./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/sll-reverse_simple.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/forester-heap/sll-reverse_simple.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a7651578256dc791e0a036690d99e12094845a58f582fb99f9abee48c7c5dfba --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 10:27:22,311 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:27:22,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:27:22,333 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:27:22,334 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:27:22,335 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:27:22,336 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:27:22,338 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:27:22,339 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:27:22,340 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:27:22,341 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:27:22,342 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:27:22,342 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:27:22,343 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:27:22,344 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:27:22,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:27:22,346 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:27:22,347 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:27:22,348 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:27:22,350 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:27:22,352 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:27:22,353 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:27:22,354 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:27:22,355 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:27:22,358 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:27:22,358 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:27:22,359 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:27:22,360 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:27:22,360 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:27:22,361 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:27:22,361 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:27:22,362 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:27:22,363 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:27:22,363 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:27:22,364 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:27:22,364 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:27:22,365 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:27:22,365 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:27:22,365 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:27:22,366 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:27:22,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:27:22,367 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 10:27:22,387 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:27:22,387 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:27:22,388 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:27:22,388 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:27:22,388 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:27:22,388 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:27:22,389 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:27:22,389 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:27:22,389 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:27:22,389 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 10:27:22,389 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:27:22,389 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:27:22,390 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 10:27:22,390 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 10:27:22,390 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:27:22,390 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 10:27:22,390 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 10:27:22,390 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 10:27:22,391 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:27:22,391 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 10:27:22,391 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 10:27:22,392 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 10:27:22,392 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:27:22,392 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 10:27:22,392 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:27:22,392 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 10:27:22,392 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 10:27:22,392 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 10:27:22,393 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:27:22,393 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 10:27:22,393 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:27:22,393 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:27:22,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:27:22,394 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:27:22,394 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 10:27:22,394 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:27:22,394 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 10:27:22,394 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 10:27:22,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 10:27:22,395 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 10:27:22,395 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:27:22,395 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_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a7651578256dc791e0a036690d99e12094845a58f582fb99f9abee48c7c5dfba [2022-12-14 10:27:22,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:27:22,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:27:22,610 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:27:22,611 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:27:22,611 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:27:22,612 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/forester-heap/sll-reverse_simple.i [2022-12-14 10:27:25,232 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:27:25,413 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:27:25,414 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/sv-benchmarks/c/forester-heap/sll-reverse_simple.i [2022-12-14 10:27:25,423 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/bin/utaipan-gh47qXpMRh/data/d2efdd117/10fd9ec358b6443892d4b73b7240b2ae/FLAG190afca62 [2022-12-14 10:27:25,433 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/bin/utaipan-gh47qXpMRh/data/d2efdd117/10fd9ec358b6443892d4b73b7240b2ae [2022-12-14 10:27:25,435 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:27:25,436 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:27:25,437 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:27:25,437 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:27:25,440 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:27:25,440 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:27:25" (1/1) ... [2022-12-14 10:27:25,441 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f064dbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:27:25, skipping insertion in model container [2022-12-14 10:27:25,441 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:27:25" (1/1) ... [2022-12-14 10:27:25,446 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:27:25,471 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:27:25,676 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/sv-benchmarks/c/forester-heap/sll-reverse_simple.i[22251,22264] [2022-12-14 10:27:25,680 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/sv-benchmarks/c/forester-heap/sll-reverse_simple.i[22336,22349] [2022-12-14 10:27:25,685 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/sv-benchmarks/c/forester-heap/sll-reverse_simple.i[22829,22842] [2022-12-14 10:27:25,689 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:27:25,698 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 10:27:25,723 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/sv-benchmarks/c/forester-heap/sll-reverse_simple.i[22251,22264] [2022-12-14 10:27:25,725 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/sv-benchmarks/c/forester-heap/sll-reverse_simple.i[22336,22349] [2022-12-14 10:27:25,729 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/sv-benchmarks/c/forester-heap/sll-reverse_simple.i[22829,22842] [2022-12-14 10:27:25,731 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:27:25,754 INFO L208 MainTranslator]: Completed translation [2022-12-14 10:27:25,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:27:25 WrapperNode [2022-12-14 10:27:25,754 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:27:25,755 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 10:27:25,755 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 10:27:25,755 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 10:27:25,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:27:25" (1/1) ... [2022-12-14 10:27:25,774 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:27:25" (1/1) ... [2022-12-14 10:27:25,793 INFO L138 Inliner]: procedures = 119, calls = 35, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 136 [2022-12-14 10:27:25,793 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 10:27:25,794 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 10:27:25,794 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 10:27:25,794 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 10:27:25,803 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:27:25" (1/1) ... [2022-12-14 10:27:25,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:27:25" (1/1) ... [2022-12-14 10:27:25,807 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:27:25" (1/1) ... [2022-12-14 10:27:25,807 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:27:25" (1/1) ... [2022-12-14 10:27:25,815 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:27:25" (1/1) ... [2022-12-14 10:27:25,819 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:27:25" (1/1) ... [2022-12-14 10:27:25,821 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:27:25" (1/1) ... [2022-12-14 10:27:25,822 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:27:25" (1/1) ... [2022-12-14 10:27:25,824 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 10:27:25,825 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 10:27:25,825 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 10:27:25,826 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 10:27:25,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:27:25" (1/1) ... [2022-12-14 10:27:25,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:27:25,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:27:25,853 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 10:27:25,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 10:27:25,882 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 10:27:25,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 10:27:25,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 10:27:25,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 10:27:25,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 10:27:25,882 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 10:27:25,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 10:27:25,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 10:27:25,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 10:27:25,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 10:27:25,975 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 10:27:25,977 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 10:27:26,172 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 10:27:26,238 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 10:27:26,238 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-12-14 10:27:26,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:27:26 BoogieIcfgContainer [2022-12-14 10:27:26,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 10:27:26,244 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 10:27:26,244 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 10:27:26,246 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 10:27:26,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:27:25" (1/3) ... [2022-12-14 10:27:26,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ba24f38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:27:26, skipping insertion in model container [2022-12-14 10:27:26,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:27:25" (2/3) ... [2022-12-14 10:27:26,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ba24f38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:27:26, skipping insertion in model container [2022-12-14 10:27:26,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:27:26" (3/3) ... [2022-12-14 10:27:26,249 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-reverse_simple.i [2022-12-14 10:27:26,264 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 10:27:26,265 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-12-14 10:27:26,305 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:27:26,310 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;@7b2c03e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:27:26,311 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-14 10:27:26,314 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:27:26,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 10:27:26,320 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:27:26,320 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 10:27:26,320 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:27:26,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:27:26,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1014884411, now seen corresponding path program 1 times [2022-12-14 10:27:26,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:27:26,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895793995] [2022-12-14 10:27:26,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:27:26,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:27:26,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:27:26,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:27:26,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:27:26,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895793995] [2022-12-14 10:27:26,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895793995] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:27:26,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:27:26,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 10:27:26,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982360897] [2022-12-14 10:27:26,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:27:26,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 10:27:26,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:27:26,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 10:27:26,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 10:27:26,502 INFO L87 Difference]: Start difference. First operand has 25 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:27:26,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:27:26,578 INFO L93 Difference]: Finished difference Result 47 states and 75 transitions. [2022-12-14 10:27:26,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 10:27:26,580 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 10:27:26,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:27:26,588 INFO L225 Difference]: With dead ends: 47 [2022-12-14 10:27:26,588 INFO L226 Difference]: Without dead ends: 23 [2022-12-14 10:27:26,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 10:27:26,594 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:27:26,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:27:26,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-12-14 10:27:26,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-12-14 10:27:26,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:27:26,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-12-14 10:27:26,628 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 6 [2022-12-14 10:27:26,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:27:26,628 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-12-14 10:27:26,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:27:26,629 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-12-14 10:27:26,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 10:27:26,629 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:27:26,629 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:27:26,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 10:27:26,630 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:27:26,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:27:26,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1773939347, now seen corresponding path program 1 times [2022-12-14 10:27:26,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:27:26,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383822788] [2022-12-14 10:27:26,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:27:26,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:27:26,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:27:26,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:27:26,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:27:26,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383822788] [2022-12-14 10:27:26,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383822788] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:27:26,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:27:26,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:27:26,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785018415] [2022-12-14 10:27:26,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:27:26,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:27:26,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:27:26,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:27:26,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:27:26,865 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:27:27,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:27:27,125 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2022-12-14 10:27:27,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:27:27,126 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 10:27:27,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:27:27,126 INFO L225 Difference]: With dead ends: 52 [2022-12-14 10:27:27,127 INFO L226 Difference]: Without dead ends: 33 [2022-12-14 10:27:27,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:27:27,128 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 17 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:27:27,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 55 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:27:27,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-12-14 10:27:27,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2022-12-14 10:27:27,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 25 states have (on average 1.28) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:27:27,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-12-14 10:27:27,133 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 8 [2022-12-14 10:27:27,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:27:27,134 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-12-14 10:27:27,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:27:27,134 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-12-14 10:27:27,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 10:27:27,134 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:27:27,134 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:27:27,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 10:27:27,135 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:27:27,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:27:27,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1773940597, now seen corresponding path program 1 times [2022-12-14 10:27:27,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:27:27,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029626258] [2022-12-14 10:27:27,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:27:27,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:27:27,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:27:27,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:27:27,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:27:27,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029626258] [2022-12-14 10:27:27,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029626258] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:27:27,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:27:27,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:27:27,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538576562] [2022-12-14 10:27:27,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:27:27,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:27:27,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:27:27,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:27:27,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:27:27,177 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:27:27,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:27:27,263 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2022-12-14 10:27:27,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 10:27:27,264 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 10:27:27,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:27:27,264 INFO L225 Difference]: With dead ends: 47 [2022-12-14 10:27:27,265 INFO L226 Difference]: Without dead ends: 37 [2022-12-14 10:27:27,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:27:27,266 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 33 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:27:27,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 28 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:27:27,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-12-14 10:27:27,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2022-12-14 10:27:27,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:27:27,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-12-14 10:27:27,273 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 8 [2022-12-14 10:27:27,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:27:27,273 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-12-14 10:27:27,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:27:27,273 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-12-14 10:27:27,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 10:27:27,274 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:27:27,274 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:27:27,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 10:27:27,275 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:27:27,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:27:27,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1936633858, now seen corresponding path program 1 times [2022-12-14 10:27:27,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:27:27,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929773751] [2022-12-14 10:27:27,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:27:27,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:27:27,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:27:27,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:27:27,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:27:27,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929773751] [2022-12-14 10:27:27,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929773751] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:27:27,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212056290] [2022-12-14 10:27:27,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:27:27,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:27:27,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:27:27,668 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:27:27,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 10:27:27,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:27:27,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-14 10:27:27,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:27:27,812 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 [2022-12-14 10:27:27,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:27,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-12-14 10:27:27,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:27,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-12-14 10:27:28,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 10:27:28,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:28,019 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-12-14 10:27:28,032 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 10:27:28,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-12-14 10:27:28,041 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-12-14 10:27:28,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 10:27:28,065 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 24 treesize of output 12 [2022-12-14 10:27:28,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:27:28,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:27:28,218 INFO L321 Elim1Store]: treesize reduction 14, result has 69.6 percent of original size [2022-12-14 10:27:28,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 212 treesize of output 258 [2022-12-14 10:27:28,327 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 37 treesize of output 35 [2022-12-14 10:27:28,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:27:28,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212056290] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:27:28,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1253092562] [2022-12-14 10:27:28,659 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 10:27:28,659 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:27:28,662 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:27:28,666 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:27:28,666 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:27:28,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:28,703 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 0 case distinctions, treesize of input 22 treesize of output 7 [2022-12-14 10:27:28,726 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-14 10:27:28,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2022-12-14 10:27:28,757 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 10:27:28,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-12-14 10:27:28,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:28,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-12-14 10:27:28,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:28,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:28,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 37 [2022-12-14 10:27:28,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:28,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:28,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:28,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:28,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 362 treesize of output 384 [2022-12-14 10:27:28,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:28,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:28,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:27:29,271 INFO L321 Elim1Store]: treesize reduction 162, result has 13.8 percent of original size [2022-12-14 10:27:29,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 355 treesize of output 321 [2022-12-14 10:27:29,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:29,375 INFO L321 Elim1Store]: treesize reduction 182, result has 8.5 percent of original size [2022-12-14 10:27:29,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 350 treesize of output 344 [2022-12-14 10:27:29,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:29,452 INFO L321 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2022-12-14 10:27:29,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 61 [2022-12-14 10:27:29,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:29,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 10:27:29,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:29,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:29,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:29,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:29,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 62 [2022-12-14 10:27:29,527 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 47 treesize of output 3 [2022-12-14 10:27:29,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 10:27:29,720 INFO L321 Elim1Store]: treesize reduction 107, result has 25.2 percent of original size [2022-12-14 10:27:29,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 16687 treesize of output 15080 [2022-12-14 10:27:30,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:30,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:30,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:30,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:30,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:30,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:30,260 INFO L321 Elim1Store]: treesize reduction 236, result has 10.3 percent of original size [2022-12-14 10:27:30,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 9314 treesize of output 9305 [2022-12-14 10:27:30,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:30,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:27:30,580 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-14 10:27:30,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 45 [2022-12-14 10:27:35,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:35,959 INFO L321 Elim1Store]: treesize reduction 29, result has 45.3 percent of original size [2022-12-14 10:27:35,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 2498 treesize of output 2432 [2022-12-14 10:27:35,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:35,995 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 2346 treesize of output 2168 [2022-12-14 10:27:36,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:36,604 INFO L321 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2022-12-14 10:27:36,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 2498 treesize of output 2409 [2022-12-14 10:27:36,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:36,630 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 2334 treesize of output 2158 [2022-12-14 10:27:36,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:36,930 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-12-14 10:27:36,930 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 4 new quantified variables, introduced 2 case distinctions, treesize of input 2498 treesize of output 2233 [2022-12-14 10:27:37,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:37,435 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 209 treesize of output 165 [2022-12-14 10:27:37,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:37,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:37,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:27:37,493 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 195 treesize of output 155 [2022-12-14 10:27:37,508 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 57 [2022-12-14 10:27:37,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:27:37,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:37,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:37,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:27:37,610 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-12-14 10:27:37,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 973 treesize of output 959 [2022-12-14 10:27:37,885 INFO L321 Elim1Store]: treesize reduction 181, result has 32.2 percent of original size [2022-12-14 10:27:37,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 33674 treesize of output 30273 [2022-12-14 10:27:38,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:27:38,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:27:38,658 INFO L321 Elim1Store]: treesize reduction 721, result has 9.9 percent of original size [2022-12-14 10:27:38,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 42 case distinctions, treesize of input 25832 treesize of output 25829 [2022-12-14 10:27:52,320 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 10:27:52,347 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 10:27:52,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:52,428 INFO L321 Elim1Store]: treesize reduction 29, result has 45.3 percent of original size [2022-12-14 10:27:52,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 2465 treesize of output 2325 [2022-12-14 10:27:52,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:52,455 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 2177 treesize of output 2063 [2022-12-14 10:27:52,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:52,915 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-12-14 10:27:52,915 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 4 new quantified variables, introduced 2 case distinctions, treesize of input 2465 treesize of output 2190 [2022-12-14 10:27:53,367 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 461 treesize of output 455 [2022-12-14 10:27:53,452 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 461 treesize of output 429 [2022-12-14 10:27:53,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:27:53,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 349 treesize of output 357 [2022-12-14 10:27:53,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 3 [2022-12-14 10:27:53,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:27:53,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:27:53,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:27:53,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:53,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 349 treesize of output 338 [2022-12-14 10:27:53,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:27:53,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:27:53,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2022-12-14 10:27:53,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 10:27:53,787 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 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 10:27:53,791 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 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 10:27:53,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 10:27:53,805 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 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 10:27:53,809 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 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 10:27:53,819 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:27:54,213 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '439#(and (= |ULTIMATE.start_main_~head~0#1.offset| |ULTIMATE.start_main_~x~0#1.offset|) (= 2 |ULTIMATE.start_main_~t1~0#1|) (= |ULTIMATE.start_main_~t1~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~x~0#1.base|) (+ |ULTIMATE.start_main_~x~0#1.offset| 4))) (= |ULTIMATE.start_main_~x~0#1.base| |ULTIMATE.start_main_~head~0#1.base|) (= |ULTIMATE.start_main_~t2~0#1| (select (select |#memory_int| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|)) (+ (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|) 4))) (= |ULTIMATE.start_main_~head~0#1.offset| |ULTIMATE.start_main_~prev~0#1.offset|) (= |ULTIMATE.start_main_~prev~0#1.base| |ULTIMATE.start_main_~head~0#1.base|) (= |#NULL.offset| 0) (not (= |ULTIMATE.start_main_~t2~0#1| 1)) (or (not (= |ULTIMATE.start_main_~x~0#1.base| 0)) (not (= |ULTIMATE.start_main_~x~0#1.offset| 0))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:27:54,213 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:27:54,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:27:54,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-14 10:27:54,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304317567] [2022-12-14 10:27:54,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:27:54,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 10:27:54,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:27:54,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 10:27:54,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-12-14 10:27:54,215 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:27:55,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:27:55,242 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2022-12-14 10:27:55,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 10:27:55,243 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 10:27:55,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:27:55,244 INFO L225 Difference]: With dead ends: 68 [2022-12-14 10:27:55,244 INFO L226 Difference]: Without dead ends: 62 [2022-12-14 10:27:55,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2022-12-14 10:27:55,245 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 38 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 10:27:55,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 124 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 118 Invalid, 1 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 10:27:55,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-12-14 10:27:55,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2022-12-14 10:27:55,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 41 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:27:55,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2022-12-14 10:27:55,250 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 14 [2022-12-14 10:27:55,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:27:55,251 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2022-12-14 10:27:55,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:27:55,251 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2022-12-14 10:27:55,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 10:27:55,251 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:27:55,251 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:27:55,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 10:27:55,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:27:55,453 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:27:55,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:27:55,455 INFO L85 PathProgramCache]: Analyzing trace with hash 22111694, now seen corresponding path program 2 times [2022-12-14 10:27:55,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:27:55,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594131001] [2022-12-14 10:27:55,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:27:55,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:27:55,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:27:56,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:27:56,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:27:56,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594131001] [2022-12-14 10:27:56,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594131001] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:27:56,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997202674] [2022-12-14 10:27:56,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:27:56,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:27:56,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:27:56,061 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:27:56,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 10:27:56,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 10:27:56,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:27:56,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 76 conjunts are in the unsatisfiable core [2022-12-14 10:27:56,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:27:56,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:56,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-12-14 10:27:56,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:56,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-12-14 10:27:56,261 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 [2022-12-14 10:27:56,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:56,374 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-12-14 10:27:56,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:56,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 27 [2022-12-14 10:27:56,388 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 10:27:56,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-12-14 10:27:56,394 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-12-14 10:27:56,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 10:27:56,399 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 20 treesize of output 22 [2022-12-14 10:27:56,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 10:27:56,428 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 24 treesize of output 12 [2022-12-14 10:27:56,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:56,434 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 21 treesize of output 20 [2022-12-14 10:27:56,457 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 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 10:27:56,461 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 18 treesize of output 20 [2022-12-14 10:27:56,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 10:27:56,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 38 [2022-12-14 10:27:56,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 34 treesize of output 26 [2022-12-14 10:27:56,524 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 28 treesize of output 20 [2022-12-14 10:27:56,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:27:56,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:27:56,563 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_328 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_328) |c_ULTIMATE.start_main_~prev~0#1.base|) (+ |c_ULTIMATE.start_main_~prev~0#1.offset| 4)) 1)) is different from false [2022-12-14 10:27:56,570 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_324 Int) (v_ArrVal_328 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset| v_ArrVal_324)) (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_328) |c_ULTIMATE.start_main_~x~0#1.base|) (+ |c_ULTIMATE.start_main_~x~0#1.offset| 4)) 1)) is different from false [2022-12-14 10:27:56,687 INFO L321 Elim1Store]: treesize reduction 14, result has 74.1 percent of original size [2022-12-14 10:27:56,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 222 treesize of output 261 [2022-12-14 10:27:56,726 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:27:56,727 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 2 case distinctions, treesize of input 14 treesize of output 19 [2022-12-14 10:27:56,865 INFO L321 Elim1Store]: treesize reduction 39, result has 51.9 percent of original size [2022-12-14 10:27:56,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 145 treesize of output 190 [2022-12-14 10:27:56,936 INFO L321 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2022-12-14 10:27:56,936 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 52 treesize of output 17 [2022-12-14 10:27:56,957 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 8 treesize of output 4 [2022-12-14 10:27:57,042 INFO L321 Elim1Store]: treesize reduction 19, result has 62.0 percent of original size [2022-12-14 10:27:57,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 300 treesize of output 316 [2022-12-14 10:27:57,069 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:27:57,069 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 56 treesize of output 55 [2022-12-14 10:27:57,088 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 15 treesize of output 11 [2022-12-14 10:27:57,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-12-14 10:27:57,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997202674] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:27:57,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [519805259] [2022-12-14 10:27:57,560 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 10:27:57,560 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:27:57,560 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:27:57,561 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:27:57,561 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:27:57,589 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 10:27:57,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-12-14 10:27:57,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:57,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-12-14 10:27:57,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:57,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:57,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 37 [2022-12-14 10:27:57,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 17 treesize of output 22 [2022-12-14 10:27:57,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:57,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-12-14 10:27:57,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:57,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:57,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:57,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:57,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 362 treesize of output 384 [2022-12-14 10:27:57,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:57,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:57,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:27:57,971 INFO L321 Elim1Store]: treesize reduction 162, result has 13.8 percent of original size [2022-12-14 10:27:57,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 355 treesize of output 321 [2022-12-14 10:27:57,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:58,062 INFO L321 Elim1Store]: treesize reduction 182, result has 8.5 percent of original size [2022-12-14 10:27:58,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 350 treesize of output 344 [2022-12-14 10:27:58,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:58,118 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-12-14 10:27:58,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 50 [2022-12-14 10:27:58,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:58,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:58,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:58,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:58,159 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-12-14 10:27:58,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 70 [2022-12-14 10:27:58,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:58,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 140 [2022-12-14 10:27:58,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:58,177 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 140 treesize of output 124 [2022-12-14 10:27:58,184 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 27 [2022-12-14 10:27:58,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 10:27:58,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:58,222 INFO L321 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2022-12-14 10:27:58,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 61 [2022-12-14 10:27:58,325 INFO L321 Elim1Store]: treesize reduction 107, result has 25.2 percent of original size [2022-12-14 10:27:58,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 3487 treesize of output 3108 [2022-12-14 10:27:58,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:58,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 26 [2022-12-14 10:27:58,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:58,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:27:58,507 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-14 10:27:58,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 45 [2022-12-14 10:28:00,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:00,448 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 115 treesize of output 89 [2022-12-14 10:28:00,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:00,460 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 85 treesize of output 65 [2022-12-14 10:28:00,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:00,482 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 169 treesize of output 131 [2022-12-14 10:28:00,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:00,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:00,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:28:00,497 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 333 treesize of output 275 [2022-12-14 10:28:00,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:00,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:00,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:28:00,579 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 156 treesize of output 122 [2022-12-14 10:28:00,590 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 57 [2022-12-14 10:28:00,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 10:28:00,623 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 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 10:28:00,628 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 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 10:28:00,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 10:28:00,643 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 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 10:28:00,648 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 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 10:28:00,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 10:28:00,662 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 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 10:28:00,665 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 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 10:28:00,675 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:28:01,127 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '713#(and (= |ULTIMATE.start_main_~head~0#1.offset| |ULTIMATE.start_main_~x~0#1.offset|) (= 2 |ULTIMATE.start_main_~t1~0#1|) (= |ULTIMATE.start_main_~t1~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~x~0#1.base|) (+ |ULTIMATE.start_main_~x~0#1.offset| 4))) (= |ULTIMATE.start_main_~x~0#1.base| |ULTIMATE.start_main_~head~0#1.base|) (= |ULTIMATE.start_main_~t2~0#1| (select (select |#memory_int| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|)) (+ (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|) 4))) (= |ULTIMATE.start_main_~head~0#1.offset| |ULTIMATE.start_main_~prev~0#1.offset|) (= |ULTIMATE.start_main_~prev~0#1.base| |ULTIMATE.start_main_~head~0#1.base|) (= |#NULL.offset| 0) (not (= |ULTIMATE.start_main_~t2~0#1| 1)) (or (not (= |ULTIMATE.start_main_~x~0#1.base| 0)) (not (= |ULTIMATE.start_main_~x~0#1.offset| 0))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:28:01,127 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:28:01,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:28:01,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-12-14 10:28:01,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511880162] [2022-12-14 10:28:01,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:28:01,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 10:28:01,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:28:01,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 10:28:01,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=513, Unknown=2, NotChecked=94, Total=702 [2022-12-14 10:28:01,128 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:28:01,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:28:01,535 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2022-12-14 10:28:01,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 10:28:01,535 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 10:28:01,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:28:01,536 INFO L225 Difference]: With dead ends: 62 [2022-12-14 10:28:01,536 INFO L226 Difference]: Without dead ends: 60 [2022-12-14 10:28:01,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=122, Invalid=696, Unknown=2, NotChecked=110, Total=930 [2022-12-14 10:28:01,537 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 29 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:28:01,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 167 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 157 Invalid, 0 Unknown, 55 Unchecked, 0.3s Time] [2022-12-14 10:28:01,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-12-14 10:28:01,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2022-12-14 10:28:01,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:28:01,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2022-12-14 10:28:01,543 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 15 [2022-12-14 10:28:01,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:28:01,544 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2022-12-14 10:28:01,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:28:01,544 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2022-12-14 10:28:01,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 10:28:01,544 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:28:01,544 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:28:01,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 10:28:01,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:28:01,746 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:28:01,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:28:01,747 INFO L85 PathProgramCache]: Analyzing trace with hash -560672479, now seen corresponding path program 1 times [2022-12-14 10:28:01,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:28:01,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913662880] [2022-12-14 10:28:01,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:28:01,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:28:01,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:28:01,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:28:01,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:28:01,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913662880] [2022-12-14 10:28:01,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913662880] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:28:01,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271899232] [2022-12-14 10:28:01,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:28:01,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:28:01,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:28:01,836 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:28:01,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 10:28:01,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:28:01,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 10:28:01,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:28:01,958 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 25 treesize of output 17 [2022-12-14 10:28:01,960 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 21 treesize of output 13 [2022-12-14 10:28:01,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:28:01,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:28:01,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:28:01,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271899232] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:28:01,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [73836538] [2022-12-14 10:28:01,989 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 10:28:01,989 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:28:01,990 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:28:01,990 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:28:01,990 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:28:02,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:02,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:02,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:02,014 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 10:28:02,014 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 1 case distinctions, treesize of input 31 treesize of output 41 [2022-12-14 10:28:02,036 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-14 10:28:02,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2022-12-14 10:28:02,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:02,043 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 0 case distinctions, treesize of input 22 treesize of output 7 [2022-12-14 10:28:02,066 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 10:28:02,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-12-14 10:28:02,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:02,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-12-14 10:28:02,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:02,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:02,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:02,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:28:02,124 INFO L321 Elim1Store]: treesize reduction 42, result has 43.2 percent of original size [2022-12-14 10:28:02,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 64 [2022-12-14 10:28:02,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:02,140 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 10:28:02,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 18 [2022-12-14 10:28:02,169 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 10:28:02,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-12-14 10:28:02,207 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 10:28:02,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 10:28:02,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:02,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 18 [2022-12-14 10:28:02,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:02,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:28:02,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:28:02,372 INFO L321 Elim1Store]: treesize reduction 46, result has 37.0 percent of original size [2022-12-14 10:28:02,373 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 4 case distinctions, treesize of input 301 treesize of output 284 [2022-12-14 10:28:02,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:02,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:02,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:28:02,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:28:02,407 INFO L321 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2022-12-14 10:28:02,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 289 treesize of output 263 [2022-12-14 10:28:02,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:02,473 INFO L321 Elim1Store]: treesize reduction 114, result has 17.4 percent of original size [2022-12-14 10:28:02,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 262 treesize of output 274 [2022-12-14 10:28:02,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:02,505 INFO L321 Elim1Store]: treesize reduction 55, result has 8.3 percent of original size [2022-12-14 10:28:02,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 257 treesize of output 262 [2022-12-14 10:28:02,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:28:02,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:02,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:02,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:02,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:28:02,537 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-12-14 10:28:02,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 266 treesize of output 249 [2022-12-14 10:28:02,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:02,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:02,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:02,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:02,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:02,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:02,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:28:02,564 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 10:28:02,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 266 treesize of output 249 [2022-12-14 10:28:02,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:02,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:28:02,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:02,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:02,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:02,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:02,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:28:02,589 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-12-14 10:28:02,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 264 treesize of output 258 [2022-12-14 10:28:02,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 10:28:02,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:02,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:28:02,709 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 10:28:02,709 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 38 treesize of output 15 [2022-12-14 10:28:02,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:02,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:28:02,727 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 10:28:02,727 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 38 treesize of output 19 [2022-12-14 10:28:02,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:02,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:28:02,747 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 10:28:02,747 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 32 treesize of output 28 [2022-12-14 10:28:02,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:28:02,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:28:02,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 10:28:02,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:02,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:28:02,912 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 10:28:02,913 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 38 treesize of output 19 [2022-12-14 10:28:02,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:02,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:28:02,931 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 10:28:02,931 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 38 treesize of output 15 [2022-12-14 10:28:02,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:02,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:28:02,956 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 10:28:02,956 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 32 treesize of output 28 [2022-12-14 10:28:02,975 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:28:03,127 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '981#(and (or (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|) 0)) (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|) 0))) (= |ULTIMATE.start_main_~x~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1.base| 0) (= |ULTIMATE.start_main_~head~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:28:03,127 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:28:03,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:28:03,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-12-14 10:28:03,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087671075] [2022-12-14 10:28:03,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:28:03,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:28:03,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:28:03,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:28:03,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-12-14 10:28:03,128 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:28:03,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:28:03,255 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-12-14 10:28:03,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 10:28:03,256 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 10:28:03,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:28:03,256 INFO L225 Difference]: With dead ends: 50 [2022-12-14 10:28:03,256 INFO L226 Difference]: Without dead ends: 46 [2022-12-14 10:28:03,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-12-14 10:28:03,257 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:28:03,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 25 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:28:03,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-12-14 10:28:03,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2022-12-14 10:28:03,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:28:03,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2022-12-14 10:28:03,263 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 15 [2022-12-14 10:28:03,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:28:03,263 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2022-12-14 10:28:03,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:28:03,263 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2022-12-14 10:28:03,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 10:28:03,263 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:28:03,263 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:28:03,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 10:28:03,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:28:03,464 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:28:03,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:28:03,465 INFO L85 PathProgramCache]: Analyzing trace with hash 613681662, now seen corresponding path program 3 times [2022-12-14 10:28:03,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:28:03,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691433027] [2022-12-14 10:28:03,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:28:03,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:28:03,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:28:03,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:28:03,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:28:03,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691433027] [2022-12-14 10:28:03,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691433027] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:28:03,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597629711] [2022-12-14 10:28:03,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:28:03,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:28:03,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:28:03,889 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:28:03,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 10:28:04,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:28:04,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:28:04,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 81 conjunts are in the unsatisfiable core [2022-12-14 10:28:04,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:28:04,278 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 [2022-12-14 10:28:04,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:04,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-12-14 10:28:04,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:04,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-12-14 10:28:04,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:04,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:04,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 36 [2022-12-14 10:28:04,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:04,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:04,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 36 [2022-12-14 10:28:04,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:04,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 20 [2022-12-14 10:28:04,412 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 10:28:04,412 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 48 [2022-12-14 10:28:04,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:04,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 15 treesize of output 7 [2022-12-14 10:28:04,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:04,421 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 36 treesize of output 32 [2022-12-14 10:28:04,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 23 [2022-12-14 10:28:04,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:04,428 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 19 treesize of output 20 [2022-12-14 10:28:04,464 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 10:28:04,464 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 2 case distinctions, treesize of input 44 treesize of output 45 [2022-12-14 10:28:04,468 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 30 treesize of output 28 [2022-12-14 10:28:04,470 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 36 treesize of output 26 [2022-12-14 10:28:04,475 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 11 treesize of output 7 [2022-12-14 10:28:04,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 10:28:04,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 10:28:04,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:28:04,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:28:04,714 INFO L321 Elim1Store]: treesize reduction 14, result has 69.6 percent of original size [2022-12-14 10:28:04,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 248 treesize of output 289 [2022-12-14 10:28:04,906 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|))) (let ((.cse4 (select .cse0 |c_ULTIMATE.start_main_~x~0#1.offset|)) (.cse7 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base|))) (let ((.cse12 (= (select .cse7 |c_ULTIMATE.start_main_~x~0#1.offset|) 0)) (.cse11 (= .cse4 0))) (let ((.cse5 (and .cse12 .cse11)) (.cse2 (not .cse12)) (.cse3 (not .cse11)) (.cse1 (+ |c_ULTIMATE.start_main_~x~0#1.offset| 4))) (and (or (forall ((v_ArrVal_556 (Array Int Int)) (v_ArrVal_562 Int) (v_ArrVal_559 Int) (v_ArrVal_557 Int)) (or (= v_ArrVal_562 0) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| (store (store .cse0 .cse1 v_ArrVal_559) |c_ULTIMATE.start_main_~x~0#1.offset| v_ArrVal_562)) v_ArrVal_562 (store (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_556) v_ArrVal_562) 0 0) 4 v_ArrVal_557)) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) |c_ULTIMATE.start_main_~head~0#1.base|)) (not (= (select |c_#valid| v_ArrVal_562) 0)))) .cse2 .cse3) (or (forall ((v_ArrVal_547 (Array Int Int)) (v_ArrVal_559 Int)) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| (store .cse0 .cse1 v_ArrVal_559)) .cse4 v_ArrVal_547) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) |c_ULTIMATE.start_main_~head~0#1.base|))) .cse5) (or .cse2 (forall ((v_ArrVal_544 Int) (v_ArrVal_556 (Array Int Int)) (v_ArrVal_543 Int) (v_ArrVal_562 Int) (v_ArrVal_559 Int) (v_ArrVal_557 Int) (v_ArrVal_554 (Array Int Int))) (or (= (select (let ((.cse6 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| (store (store .cse0 .cse1 v_ArrVal_559) |c_ULTIMATE.start_main_~x~0#1.offset| v_ArrVal_562)) v_ArrVal_562 (store (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_556) v_ArrVal_562) 0 0) 4 v_ArrVal_557)))) (select .cse6 (select (select .cse6 |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| (store (store .cse7 .cse1 v_ArrVal_543) |c_ULTIMATE.start_main_~x~0#1.offset| 0)) v_ArrVal_562 (store (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_554) v_ArrVal_562) 0 0) 4 v_ArrVal_544)) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) 0) (= v_ArrVal_562 0) (not (= (select |c_#valid| v_ArrVal_562) 0)))) .cse3) (or (forall ((v_ArrVal_543 Int) (v_ArrVal_547 (Array Int Int)) (v_ArrVal_551 (Array Int Int)) (v_ArrVal_559 Int)) (= (let ((.cse8 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| (store .cse7 .cse1 v_ArrVal_543)) .cse4 v_ArrVal_551))) (select (select .cse8 (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| (store .cse0 .cse1 v_ArrVal_559)) .cse4 v_ArrVal_547) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) (select (select .cse8 |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) 0)) .cse5) (or .cse5 (forall ((v_ArrVal_543 Int) (v_ArrVal_547 (Array Int Int)) (v_ArrVal_551 (Array Int Int)) (v_ArrVal_559 Int)) (= (select (let ((.cse9 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| (store .cse0 .cse1 v_ArrVal_559)) .cse4 v_ArrVal_547))) (select .cse9 (select (select .cse9 |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| (store .cse7 .cse1 v_ArrVal_543)) .cse4 v_ArrVal_551) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) 0))) (or .cse2 .cse3 (forall ((v_ArrVal_544 Int) (v_ArrVal_556 (Array Int Int)) (v_ArrVal_543 Int) (v_ArrVal_562 Int) (v_ArrVal_559 Int) (v_ArrVal_557 Int) (v_ArrVal_554 (Array Int Int))) (or (= v_ArrVal_562 0) (= (let ((.cse10 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| (store (store .cse7 .cse1 v_ArrVal_543) |c_ULTIMATE.start_main_~x~0#1.offset| 0)) v_ArrVal_562 (store (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_554) v_ArrVal_562) 0 0) 4 v_ArrVal_544)))) (select (select .cse10 (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| (store (store .cse0 .cse1 v_ArrVal_559) |c_ULTIMATE.start_main_~x~0#1.offset| v_ArrVal_562)) v_ArrVal_562 (store (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_556) v_ArrVal_562) 0 0) 4 v_ArrVal_557)) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) (select (select .cse10 |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) 0) (not (= (select |c_#valid| v_ArrVal_562) 0)))))))))) is different from false [2022-12-14 10:28:09,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:28:09,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597629711] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:28:09,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1777574499] [2022-12-14 10:28:09,417 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 10:28:09,417 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:28:09,417 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:28:09,417 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:28:09,417 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:28:09,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:09,424 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 0 case distinctions, treesize of input 22 treesize of output 7 [2022-12-14 10:28:09,447 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 10:28:09,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-12-14 10:28:09,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:09,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-12-14 10:28:09,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 17 treesize of output 22 [2022-12-14 10:28:09,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:09,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:09,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 37 [2022-12-14 10:28:09,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:09,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:09,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:09,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:09,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 362 treesize of output 389 [2022-12-14 10:28:09,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:09,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:09,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:28:09,834 INFO L321 Elim1Store]: treesize reduction 162, result has 13.8 percent of original size [2022-12-14 10:28:09,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 360 treesize of output 326 [2022-12-14 10:28:09,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:09,901 INFO L321 Elim1Store]: treesize reduction 182, result has 8.5 percent of original size [2022-12-14 10:28:09,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 310 treesize of output 300 [2022-12-14 10:28:09,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:09,939 INFO L321 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2022-12-14 10:28:09,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 61 [2022-12-14 10:28:09,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:09,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:09,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:09,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:09,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:09,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 58 [2022-12-14 10:28:09,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 10:28:09,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:09,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 48 [2022-12-14 10:28:09,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 23 [2022-12-14 10:28:09,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:09,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 10:28:10,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:10,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:10,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:10,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:10,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:10,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 61 [2022-12-14 10:28:10,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:10,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:10,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:10,059 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 10:28:10,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 270 treesize of output 182 [2022-12-14 10:28:10,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-12-14 10:28:10,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:10,079 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 19 treesize of output 13 [2022-12-14 10:28:10,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:10,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:28:10,092 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 10:28:10,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 43 [2022-12-14 10:28:10,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-12-14 10:28:10,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:10,109 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 19 treesize of output 13 [2022-12-14 10:28:10,130 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 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 10:28:10,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 10:28:10,138 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 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 10:28:10,148 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 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 10:28:10,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 10:28:10,156 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 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 10:28:10,164 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 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 10:28:10,168 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 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 10:28:10,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 10:28:10,180 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:28:10,644 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1231#(and (= |ULTIMATE.start_main_~head~0#1.offset| |ULTIMATE.start_main_~x~0#1.offset|) (= 2 |ULTIMATE.start_main_~t1~0#1|) (= |ULTIMATE.start_main_~t1~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~x~0#1.base|) (+ |ULTIMATE.start_main_~x~0#1.offset| 4))) (= |ULTIMATE.start_main_~x~0#1.base| |ULTIMATE.start_main_~head~0#1.base|) (= |ULTIMATE.start_main_~t2~0#1| (select (select |#memory_int| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|)) (+ (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|) 4))) (= |ULTIMATE.start_main_~head~0#1.offset| |ULTIMATE.start_main_~prev~0#1.offset|) (= |ULTIMATE.start_main_~prev~0#1.base| |ULTIMATE.start_main_~head~0#1.base|) (= |#NULL.offset| 0) (not (= |ULTIMATE.start_main_~t2~0#1| 1)) (or (not (= |ULTIMATE.start_main_~x~0#1.base| 0)) (not (= |ULTIMATE.start_main_~x~0#1.offset| 0))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:28:10,644 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:28:10,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:28:10,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2022-12-14 10:28:10,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7060439] [2022-12-14 10:28:10,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:28:10,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 10:28:10,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:28:10,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 10:28:10,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=305, Unknown=1, NotChecked=36, Total=420 [2022-12-14 10:28:10,645 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:28:11,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:28:11,131 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-12-14 10:28:11,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 10:28:11,132 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 10:28:11,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:28:11,132 INFO L225 Difference]: With dead ends: 50 [2022-12-14 10:28:11,132 INFO L226 Difference]: Without dead ends: 43 [2022-12-14 10:28:11,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=83, Invalid=340, Unknown=1, NotChecked=38, Total=462 [2022-12-14 10:28:11,133 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 4 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:28:11,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 92 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 93 Invalid, 0 Unknown, 21 Unchecked, 0.3s Time] [2022-12-14 10:28:11,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-14 10:28:11,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-12-14 10:28:11,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.170731707317073) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:28:11,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-12-14 10:28:11,141 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 16 [2022-12-14 10:28:11,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:28:11,141 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-12-14 10:28:11,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:28:11,141 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-12-14 10:28:11,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 10:28:11,142 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:28:11,142 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:28:11,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 10:28:11,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:28:11,343 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:28:11,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:28:11,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1110894669, now seen corresponding path program 1 times [2022-12-14 10:28:11,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:28:11,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927129862] [2022-12-14 10:28:11,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:28:11,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:28:11,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:28:11,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:28:11,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:28:11,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927129862] [2022-12-14 10:28:11,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927129862] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:28:11,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058115900] [2022-12-14 10:28:11,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:28:11,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:28:11,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:28:11,812 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:28:11,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2905b0c9-fcdc-4a10-a759-7d48ea1e9b57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 10:28:11,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:28:11,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 71 conjunts are in the unsatisfiable core [2022-12-14 10:28:11,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:28:11,924 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 [2022-12-14 10:28:11,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-12-14 10:28:11,947 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 10:28:11,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-12-14 10:28:11,953 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-12-14 10:28:11,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 10:28:12,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:12,039 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 53 [2022-12-14 10:28:12,043 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-12-14 10:28:12,050 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 10:28:12,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 44 [2022-12-14 10:28:12,053 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 0 case distinctions, treesize of input 10 treesize of output 9 [2022-12-14 10:28:12,058 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 20 treesize of output 22 [2022-12-14 10:28:12,084 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 19 treesize of output 18 [2022-12-14 10:28:12,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 10:28:12,088 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 24 treesize of output 12 [2022-12-14 10:28:12,108 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 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 10:28:12,111 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 18 treesize of output 20 [2022-12-14 10:28:12,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 10:28:12,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 38 [2022-12-14 10:28:12,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 34 treesize of output 26 [2022-12-14 10:28:12,161 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 28 treesize of output 20 [2022-12-14 10:28:12,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:28:12,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:28:12,188 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_759 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_759) |c_ULTIMATE.start_main_~prev~0#1.base|) (+ |c_ULTIMATE.start_main_~prev~0#1.offset| 4)) 1)) is different from false [2022-12-14 10:28:12,195 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_759 (Array Int Int)) (v_ArrVal_756 Int)) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset| v_ArrVal_756)) (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_759) |c_ULTIMATE.start_main_~x~0#1.base|) (+ |c_ULTIMATE.start_main_~x~0#1.offset| 4)) 1)) is different from false [2022-12-14 10:28:12,276 INFO L321 Elim1Store]: treesize reduction 24, result has 64.2 percent of original size [2022-12-14 10:28:12,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 199 treesize of output 252 [2022-12-14 10:28:12,299 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:28:12,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 182 treesize of output 196 [2022-12-14 10:28:12,335 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:28:12,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 181 [2022-12-14 10:28:12,359 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:28:12,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 10:28:12,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 10:28:12,387 INFO L321 Elim1Store]: treesize reduction 14, result has 65.0 percent of original size [2022-12-14 10:28:12,387 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 2 case distinctions, treesize of input 14 treesize of output 26 [2022-12-14 10:28:12,421 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 8 treesize of output 4 [2022-12-14 10:28:12,436 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 8 treesize of output 4 [2022-12-14 10:28:12,484 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 [2022-12-14 10:28:12,494 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 6 treesize of output 4 [2022-12-14 10:28:12,523 INFO L321 Elim1Store]: treesize reduction 19, result has 62.0 percent of original size [2022-12-14 10:28:12,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 89 treesize of output 105 [2022-12-14 10:28:12,536 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:28:12,536 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 56 treesize of output 55 [2022-12-14 10:28:12,543 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 15 treesize of output 11 [2022-12-14 10:28:12,683 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:28:12,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 32 [2022-12-14 10:28:12,689 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:28:12,690 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 81 treesize of output 60 [2022-12-14 10:28:12,693 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 39 treesize of output 35 [2022-12-14 10:28:12,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-12-14 10:28:12,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058115900] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:28:12,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [118421300] [2022-12-14 10:28:12,764 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 10:28:12,764 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:28:12,764 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:28:12,764 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:28:12,764 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:28:12,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:12,776 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 0 case distinctions, treesize of input 22 treesize of output 7 [2022-12-14 10:28:12,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:12,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:12,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:12,793 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 10:28:12,794 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 1 case distinctions, treesize of input 31 treesize of output 41 [2022-12-14 10:28:12,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:12,801 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 0 case distinctions, treesize of input 22 treesize of output 7 [2022-12-14 10:28:12,819 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-14 10:28:12,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2022-12-14 10:28:12,845 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 10:28:12,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-12-14 10:28:12,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:12,871 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 10:28:12,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 22 [2022-12-14 10:28:12,900 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 10:28:12,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-12-14 10:28:12,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:12,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:12,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:12,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:28:12,946 INFO L321 Elim1Store]: treesize reduction 42, result has 43.2 percent of original size [2022-12-14 10:28:12,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 64 [2022-12-14 10:28:12,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:12,965 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 10:28:12,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 18 [2022-12-14 10:28:13,003 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 10:28:13,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 10:28:13,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:13,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:28:13,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:28:13,099 INFO L321 Elim1Store]: treesize reduction 55, result has 24.7 percent of original size [2022-12-14 10:28:13,100 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 4 case distinctions, treesize of input 301 treesize of output 275 [2022-12-14 10:28:13,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:28:13,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:13,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:13,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:28:13,135 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-12-14 10:28:13,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 278 treesize of output 261 [2022-12-14 10:28:13,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:13,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:28:13,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:28:13,187 INFO L321 Elim1Store]: treesize reduction 46, result has 37.0 percent of original size [2022-12-14 10:28:13,187 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 4 case distinctions, treesize of input 301 treesize of output 284 [2022-12-14 10:28:13,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:13,238 INFO L321 Elim1Store]: treesize reduction 82, result has 16.3 percent of original size [2022-12-14 10:28:13,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 257 treesize of output 262 [2022-12-14 10:28:13,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:13,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:13,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:13,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:13,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:13,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:28:13,274 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-12-14 10:28:13,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 266 treesize of output 249 [2022-12-14 10:28:13,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:13,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:13,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:13,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:28:13,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:13,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:13,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:28:13,301 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-12-14 10:28:13,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 264 treesize of output 258 [2022-12-14 10:28:13,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:13,347 INFO L321 Elim1Store]: treesize reduction 122, result has 11.6 percent of original size [2022-12-14 10:28:13,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 262 treesize of output 266 [2022-12-14 10:28:13,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:13,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:28:13,504 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 10:28:13,505 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 38 treesize of output 19 [2022-12-14 10:28:13,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:13,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:28:13,522 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 10:28:13,522 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 38 treesize of output 15 [2022-12-14 10:28:13,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:13,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:28:13,542 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 10:28:13,542 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 32 treesize of output 28 [2022-12-14 10:28:13,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 10:28:13,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:28:13,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:13,939 INFO L321 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2022-12-14 10:28:13,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 338 treesize of output 363 [2022-12-14 10:28:13,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:14,434 INFO L321 Elim1Store]: treesize reduction 190, result has 26.1 percent of original size [2022-12-14 10:28:14,434 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 373 treesize of output 373 [2022-12-14 10:28:14,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:14,560 INFO L321 Elim1Store]: treesize reduction 178, result has 23.6 percent of original size [2022-12-14 10:28:14,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 318 treesize of output 314 [2022-12-14 10:28:14,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:28:14,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 10:28:14,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:28:14,640 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-14 10:28:14,640 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 2 case distinctions, treesize of input 46 treesize of output 19 [2022-12-14 10:28:14,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:14,648 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 19 treesize of output 13 [2022-12-14 10:28:15,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 10:28:15,275 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 10:28:15,299 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-12-14 10:28:15,300 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 202 treesize of output 230 [2022-12-14 10:28:15,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:15,314 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 49 treesize of output 15 [2022-12-14 10:28:15,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:15,330 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 19 treesize of output 13 [2022-12-14 10:28:15,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:15,435 INFO L321 Elim1Store]: treesize reduction 150, result has 25.0 percent of original size [2022-12-14 10:28:15,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 5 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 7 new quantified variables, introduced 7 case distinctions, treesize of input 847 treesize of output 1088 [2022-12-14 10:28:15,457 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 773 treesize of output 771 [2022-12-14 10:28:15,479 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 771 treesize of output 767 [2022-12-14 10:28:15,505 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 767 treesize of output 763 [2022-12-14 10:28:15,537 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 763 treesize of output 761 [2022-12-14 10:28:15,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:15,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:28:15,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 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 45 treesize of output 205 [2022-12-14 10:29:26,802 WARN L233 SmtUtils]: Spent 1.18m on a formula simplification. DAG size of input: 203 DAG size of output: 117 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 10:29:26,802 INFO L321 Elim1Store]: treesize reduction 824, result has 31.8 percent of original size [2022-12-14 10:29:26,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 30 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 30 new quantified variables, introduced 61 case distinctions, treesize of input 2296 treesize of output 39197 [2022-12-14 10:29:43,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:29:43,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:29:44,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 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 115 treesize of output 247 [2022-12-14 10:29:44,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:29:44,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:29:44,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 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 125 treesize of output 269 [2022-12-14 10:29:44,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:29:44,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:29:44,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 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 140 treesize of output 280 [2022-12-14 10:29:46,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:29:46,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:29:46,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 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 125 treesize of output 269 [2022-12-14 10:29:47,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:29:47,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:29:47,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 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 140 treesize of output 280 [2022-12-14 10:29:48,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:29:48,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:29:48,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 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 140 treesize of output 280