-11-19 07:41:36,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:41:36,511 INFO L321 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2022-11-19 07:41:36,512 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 [2022-11-19 07:41:36,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:36,521 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 [2022-11-19 07:41:36,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:36,538 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:41:36,539 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 [2022-11-19 07:41:36,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:36,632 INFO L321 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2022-11-19 07:41:36,633 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 [2022-11-19 07:41:36,643 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 [2022-11-19 07:41:36,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:36,725 INFO L321 Elim1Store]: treesize reduction 72, result has 48.9 percent of original size [2022-11-19 07:41:36,725 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 [2022-11-19 07:41:36,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:41:36,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:41:36,744 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 [2022-11-19 07:41:36,752 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 [2022-11-19 07:41:36,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:41:36,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:41:36,767 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 [2022-11-19 07:41:36,775 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 [2022-11-19 07:41:36,838 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 [2022-11-19 07:41:36,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:36,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:36,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:36,899 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 [2022-11-19 07:41:36,907 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 [2022-11-19 07:41:36,916 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 [2022-11-19 07:41:36,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:36,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:36,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:36,945 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 [2022-11-19 07:41:37,032 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 [2022-11-19 07:41:37,040 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 [2022-11-19 07:41:37,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:37,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:37,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:37,051 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 [2022-11-19 07:41:37,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:37,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:37,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:37,065 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 [2022-11-19 07:41:37,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:37,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:37,236 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:41:37,236 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 [2022-11-19 07:41:37,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:37,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:37,254 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 [2022-11-19 07:41:37,269 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 [2022-11-19 07:41:37,284 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 [2022-11-19 07:41:37,304 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 [2022-11-19 07:41:37,364 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 [2022-11-19 07:41:37,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:37,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:37,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:37,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:37,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:37,386 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:41:37,386 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 [2022-11-19 07:41:37,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:37,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:37,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:37,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:37,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:37,411 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 [2022-11-19 07:41:37,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:37,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:37,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:37,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:37,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:37,561 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:41:37,562 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 [2022-11-19 07:41:37,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:37,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:37,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:37,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:37,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:37,582 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 [2022-11-19 07:41:37,594 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 [2022-11-19 07:41:37,604 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 [2022-11-19 07:41:37,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:37,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:37,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:37,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:37,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:37,770 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:41:37,771 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 [2022-11-19 07:41:37,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:37,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:37,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:37,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:37,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:37,791 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 [2022-11-19 07:41:37,803 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 [2022-11-19 07:41:37,814 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 [2022-11-19 07:41:38,149 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-19 07:41:38,149 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 [2022-11-19 07:41:38,286 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 [2022-11-19 07:41:39,268 INFO L197 IcfgInterpreter]: Interpreting procedure chain_node with input of size 153 for LOIs [2022-11-19 07:41:39,572 INFO L197 IcfgInterpreter]: Interpreting procedure check_seq_next with input of size 136 for LOIs [2022-11-19 07:41:40,168 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 140 for LOIs [2022-11-19 07:41:40,317 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:41:52,092 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 [2022-11-19 07:41:52,093 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:41:52,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:41:52,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2022-11-19 07:41:52,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660965295] [2022-11-19 07:41:52,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:41:52,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-19 07:41:52,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:41:52,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-19 07:41:52,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1099, Unknown=12, NotChecked=68, Total=1332 [2022-11-19 07:41:52,096 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) [2022-11-19 07:41:53,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:41:53,173 INFO L93 Difference]: Finished difference Result 108 states and 134 transitions. [2022-11-19 07:41:53,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 07:41:53,174 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 [2022-11-19 07:41:53,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:41:53,175 INFO L225 Difference]: With dead ends: 108 [2022-11-19 07:41:53,175 INFO L226 Difference]: Without dead ends: 105 [2022-11-19 07:41:53,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=218, Invalid=1580, Unknown=12, NotChecked=82, Total=1892 [2022-11-19 07:41:53,177 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 133 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:41:53,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 354 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 605 Invalid, 0 Unknown, 132 Unchecked, 0.6s Time] [2022-11-19 07:41:53,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-19 07:41:53,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2022-11-19 07:41:53,190 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) [2022-11-19 07:41:53,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 125 transitions. [2022-11-19 07:41:53,191 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 125 transitions. Word has length 24 [2022-11-19 07:41:53,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:41:53,192 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 125 transitions. [2022-11-19 07:41:53,192 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) [2022-11-19 07:41:53,192 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 125 transitions. [2022-11-19 07:41:53,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-19 07:41:53,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:41:53,193 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] [2022-11-19 07:41:53,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:41:53,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:53,400 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:41:53,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:41:53,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1409252445, now seen corresponding path program 1 times [2022-11-19 07:41:53,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:41:53,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155422438] [2022-11-19 07:41:53,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:53,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:41:53,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:41:55,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:41:55,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:41:55,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155422438] [2022-11-19 07:41:55,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155422438] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:41:55,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129402504] [2022-11-19 07:41:55,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:55,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:55,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:41:55,012 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:41:55,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:41:55,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:41:55,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 125 conjunts are in the unsatisfiable core [2022-11-19 07:41:55,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:41:55,293 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 [2022-11-19 07:41:55,366 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-19 07:41:55,366 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 [2022-11-19 07:41:55,372 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 [2022-11-19 07:41:55,378 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 [2022-11-19 07:41:55,425 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2022-11-19 07:41:55,426 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 [2022-11-19 07:41:55,428 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 [2022-11-19 07:41:55,586 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 [2022-11-19 07:41:55,683 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 [2022-11-19 07:41:55,740 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 [2022-11-19 07:41:55,755 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 [2022-11-19 07:41:55,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:55,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:55,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:55,779 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 [2022-11-19 07:41:55,785 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 [2022-11-19 07:41:55,897 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 [2022-11-19 07:41:55,914 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 [2022-11-19 07:41:55,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:55,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:55,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:55,935 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 [2022-11-19 07:41:55,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:55,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:55,943 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 [2022-11-19 07:41:55,950 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 [2022-11-19 07:41:56,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:56,059 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 [2022-11-19 07:41:56,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2022-11-19 07:41:56,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:41:58,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129402504] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:41:58,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [903154725] [2022-11-19 07:41:58,628 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-19 07:41:58,628 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:41:58,629 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:41:58,629 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:41:58,629 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:41:58,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:58,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:58,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:58,723 INFO L321 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-11-19 07:41:58,723 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 [2022-11-19 07:41:58,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:58,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:58,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:58,816 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-19 07:41:58,817 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 [2022-11-19 07:41:58,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:58,934 INFO L321 Elim1Store]: treesize reduction 100, result has 29.1 percent of original size [2022-11-19 07:41:58,934 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 [2022-11-19 07:41:58,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:41:58,994 INFO L321 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2022-11-19 07:41:58,994 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 [2022-11-19 07:41:59,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:59,007 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 [2022-11-19 07:41:59,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:59,027 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:41:59,028 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 [2022-11-19 07:41:59,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:59,112 INFO L321 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2022-11-19 07:41:59,112 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 [2022-11-19 07:41:59,121 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 [2022-11-19 07:41:59,128 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 [2022-11-19 07:41:59,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:59,218 INFO L321 Elim1Store]: treesize reduction 72, result has 48.9 percent of original size [2022-11-19 07:41:59,218 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 [2022-11-19 07:41:59,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:41:59,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:41:59,246 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 [2022-11-19 07:41:59,254 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 [2022-11-19 07:41:59,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:41:59,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:41:59,269 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 [2022-11-19 07:41:59,278 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 [2022-11-19 07:41:59,390 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 [2022-11-19 07:41:59,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:59,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:59,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:59,421 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 [2022-11-19 07:41:59,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:59,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:59,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:59,436 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 [2022-11-19 07:41:59,448 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 [2022-11-19 07:41:59,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:59,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:59,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:59,556 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 [2022-11-19 07:41:59,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:59,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:59,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:59,589 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 [2022-11-19 07:41:59,599 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 [2022-11-19 07:41:59,608 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 [2022-11-19 07:41:59,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:59,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:59,734 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 [2022-11-19 07:41:59,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:59,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:59,755 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:41:59,755 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 [2022-11-19 07:41:59,770 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 [2022-11-19 07:41:59,780 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 [2022-11-19 07:41:59,797 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 [2022-11-19 07:41:59,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 07:41:59,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:59,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:59,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:59,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:59,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:59,873 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 [2022-11-19 07:41:59,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:59,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:59,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:59,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:59,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:59,895 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:41:59,896 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 [2022-11-19 07:42:00,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:00,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:00,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:00,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:00,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:00,038 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 [2022-11-19 07:42:00,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:00,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:00,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:00,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:00,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:00,061 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:42:00,061 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 [2022-11-19 07:42:00,074 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 [2022-11-19 07:42:00,084 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 [2022-11-19 07:42:00,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:00,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:00,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:00,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:00,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:00,208 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:42:00,208 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 [2022-11-19 07:42:00,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:00,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:00,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:00,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:00,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:00,227 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 [2022-11-19 07:42:00,238 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 [2022-11-19 07:42:00,248 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 [2022-11-19 07:42:00,844 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 [2022-11-19 07:42:00,909 INFO L197 IcfgInterpreter]: Interpreting procedure chain_node with input of size 12 for LOIs [2022-11-19 07:42:00,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:42:00,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:00,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:42:00,949 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 07:42:00,950 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 [2022-11-19 07:42:00,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:42:00,976 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 [2022-11-19 07:42:00,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:00,983 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 [2022-11-19 07:42:00,989 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 [2022-11-19 07:42:01,001 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 [2022-11-19 07:42:01,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:42:01,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:01,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:42:01,038 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2022-11-19 07:42:01,039 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 [2022-11-19 07:42:01,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:42:01,071 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 [2022-11-19 07:42:01,079 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 [2022-11-19 07:42:01,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:01,088 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 [2022-11-19 07:42:01,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:01,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:42:01,134 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-19 07:42:01,135 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 [2022-11-19 07:42:01,143 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 [2022-11-19 07:42:01,146 INFO L197 IcfgInterpreter]: Interpreting procedure check_seq_next with input of size 41 for LOIs [2022-11-19 07:42:01,178 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 27 for LOIs [2022-11-19 07:42:01,186 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:42:04,530 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 [2022-11-19 07:42:04,530 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:42:04,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:42:04,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2022-11-19 07:42:04,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273421702] [2022-11-19 07:42:04,531 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:42:04,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-19 07:42:04,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:42:04,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-19 07:42:04,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1196, Unknown=8, NotChecked=142, Total=1482 [2022-11-19 07:42:04,533 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) [2022-11-19 07:42:06,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:42:06,221 INFO L93 Difference]: Finished difference Result 157 states and 199 transitions. [2022-11-19 07:42:06,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-19 07:42:06,222 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 [2022-11-19 07:42:06,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:42:06,223 INFO L225 Difference]: With dead ends: 157 [2022-11-19 07:42:06,223 INFO L226 Difference]: Without dead ends: 154 [2022-11-19 07:42:06,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=189, Invalid=1791, Unknown=8, NotChecked=174, Total=2162 [2022-11-19 07:42:06,225 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 149 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 1105 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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 [2022-11-19 07:42:06,225 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] [2022-11-19 07:42:06,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-19 07:42:06,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2022-11-19 07:42:06,241 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) [2022-11-19 07:42:06,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 150 transitions. [2022-11-19 07:42:06,242 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 150 transitions. Word has length 27 [2022-11-19 07:42:06,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:42:06,243 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 150 transitions. [2022-11-19 07:42:06,243 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) [2022-11-19 07:42:06,243 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 150 transitions. [2022-11-19 07:42:06,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-19 07:42:06,244 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:42:06,244 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] [2022-11-19 07:42:06,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:42:06,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:42:06,454 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:42:06,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:42:06,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1814393797, now seen corresponding path program 1 times [2022-11-19 07:42:06,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:42:06,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066772987] [2022-11-19 07:42:06,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:42:06,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:42:06,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:42:07,577 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:42:07,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:42:07,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066772987] [2022-11-19 07:42:07,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066772987] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:42:07,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665485107] [2022-11-19 07:42:07,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:42:07,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:42:07,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:42:07,579 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:42:07,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:42:07,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:42:07,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-19 07:42:07,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:42:07,857 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 [2022-11-19 07:42:08,009 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-19 07:42:08,009 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 [2022-11-19 07:42:08,015 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 [2022-11-19 07:42:08,023 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 [2022-11-19 07:42:08,060 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2022-11-19 07:42:08,061 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 [2022-11-19 07:42:08,063 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 [2022-11-19 07:42:08,169 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 [2022-11-19 07:42:08,216 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 [2022-11-19 07:42:08,227 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 [2022-11-19 07:42:08,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:08,252 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:42:08,252 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 [2022-11-19 07:42:08,258 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 [2022-11-19 07:42:08,300 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 [2022-11-19 07:42:08,307 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-11-19 07:42:08,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:42:08,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665485107] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:42:08,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [580106680] [2022-11-19 07:42:08,449 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-19 07:42:08,449 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:42:08,449 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:42:08,450 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:42:08,450 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:42:08,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:08,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:08,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:08,574 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-19 07:42:08,574 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 [2022-11-19 07:42:08,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:08,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:08,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:08,599 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 [2022-11-19 07:42:08,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:08,706 INFO L321 Elim1Store]: treesize reduction 100, result has 29.1 percent of original size [2022-11-19 07:42:08,706 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 [2022-11-19 07:42:08,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:42:08,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:42:08,723 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 [2022-11-19 07:42:08,730 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 [2022-11-19 07:42:08,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:42:08,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:42:08,746 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 [2022-11-19 07:42:08,753 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 [2022-11-19 07:42:08,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:08,867 INFO L321 Elim1Store]: treesize reduction 72, result has 48.9 percent of original size [2022-11-19 07:42:08,867 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 [2022-11-19 07:42:08,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:42:08,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:42:08,887 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 [2022-11-19 07:42:08,896 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 [2022-11-19 07:42:08,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:42:08,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:42:08,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 23 [2022-11-19 07:42:08,927 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 [2022-11-19 07:42:09,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:09,049 INFO L321 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2022-11-19 07:42:09,050 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 [2022-11-19 07:42:09,060 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 [2022-11-19 07:42:09,069 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 [2022-11-19 07:42:09,146 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 [2022-11-19 07:42:09,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:09,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:09,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:09,159 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 [2022-11-19 07:42:09,190 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 [2022-11-19 07:42:09,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:09,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:09,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:09,208 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 [2022-11-19 07:42:09,285 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 [2022-11-19 07:42:09,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:09,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:09,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:09,322 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 [2022-11-19 07:42:09,334 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 [2022-11-19 07:42:09,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:09,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:09,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:09,348 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 [2022-11-19 07:42:09,575 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 [2022-11-19 07:42:09,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:09,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:42:09,611 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:42:09,611 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 [2022-11-19 07:42:09,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:42:09,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:42:09,691 INFO L321 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2022-11-19 07:42:09,692 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 [2022-11-19 07:42:09,738 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 [2022-11-19 07:42:09,752 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 [2022-11-19 07:42:09,769 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 [2022-11-19 07:42:09,783 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 [2022-11-19 07:42:10,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:10,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:10,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:42:10,466 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 07:42:10,466 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 [2022-11-19 07:42:10,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:10,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:10,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:42:10,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:42:10,490 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-19 07:42:10,492 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 [2022-11-19 07:42:10,519 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 [2022-11-19 07:42:10,529 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 [2022-11-19 07:42:11,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:11,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:11,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:42:11,158 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 07:42:11,159 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 [2022-11-19 07:42:11,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:11,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:11,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:42:11,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:42:11,187 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-19 07:42:11,187 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 [2022-11-19 07:42:11,207 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 [2022-11-19 07:42:11,219 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 [2022-11-19 07:42:11,762 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 [2022-11-19 07:42:11,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:42:11,782 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:42:11,782 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 [2022-11-19 07:42:11,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:42:11,803 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:42:11,804 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 [2022-11-19 07:42:11,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:42:11,869 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 07:42:11,869 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 [2022-11-19 07:42:11,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:42:11,880 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 07:42:11,880 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 [2022-11-19 07:42:11,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:42:12,003 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 07:42:12,003 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 [2022-11-19 07:42:12,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:42:12,021 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 07:42:12,022 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 [2022-11-19 07:42:12,221 INFO L321 Elim1Store]: treesize reduction 18, result has 62.5 percent of original size [2022-11-19 07:42:12,221 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 [2022-11-19 07:42:12,600 INFO L197 IcfgInterpreter]: Interpreting procedure chain_node with input of size 12 for LOIs [2022-11-19 07:42:12,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:42:12,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:12,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:42:12,662 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 07:42:12,662 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 [2022-11-19 07:42:12,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:42:12,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:42:12,692 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 [2022-11-19 07:42:12,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:12,699 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 [2022-11-19 07:42:12,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:12,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:42:12,739 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-19 07:42:12,739 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 [2022-11-19 07:42:12,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:42:12,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:12,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:42:12,781 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2022-11-19 07:42:12,781 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 [2022-11-19 07:42:12,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:42:12,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:42:12,795 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 [2022-11-19 07:42:12,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:12,804 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 [2022-11-19 07:42:12,824 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 [2022-11-19 07:42:12,832 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 [2022-11-19 07:42:12,835 INFO L197 IcfgInterpreter]: Interpreting procedure check_seq_next with input of size 114 for LOIs [2022-11-19 07:42:12,966 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 100 for LOIs [2022-11-19 07:42:13,000 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:42:19,611 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 [2022-11-19 07:42:19,611 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:42:19,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:42:19,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2022-11-19 07:42:19,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007255602] [2022-11-19 07:42:19,612 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:42:19,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 07:42:19,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:42:19,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 07:42:19,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1000, Unknown=26, NotChecked=64, Total=1190 [2022-11-19 07:42:19,613 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) [2022-11-19 07:42:20,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:42:20,890 INFO L93 Difference]: Finished difference Result 172 states and 219 transitions. [2022-11-19 07:42:20,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:42:20,891 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 [2022-11-19 07:42:20,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:42:20,892 INFO L225 Difference]: With dead ends: 172 [2022-11-19 07:42:20,892 INFO L226 Difference]: Without dead ends: 169 [2022-11-19 07:42:20,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=137, Invalid=1400, Unknown=27, NotChecked=76, Total=1640 [2022-11-19 07:42:20,894 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 [2022-11-19 07:42:20,894 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] [2022-11-19 07:42:20,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-19 07:42:20,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 119. [2022-11-19 07:42:20,909 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) [2022-11-19 07:42:20,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 150 transitions. [2022-11-19 07:42:20,910 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 150 transitions. Word has length 27 [2022-11-19 07:42:20,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:42:20,910 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 150 transitions. [2022-11-19 07:42:20,911 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) [2022-11-19 07:42:20,911 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 150 transitions. [2022-11-19 07:42:20,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 07:42:20,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:42:20,912 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] [2022-11-19 07:42:20,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:42:21,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:42:21,119 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:42:21,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:42:21,119 INFO L85 PathProgramCache]: Analyzing trace with hash 128159807, now seen corresponding path program 1 times [2022-11-19 07:42:21,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:42:21,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659138917] [2022-11-19 07:42:21,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:42:21,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:42:21,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 07:42:21,214 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 07:42:21,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 07:42:21,316 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-19 07:42:21,319 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-19 07:42:21,320 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location failErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-19 07:42:21,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:42:21,327 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-19 07:42:21,332 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 07:42:21,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 07:42:21 BoogieIcfgContainer [2022-11-19 07:42:21,381 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 07:42:21,382 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 07:42:21,382 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 07:42:21,382 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 07:42:21,383 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:41:08" (3/4) ... [2022-11-19 07:42:21,385 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-19 07:42:21,436 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/bin/utaipan-I9t0OCRTmS/witness.graphml [2022-11-19 07:42:21,436 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 07:42:21,437 INFO L158 Benchmark]: Toolchain (without parser) took 74744.62ms. Allocated memory was 136.3MB in the beginning and 453.0MB in the end (delta: 316.7MB). Free memory was 98.7MB in the beginning and 368.1MB in the end (delta: -269.4MB). Peak memory consumption was 47.1MB. Max. memory is 16.1GB. [2022-11-19 07:42:21,437 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 136.3MB. Free memory was 106.8MB in the beginning and 106.8MB in the end (delta: 25.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:42:21,437 INFO L158 Benchmark]: CACSL2BoogieTranslator took 551.80ms. Allocated memory is still 136.3MB. Free memory was 98.5MB in the beginning and 103.6MB in the end (delta: -5.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-19 07:42:21,441 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.03ms. Allocated memory is still 136.3MB. Free memory was 103.6MB in the beginning and 100.9MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 07:42:21,442 INFO L158 Benchmark]: Boogie Preprocessor took 38.02ms. Allocated memory is still 136.3MB. Free memory was 100.9MB in the beginning and 98.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 07:42:21,446 INFO L158 Benchmark]: RCFGBuilder took 873.07ms. Allocated memory is still 136.3MB. Free memory was 98.2MB in the beginning and 68.6MB in the end (delta: 29.6MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2022-11-19 07:42:21,447 INFO L158 Benchmark]: TraceAbstraction took 73173.38ms. Allocated memory was 136.3MB in the beginning and 453.0MB in the end (delta: 316.7MB). Free memory was 67.9MB in the beginning and 371.3MB in the end (delta: -303.3MB). Peak memory consumption was 14.0MB. Max. memory is 16.1GB. [2022-11-19 07:42:21,448 INFO L158 Benchmark]: Witness Printer took 54.38ms. Allocated memory is still 453.0MB. Free memory was 371.3MB in the beginning and 368.1MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-19 07:42:21,449 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 136.3MB. Free memory was 106.8MB in the beginning and 106.8MB in the end (delta: 25.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 551.80ms. Allocated memory is still 136.3MB. Free memory was 98.5MB in the beginning and 103.6MB in the end (delta: -5.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.03ms. Allocated memory is still 136.3MB. Free memory was 103.6MB in the beginning and 100.9MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.02ms. Allocated memory is still 136.3MB. Free memory was 100.9MB in the beginning and 98.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 873.07ms. Allocated memory is still 136.3MB. Free memory was 98.2MB in the beginning and 68.6MB in the end (delta: 29.6MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * TraceAbstraction took 73173.38ms. Allocated memory was 136.3MB in the beginning and 453.0MB in the end (delta: 316.7MB). Free memory was 67.9MB in the beginning and 371.3MB in the end (delta: -303.3MB). Peak memory consumption was 14.0MB. Max. memory is 16.1GB. * Witness Printer took 54.38ms. Allocated memory is still 453.0MB. Free memory was 371.3MB in the beginning and 368.1MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 565]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L639] const struct node *p1, *p2; [L640] CALL, EXPR create_sll(&p1, &p2) [L588] struct node *list = ((void *)0); VAL [list={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={0:0}, beg={-1:0}, 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: 73.0s, OverallIterations: 6, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 5.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 525 SdHoareTripleChecker+Valid, 3.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 515 mSDsluCounter, 1885 SdHoareTripleChecker+Invalid, 3.0s 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, 1684 ImplicationChecksByTransitivity, 40.0s 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, 0.8s SatisfiabilityAnalysisTime, 14.1s 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! [2022-11-19 07:42:21,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b62d6-da4f-4b10-812d-a4c98bdf1eb3/bin/utaipan-I9t0OCRTmS/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