./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/pcompf.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/pcompf.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7 --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 f995d1a14a0e61f10b2f5817b1ff2bf8d1511dbe7297ad48450a11ed6f3a9160 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:01:13,297 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:01:13,301 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:01:13,380 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:01:13,380 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:01:13,382 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:01:13,391 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:01:13,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:01:13,402 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:01:13,411 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:01:13,413 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:01:13,415 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:01:13,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:01:13,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:01:13,423 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:01:13,431 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:01:13,436 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:01:13,437 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:01:13,440 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:01:13,446 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:01:13,448 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:01:13,450 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:01:13,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:01:13,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:01:13,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:01:13,459 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:01:13,459 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:01:13,461 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:01:13,461 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:01:13,463 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:01:13,463 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:01:13,465 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:01:13,466 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:01:13,467 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:01:13,468 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:01:13,469 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:01:13,470 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:01:13,471 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:01:13,471 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:01:13,473 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:01:13,474 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:01:13,475 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:01:13,508 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:01:13,508 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:01:13,509 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:01:13,509 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:01:13,510 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:01:13,510 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:01:13,511 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:01:13,511 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:01:13,511 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:01:13,511 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:01:13,512 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:01:13,512 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:01:13,512 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:01:13,513 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:01:13,513 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:01:13,513 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:01:13,513 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:01:13,514 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:01:13,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:01:13,518 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:01:13,519 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:01:13,519 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:01:13,519 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:01:13,520 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:01:13,520 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:01:13,520 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:01:13,523 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:01:13,523 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:01:13,524 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:01:13,525 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:01:13,525 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:01:13,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:01:13,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:01:13,526 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:01:13,526 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:01:13,527 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:01:13,528 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:01:13,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:01:13,529 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:01:13,529 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:01:13,529 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:01:13,529 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f995d1a14a0e61f10b2f5817b1ff2bf8d1511dbe7297ad48450a11ed6f3a9160 [2021-11-25 19:01:13,878 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:01:13,909 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:01:13,913 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:01:13,914 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:01:13,915 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:01:13,917 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-fpi/pcompf.c [2021-11-25 19:01:14,023 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/data/f91fcbd70/5272ea0014a642fe98efb282a534ec40/FLAG761c3d54a [2021-11-25 19:01:14,573 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:01:14,573 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/sv-benchmarks/c/array-fpi/pcompf.c [2021-11-25 19:01:14,582 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/data/f91fcbd70/5272ea0014a642fe98efb282a534ec40/FLAG761c3d54a [2021-11-25 19:01:14,935 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/data/f91fcbd70/5272ea0014a642fe98efb282a534ec40 [2021-11-25 19:01:14,938 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:01:14,940 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:01:14,942 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:01:14,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:01:14,947 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:01:14,949 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:01:14" (1/1) ... [2021-11-25 19:01:14,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58ad855b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:01:14, skipping insertion in model container [2021-11-25 19:01:14,953 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:01:14" (1/1) ... [2021-11-25 19:01:14,962 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:01:14,988 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:01:15,274 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/sv-benchmarks/c/array-fpi/pcompf.c[589,602] [2021-11-25 19:01:15,330 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:01:15,339 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:01:15,355 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/sv-benchmarks/c/array-fpi/pcompf.c[589,602] [2021-11-25 19:01:15,368 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:01:15,386 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:01:15,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:01:15 WrapperNode [2021-11-25 19:01:15,387 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:01:15,389 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:01:15,389 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:01:15,389 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:01:15,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:01:15" (1/1) ... [2021-11-25 19:01:15,409 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:01:15" (1/1) ... [2021-11-25 19:01:15,449 INFO L137 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 89 [2021-11-25 19:01:15,450 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:01:15,451 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:01:15,451 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:01:15,451 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:01:15,459 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:01:15" (1/1) ... [2021-11-25 19:01:15,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:01:15" (1/1) ... [2021-11-25 19:01:15,463 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:01:15" (1/1) ... [2021-11-25 19:01:15,464 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:01:15" (1/1) ... [2021-11-25 19:01:15,472 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:01:15" (1/1) ... [2021-11-25 19:01:15,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:01:15" (1/1) ... [2021-11-25 19:01:15,484 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:01:15" (1/1) ... [2021-11-25 19:01:15,487 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:01:15,495 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:01:15,495 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:01:15,496 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:01:15,497 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:01:15" (1/1) ... [2021-11-25 19:01:15,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:01:15,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:01:15,532 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:01:15,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:01:15,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:01:15,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:01:15,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 19:01:15,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 19:01:15,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:01:15,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:01:15,584 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:01:15,666 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:01:15,668 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:01:15,881 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:01:15,927 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:01:15,928 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-25 19:01:15,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:01:15 BoogieIcfgContainer [2021-11-25 19:01:15,931 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:01:15,934 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:01:15,934 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:01:15,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:01:15,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:01:14" (1/3) ... [2021-11-25 19:01:15,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ed1cd93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:01:15, skipping insertion in model container [2021-11-25 19:01:15,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:01:15" (2/3) ... [2021-11-25 19:01:15,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ed1cd93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:01:15, skipping insertion in model container [2021-11-25 19:01:15,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:01:15" (3/3) ... [2021-11-25 19:01:15,951 INFO L111 eAbstractionObserver]: Analyzing ICFG pcompf.c [2021-11-25 19:01:15,960 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:01:15,960 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:01:16,020 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:01:16,032 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:01:16,032 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:01:16,050 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 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) [2021-11-25 19:01:16,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 19:01:16,056 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:01:16,057 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:01:16,058 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:01:16,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:01:16,065 INFO L85 PathProgramCache]: Analyzing trace with hash 697271499, now seen corresponding path program 1 times [2021-11-25 19:01:16,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:01:16,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845667081] [2021-11-25 19:01:16,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:16,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:01:16,235 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:01:16,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [705731951] [2021-11-25 19:01:16,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:16,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:01:16,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:01:16,239 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:01:16,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:01:16,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:01:16,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 19:01:16,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:01:16,754 INFO L354 Elim1Store]: treesize reduction 117, result has 35.4 percent of original size [2021-11-25 19:01:16,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 182 [2021-11-25 19:01:16,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 19:01:16,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 19:01:16,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 19:01:19,012 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:01:19,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2021-11-25 19:01:19,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 19:01:19,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-11-25 19:01:19,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 19:01:19,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:01:19,603 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:01:19,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:01:19,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:01:19,751 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:01:19,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845667081] [2021-11-25 19:01:19,751 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:01:19,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705731951] [2021-11-25 19:01:19,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705731951] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:01:19,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:01:19,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:01:19,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813546250] [2021-11-25 19:01:19,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:01:19,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:01:19,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:01:19,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:01:19,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:01:19,816 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 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 5 states, 5 states have (on average 1.6) internal successors, (8), 5 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) [2021-11-25 19:01:19,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:01:19,975 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2021-11-25 19:01:19,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:01:19,978 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 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 [2021-11-25 19:01:19,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:01:19,988 INFO L225 Difference]: With dead ends: 37 [2021-11-25 19:01:19,988 INFO L226 Difference]: Without dead ends: 22 [2021-11-25 19:01:19,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:01:19,996 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:01:19,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 19 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:01:20,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-25 19:01:20,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 15. [2021-11-25 19:01:20,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 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) [2021-11-25 19:01:20,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 21 transitions. [2021-11-25 19:01:20,040 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 21 transitions. Word has length 8 [2021-11-25 19:01:20,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:01:20,040 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 21 transitions. [2021-11-25 19:01:20,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 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) [2021-11-25 19:01:20,041 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 21 transitions. [2021-11-25 19:01:20,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 19:01:20,042 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:01:20,042 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:01:20,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-25 19:01:20,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-25 19:01:20,256 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:01:20,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:01:20,257 INFO L85 PathProgramCache]: Analyzing trace with hash 131371694, now seen corresponding path program 1 times [2021-11-25 19:01:20,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:01:20,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362876994] [2021-11-25 19:01:20,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:20,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:01:20,297 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:01:20,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1117315322] [2021-11-25 19:01:20,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:20,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:01:20,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:01:20,300 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:01:20,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:01:20,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:01:20,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:01:20,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:01:20,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:01:20,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:01:20,459 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:01:20,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362876994] [2021-11-25 19:01:20,459 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:01:20,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117315322] [2021-11-25 19:01:20,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117315322] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:01:20,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:01:20,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:01:20,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759446808] [2021-11-25 19:01:20,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:01:20,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:01:20,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:01:20,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:01:20,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:01:20,465 INFO L87 Difference]: Start difference. First operand 15 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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) [2021-11-25 19:01:20,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:01:20,564 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2021-11-25 19:01:20,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:01:20,565 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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 9 [2021-11-25 19:01:20,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:01:20,569 INFO L225 Difference]: With dead ends: 36 [2021-11-25 19:01:20,569 INFO L226 Difference]: Without dead ends: 29 [2021-11-25 19:01:20,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:01:20,577 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 13 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:01:20,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 12 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:01:20,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-25 19:01:20,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 17. [2021-11-25 19:01:20,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 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) [2021-11-25 19:01:20,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2021-11-25 19:01:20,590 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 9 [2021-11-25 19:01:20,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:01:20,591 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2021-11-25 19:01:20,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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) [2021-11-25 19:01:20,591 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2021-11-25 19:01:20,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 19:01:20,592 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:01:20,592 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:01:20,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:01:20,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:01:20,819 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:01:20,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:01:20,820 INFO L85 PathProgramCache]: Analyzing trace with hash -197136011, now seen corresponding path program 1 times [2021-11-25 19:01:20,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:01:20,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271300240] [2021-11-25 19:01:20,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:20,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:01:20,853 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:01:20,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [561113047] [2021-11-25 19:01:20,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:20,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:01:20,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:01:20,855 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:01:20,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:01:20,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:01:20,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:01:20,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:01:20,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:01:20,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:01:21,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:01:21,014 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:01:21,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271300240] [2021-11-25 19:01:21,015 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:01:21,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561113047] [2021-11-25 19:01:21,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561113047] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:01:21,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1850622583] [2021-11-25 19:01:21,050 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 19:01:21,051 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:01:21,056 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:01:21,063 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:01:21,064 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:01:21,323 INFO L354 Elim1Store]: treesize reduction 185, result has 24.5 percent of original size [2021-11-25 19:01:21,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 5 case distinctions, treesize of input 34 treesize of output 76 [2021-11-25 19:01:21,454 INFO L354 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2021-11-25 19:01:21,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 63 [2021-11-25 19:01:21,761 INFO L354 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2021-11-25 19:01:21,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2021-11-25 19:01:21,802 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 19:01:21,819 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 19:01:21,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:21,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-11-25 19:01:21,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:21,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:21,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:21,933 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:01:21,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 62 treesize of output 55 [2021-11-25 19:01:21,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:21,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-11-25 19:01:22,058 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:01:22,580 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '288#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~b~0#1.offset|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1.offset|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~b~0#1.offset| 0) (<= ~N~0 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-25 19:01:22,580 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:01:22,580 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:01:22,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-25 19:01:22,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236690356] [2021-11-25 19:01:22,581 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:01:22,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:01:22,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:01:22,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:01:22,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-11-25 19:01:22,583 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) [2021-11-25 19:01:22,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:01:22,699 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2021-11-25 19:01:22,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 19:01:22,700 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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 9 [2021-11-25 19:01:22,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:01:22,701 INFO L225 Difference]: With dead ends: 33 [2021-11-25 19:01:22,701 INFO L226 Difference]: Without dead ends: 27 [2021-11-25 19:01:22,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-11-25 19:01:22,704 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:01:22,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 22 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:01:22,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-25 19:01:22,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2021-11-25 19:01:22,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 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) [2021-11-25 19:01:22,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-11-25 19:01:22,724 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2021-11-25 19:01:22,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:01:22,724 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-11-25 19:01:22,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) [2021-11-25 19:01:22,727 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-11-25 19:01:22,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 19:01:22,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:01:22,728 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:01:22,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:01:22,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:01:22,930 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:01:22,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:01:22,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1958511373, now seen corresponding path program 1 times [2021-11-25 19:01:22,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:01:22,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194829048] [2021-11-25 19:01:22,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:22,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:01:22,992 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:01:22,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1015283532] [2021-11-25 19:01:22,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:22,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:01:22,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:01:23,000 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:01:23,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:01:23,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:01:23,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 19:01:23,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:01:23,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:01:23,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:01:23,149 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:01:23,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194829048] [2021-11-25 19:01:23,149 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:01:23,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015283532] [2021-11-25 19:01:23,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015283532] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:01:23,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:01:23,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 19:01:23,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580006061] [2021-11-25 19:01:23,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:01:23,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:01:23,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:01:23,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:01:23,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:01:23,157 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) [2021-11-25 19:01:23,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:01:23,241 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-11-25 19:01:23,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:01:23,242 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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 11 [2021-11-25 19:01:23,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:01:23,244 INFO L225 Difference]: With dead ends: 29 [2021-11-25 19:01:23,244 INFO L226 Difference]: Without dead ends: 18 [2021-11-25 19:01:23,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:01:23,249 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 8 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:01:23,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 15 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:01:23,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-25 19:01:23,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2021-11-25 19:01:23,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 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) [2021-11-25 19:01:23,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-11-25 19:01:23,266 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 11 [2021-11-25 19:01:23,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:01:23,266 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-11-25 19:01:23,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) [2021-11-25 19:01:23,267 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-11-25 19:01:23,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 19:01:23,268 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:01:23,268 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:01:23,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:01:23,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:01:23,479 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:01:23,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:01:23,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1012980313, now seen corresponding path program 1 times [2021-11-25 19:01:23,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:01:23,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579463305] [2021-11-25 19:01:23,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:23,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:01:23,544 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:01:23,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1665588117] [2021-11-25 19:01:23,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:23,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:01:23,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:01:23,546 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:01:23,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:01:23,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:01:23,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-25 19:01:23,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:01:23,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-11-25 19:01:23,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:23,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:23,690 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:01:23,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 17 treesize of output 23 [2021-11-25 19:01:23,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 19:01:23,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 16 [2021-11-25 19:01:23,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 19:01:23,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:23,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 19:01:23,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:01:23,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:01:24,015 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_267 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_267) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) 0)) is different from false [2021-11-25 19:01:24,041 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_267 (Array Int Int)) (v_ArrVal_266 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_266) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_267) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) 0)) is different from false [2021-11-25 19:01:24,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-25 19:01:24,070 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:01:24,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579463305] [2021-11-25 19:01:24,071 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:01:24,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665588117] [2021-11-25 19:01:24,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665588117] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:01:24,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1991153164] [2021-11-25 19:01:24,074 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 19:01:24,075 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:01:24,075 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:01:24,076 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:01:24,076 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:01:24,321 INFO L354 Elim1Store]: treesize reduction 185, result has 24.5 percent of original size [2021-11-25 19:01:24,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 5 case distinctions, treesize of input 34 treesize of output 76 [2021-11-25 19:01:24,472 INFO L354 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2021-11-25 19:01:24,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 63 [2021-11-25 19:01:24,776 INFO L354 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2021-11-25 19:01:24,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2021-11-25 19:01:24,793 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 19:01:24,795 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 19:01:24,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:24,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-11-25 19:01:24,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:24,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:24,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:24,877 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:01:24,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 62 treesize of output 55 [2021-11-25 19:01:24,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:24,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-11-25 19:01:24,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:24,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:24,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:24,955 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:24,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-25 19:01:25,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:25,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:25,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:25,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:25,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:25,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:25,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:25,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:25,027 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-25 19:01:25,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 77 treesize of output 76 [2021-11-25 19:01:25,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:25,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:25,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:25,074 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:25,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-25 19:01:25,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:25,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:25,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:25,136 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:25,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-25 19:01:25,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:25,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:25,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:25,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:25,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:25,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:25,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:25,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:25,244 INFO L354 Elim1Store]: treesize reduction 144, result has 6.5 percent of original size [2021-11-25 19:01:25,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 11 case distinctions, treesize of input 67 treesize of output 79 [2021-11-25 19:01:25,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:25,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:25,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:25,312 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:25,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-25 19:01:25,354 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:01:25,803 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '550#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~b~0#1.offset|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1.offset|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-25 19:01:25,803 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:01:25,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:01:25,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-11-25 19:01:25,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651995809] [2021-11-25 19:01:25,804 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:01:25,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 19:01:25,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:01:25,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 19:01:25,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=197, Unknown=2, NotChecked=58, Total=306 [2021-11-25 19:01:25,806 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 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) [2021-11-25 19:01:26,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:01:26,051 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-11-25 19:01:26,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:01:26,052 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 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 11 [2021-11-25 19:01:26,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:01:26,053 INFO L225 Difference]: With dead ends: 29 [2021-11-25 19:01:26,053 INFO L226 Difference]: Without dead ends: 27 [2021-11-25 19:01:26,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=301, Unknown=2, NotChecked=74, Total=462 [2021-11-25 19:01:26,055 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:01:26,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 38 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 77 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2021-11-25 19:01:26,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-25 19:01:26,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 16. [2021-11-25 19:01:26,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 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) [2021-11-25 19:01:26,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2021-11-25 19:01:26,060 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 11 [2021-11-25 19:01:26,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:01:26,061 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2021-11-25 19:01:26,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 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) [2021-11-25 19:01:26,061 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2021-11-25 19:01:26,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 19:01:26,061 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:01:26,062 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:01:26,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:01:26,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:01:26,275 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:01:26,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:01:26,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1328410336, now seen corresponding path program 2 times [2021-11-25 19:01:26,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:01:26,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167571459] [2021-11-25 19:01:26,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:26,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:01:26,306 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:01:26,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936944191] [2021-11-25 19:01:26,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:01:26,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:01:26,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:01:26,308 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:01:26,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:01:26,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 19:01:26,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:01:26,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:01:26,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:01:26,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:01:26,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:01:26,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:01:26,554 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:01:26,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167571459] [2021-11-25 19:01:26,555 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:01:26,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936944191] [2021-11-25 19:01:26,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936944191] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:01:26,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [111868147] [2021-11-25 19:01:26,562 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 19:01:26,562 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:01:26,563 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:01:26,563 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:01:26,563 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:01:26,804 INFO L354 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2021-11-25 19:01:26,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2021-11-25 19:01:26,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 42 [2021-11-25 19:01:26,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 46 [2021-11-25 19:01:26,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:26,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 62 [2021-11-25 19:01:27,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:27,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:27,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:27,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:27,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:27,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:27,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:27,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:27,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:27,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:27,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:27,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:27,165 INFO L354 Elim1Store]: treesize reduction 156, result has 8.8 percent of original size [2021-11-25 19:01:27,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 478 treesize of output 477 [2021-11-25 19:01:27,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:27,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-11-25 19:01:27,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:27,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:27,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:27,497 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:27,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-25 19:01:27,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:27,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:27,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:27,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:27,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:27,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:27,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:27,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:27,556 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-25 19:01:27,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 108 treesize of output 107 [2021-11-25 19:01:27,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:27,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:27,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:27,605 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:27,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-25 19:01:27,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:27,634 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:27,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-25 19:01:27,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:27,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:27,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:27,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:27,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:27,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:27,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:27,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:27,732 INFO L354 Elim1Store]: treesize reduction 139, result has 9.7 percent of original size [2021-11-25 19:01:27,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 11 case distinctions, treesize of input 98 treesize of output 115 [2021-11-25 19:01:27,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:27,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:27,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:27,794 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:27,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-25 19:01:27,823 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:01:28,138 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '706#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 19:01:28,139 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:01:28,139 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:01:28,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-25 19:01:28,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033374390] [2021-11-25 19:01:28,139 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:01:28,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 19:01:28,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:01:28,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 19:01:28,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-25 19:01:28,141 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 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) [2021-11-25 19:01:28,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:01:28,305 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2021-11-25 19:01:28,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 19:01:28,307 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 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 12 [2021-11-25 19:01:28,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:01:28,307 INFO L225 Difference]: With dead ends: 48 [2021-11-25 19:01:28,308 INFO L226 Difference]: Without dead ends: 37 [2021-11-25 19:01:28,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-11-25 19:01:28,309 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:01:28,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 18 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:01:28,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-25 19:01:28,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2021-11-25 19:01:28,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 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) [2021-11-25 19:01:28,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2021-11-25 19:01:28,316 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 12 [2021-11-25 19:01:28,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:01:28,316 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2021-11-25 19:01:28,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 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) [2021-11-25 19:01:28,316 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2021-11-25 19:01:28,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 19:01:28,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:01:28,317 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:01:28,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:01:28,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 19:01:28,518 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:01:28,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:01:28,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1261411007, now seen corresponding path program 1 times [2021-11-25 19:01:28,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:01:28,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88640606] [2021-11-25 19:01:28,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:28,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:01:28,558 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:01:28,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [167178452] [2021-11-25 19:01:28,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:28,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:01:28,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:01:28,575 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:01:28,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 19:01:28,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:01:28,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-25 19:01:28,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:01:28,715 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:28,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-11-25 19:01:28,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:28,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:28,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:28,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2021-11-25 19:01:28,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 19:01:28,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 19:01:28,790 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:28,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2021-11-25 19:01:28,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:28,846 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:28,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 19:01:28,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:28,891 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:28,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2021-11-25 19:01:29,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:01:29,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:01:29,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:01:29,387 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:01:29,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88640606] [2021-11-25 19:01:29,387 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:01:29,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167178452] [2021-11-25 19:01:29,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167178452] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:01:29,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [876932089] [2021-11-25 19:01:29,390 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:01:29,391 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:01:29,391 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:01:29,391 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:01:29,391 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:01:29,577 INFO L354 Elim1Store]: treesize reduction 185, result has 24.5 percent of original size [2021-11-25 19:01:29,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 5 case distinctions, treesize of input 34 treesize of output 76 [2021-11-25 19:01:29,811 INFO L354 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2021-11-25 19:01:29,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2021-11-25 19:01:29,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 42 [2021-11-25 19:01:29,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:29,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-11-25 19:01:29,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:29,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:29,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:29,932 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:01:29,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 62 treesize of output 55 [2021-11-25 19:01:29,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:29,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-11-25 19:01:30,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:30,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:30,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:30,014 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:30,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-25 19:01:30,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:30,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:30,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:30,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:30,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:30,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:30,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:30,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:30,074 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-25 19:01:30,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 77 treesize of output 76 [2021-11-25 19:01:30,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:30,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:30,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:30,117 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:30,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-25 19:01:30,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:30,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:30,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:30,167 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:30,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-25 19:01:30,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:30,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:30,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:30,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:30,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:30,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:30,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:30,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:30,255 INFO L354 Elim1Store]: treesize reduction 144, result has 6.5 percent of original size [2021-11-25 19:01:30,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 11 case distinctions, treesize of input 67 treesize of output 79 [2021-11-25 19:01:30,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:30,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:30,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:30,316 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:30,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-25 19:01:30,519 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:01:31,263 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '923#(and (<= 0 ~N~0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~b~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1.offset|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~b~0#1.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-25 19:01:31,264 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:01:31,264 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:01:31,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-11-25 19:01:31,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274771452] [2021-11-25 19:01:31,264 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:01:31,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-25 19:01:31,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:01:31,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-25 19:01:31,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=425, Unknown=12, NotChecked=0, Total=506 [2021-11-25 19:01:31,266 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 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) [2021-11-25 19:01:31,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:01:31,851 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2021-11-25 19:01:31,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 19:01:31,852 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 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 [2021-11-25 19:01:31,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:01:31,853 INFO L225 Difference]: With dead ends: 38 [2021-11-25 19:01:31,853 INFO L226 Difference]: Without dead ends: 36 [2021-11-25 19:01:31,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=151, Invalid=704, Unknown=15, NotChecked=0, Total=870 [2021-11-25 19:01:31,855 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 37 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:01:31,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 42 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 99 Invalid, 0 Unknown, 62 Unchecked, 0.1s Time] [2021-11-25 19:01:31,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-25 19:01:31,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2021-11-25 19:01:31,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 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) [2021-11-25 19:01:31,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-11-25 19:01:31,863 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 14 [2021-11-25 19:01:31,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:01:31,863 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-11-25 19:01:31,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 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) [2021-11-25 19:01:31,864 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-11-25 19:01:31,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 19:01:31,865 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:01:31,865 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:01:31,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-25 19:01:32,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-25 19:01:32,071 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:01:32,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:01:32,071 INFO L85 PathProgramCache]: Analyzing trace with hash 970754635, now seen corresponding path program 3 times [2021-11-25 19:01:32,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:01:32,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453301186] [2021-11-25 19:01:32,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:32,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:01:32,131 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:01:32,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [352373983] [2021-11-25 19:01:32,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:01:32,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:01:32,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:01:32,140 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:01:32,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 19:01:32,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:01:32,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:01:32,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-25 19:01:32,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:01:32,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-11-25 19:01:32,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:32,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:32,317 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:01:32,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 17 treesize of output 23 [2021-11-25 19:01:32,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 19:01:32,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 16 [2021-11-25 19:01:32,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 16 [2021-11-25 19:01:32,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 19:01:32,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 19:01:32,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:32,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 19:01:32,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:32,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-25 19:01:32,528 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:01:32,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:01:33,287 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_489 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_489) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) 0)) is different from false [2021-11-25 19:01:33,304 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_487 (Array Int Int)) (v_ArrVal_489 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_487) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_489) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) 0)) is different from false [2021-11-25 19:01:33,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 4 not checked. [2021-11-25 19:01:33,326 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:01:33,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453301186] [2021-11-25 19:01:33,327 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:01:33,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352373983] [2021-11-25 19:01:33,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352373983] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:01:33,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [29030696] [2021-11-25 19:01:33,330 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 19:01:33,330 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:01:33,330 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:01:33,331 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:01:33,331 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:01:33,535 INFO L354 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2021-11-25 19:01:33,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2021-11-25 19:01:33,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 42 [2021-11-25 19:01:33,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 46 [2021-11-25 19:01:33,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:33,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:33,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 70 [2021-11-25 19:01:33,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:33,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:33,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:33,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:33,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:33,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:33,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:33,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:33,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:33,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:33,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:33,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:33,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:33,892 INFO L354 Elim1Store]: treesize reduction 176, result has 0.6 percent of original size [2021-11-25 19:01:33,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 491 treesize of output 474 [2021-11-25 19:01:34,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:34,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-11-25 19:01:34,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:34,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:34,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:34,050 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:34,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-25 19:01:34,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:34,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:34,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:34,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:34,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:34,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:34,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:34,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:34,107 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-25 19:01:34,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 108 treesize of output 107 [2021-11-25 19:01:34,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:34,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:34,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:34,145 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:34,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-25 19:01:34,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:34,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:34,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:34,179 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:34,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-25 19:01:34,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:34,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:34,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:34,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:34,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:34,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:34,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:34,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:34,232 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-25 19:01:34,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 108 treesize of output 107 [2021-11-25 19:01:34,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:34,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:34,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:34,278 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:34,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-25 19:01:34,306 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:01:34,636 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1141#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 19:01:34,636 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:01:34,636 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:01:34,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-11-25 19:01:34,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249771299] [2021-11-25 19:01:34,637 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:01:34,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-25 19:01:34,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:01:34,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-25 19:01:34,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=251, Unknown=3, NotChecked=66, Total=380 [2021-11-25 19:01:34,638 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 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) [2021-11-25 19:01:35,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:01:35,004 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2021-11-25 19:01:35,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-25 19:01:35,004 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 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 [2021-11-25 19:01:35,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:01:35,006 INFO L225 Difference]: With dead ends: 58 [2021-11-25 19:01:35,006 INFO L226 Difference]: Without dead ends: 56 [2021-11-25 19:01:35,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=154, Invalid=663, Unknown=3, NotChecked=110, Total=930 [2021-11-25 19:01:35,008 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 39 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:01:35,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 23 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 71 Invalid, 0 Unknown, 61 Unchecked, 0.1s Time] [2021-11-25 19:01:35,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-25 19:01:35,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 29. [2021-11-25 19:01:35,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 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) [2021-11-25 19:01:35,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2021-11-25 19:01:35,017 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 14 [2021-11-25 19:01:35,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:01:35,017 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2021-11-25 19:01:35,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 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) [2021-11-25 19:01:35,018 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2021-11-25 19:01:35,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 19:01:35,019 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:01:35,019 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:01:35,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 19:01:35,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:01:35,232 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:01:35,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:01:35,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1815978007, now seen corresponding path program 2 times [2021-11-25 19:01:35,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:01:35,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440349139] [2021-11-25 19:01:35,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:35,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:01:35,248 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:01:35,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1205666316] [2021-11-25 19:01:35,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:01:35,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:01:35,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:01:35,250 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:01:35,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 19:01:35,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 19:01:35,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:01:35,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:01:35,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:01:35,445 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:01:35,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:01:35,493 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:01:35,493 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:01:35,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440349139] [2021-11-25 19:01:35,494 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:01:35,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205666316] [2021-11-25 19:01:35,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205666316] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:01:35,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1961616189] [2021-11-25 19:01:35,497 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:01:35,497 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:01:35,498 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:01:35,498 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:01:35,498 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:01:35,702 INFO L354 Elim1Store]: treesize reduction 185, result has 24.5 percent of original size [2021-11-25 19:01:35,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 5 case distinctions, treesize of input 34 treesize of output 76 [2021-11-25 19:01:35,991 INFO L354 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2021-11-25 19:01:35,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2021-11-25 19:01:36,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 42 [2021-11-25 19:01:36,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:36,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-11-25 19:01:36,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:36,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:36,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:36,108 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:01:36,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 62 treesize of output 55 [2021-11-25 19:01:36,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:36,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-11-25 19:01:36,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:36,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:36,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:36,177 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:36,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-25 19:01:36,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:36,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:36,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:36,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:36,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:36,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:36,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:36,257 INFO L354 Elim1Store]: treesize reduction 139, result has 9.7 percent of original size [2021-11-25 19:01:36,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 11 case distinctions, treesize of input 67 treesize of output 84 [2021-11-25 19:01:36,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:36,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:36,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:36,320 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:36,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-25 19:01:36,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:36,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:36,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:36,356 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:36,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-25 19:01:36,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:36,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:36,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:36,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:36,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:36,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:36,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:36,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:36,418 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-25 19:01:36,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 77 treesize of output 76 [2021-11-25 19:01:36,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:36,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:36,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:36,461 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:36,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-25 19:01:36,667 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:01:37,198 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1400#(and (<= 0 ~N~0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~b~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1.offset|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~b~0#1.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-25 19:01:37,198 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:01:37,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:01:37,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-25 19:01:37,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304303141] [2021-11-25 19:01:37,199 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:01:37,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 19:01:37,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:01:37,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 19:01:37,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-11-25 19:01:37,201 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 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) [2021-11-25 19:01:37,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:01:37,411 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2021-11-25 19:01:37,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 19:01:37,411 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 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 [2021-11-25 19:01:37,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:01:37,412 INFO L225 Difference]: With dead ends: 53 [2021-11-25 19:01:37,412 INFO L226 Difference]: Without dead ends: 44 [2021-11-25 19:01:37,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-11-25 19:01:37,413 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 15 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:01:37,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 30 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:01:37,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-25 19:01:37,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 27. [2021-11-25 19:01:37,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 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) [2021-11-25 19:01:37,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-11-25 19:01:37,421 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 15 [2021-11-25 19:01:37,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:01:37,421 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-11-25 19:01:37,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 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) [2021-11-25 19:01:37,422 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-11-25 19:01:37,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-25 19:01:37,423 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:01:37,423 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:01:37,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 19:01:37,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-25 19:01:37,639 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:01:37,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:01:37,639 INFO L85 PathProgramCache]: Analyzing trace with hash 592635563, now seen corresponding path program 4 times [2021-11-25 19:01:37,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:01:37,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671292708] [2021-11-25 19:01:37,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:37,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:01:37,667 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:01:37,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1915783182] [2021-11-25 19:01:37,668 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:01:37,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:01:37,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:01:37,669 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:01:37,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 19:01:37,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:01:37,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:01:37,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:01:37,880 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:01:37,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:01:37,956 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:01:37,957 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:01:37,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671292708] [2021-11-25 19:01:37,957 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:01:37,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915783182] [2021-11-25 19:01:37,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915783182] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:01:37,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1194040443] [2021-11-25 19:01:37,960 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 19:01:37,961 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:01:37,961 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:01:37,961 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:01:37,961 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:01:38,162 INFO L354 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2021-11-25 19:01:38,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2021-11-25 19:01:38,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 42 [2021-11-25 19:01:38,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 46 [2021-11-25 19:01:38,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:38,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:38,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 70 [2021-11-25 19:01:38,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:38,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:38,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:38,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:38,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:38,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:38,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:38,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:38,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:38,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:38,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:38,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:38,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:38,442 INFO L354 Elim1Store]: treesize reduction 176, result has 0.6 percent of original size [2021-11-25 19:01:38,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 480 treesize of output 472 [2021-11-25 19:01:38,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:38,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-11-25 19:01:38,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:38,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:38,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:38,586 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:38,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-25 19:01:38,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:38,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:38,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:38,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:38,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:38,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:38,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:38,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:38,638 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-25 19:01:38,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 108 treesize of output 107 [2021-11-25 19:01:38,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:38,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:38,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:38,687 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:38,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-25 19:01:38,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:38,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:38,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:38,715 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:38,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-25 19:01:38,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:38,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:38,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:38,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:38,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:38,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:38,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:38,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:38,771 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-25 19:01:38,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 108 treesize of output 107 [2021-11-25 19:01:38,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:38,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:38,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:38,815 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:38,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-25 19:01:38,842 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:01:39,150 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1640#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 19:01:39,150 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:01:39,150 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:01:39,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-25 19:01:39,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781767510] [2021-11-25 19:01:39,151 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:01:39,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 19:01:39,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:01:39,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 19:01:39,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-11-25 19:01:39,152 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 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) [2021-11-25 19:01:39,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:01:39,472 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2021-11-25 19:01:39,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 19:01:39,473 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 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 [2021-11-25 19:01:39,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:01:39,474 INFO L225 Difference]: With dead ends: 76 [2021-11-25 19:01:39,474 INFO L226 Difference]: Without dead ends: 52 [2021-11-25 19:01:39,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2021-11-25 19:01:39,476 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 48 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:01:39,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 39 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:01:39,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-25 19:01:39,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2021-11-25 19:01:39,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 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) [2021-11-25 19:01:39,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2021-11-25 19:01:39,484 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 16 [2021-11-25 19:01:39,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:01:39,485 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2021-11-25 19:01:39,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 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) [2021-11-25 19:01:39,485 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2021-11-25 19:01:39,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-25 19:01:39,486 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:01:39,486 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:01:39,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 19:01:39,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 19:01:39,699 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:01:39,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:01:39,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1741655437, now seen corresponding path program 3 times [2021-11-25 19:01:39,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:01:39,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687854320] [2021-11-25 19:01:39,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:39,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:01:39,720 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:01:39,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [888751585] [2021-11-25 19:01:39,721 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:01:39,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:01:39,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:01:39,739 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:01:39,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 19:01:39,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:01:39,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:01:39,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-25 19:01:39,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:01:40,098 INFO L354 Elim1Store]: treesize reduction 252, result has 37.8 percent of original size [2021-11-25 19:01:40,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 6 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 8 new quantified variables, introduced 19 case distinctions, treesize of input 462 treesize of output 399 [2021-11-25 19:01:40,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-11-25 19:01:40,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-11-25 19:01:40,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-25 19:01:40,282 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:01:40,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-11-25 19:01:40,324 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:01:40,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-11-25 19:01:40,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-11-25 19:01:40,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 5 [2021-11-25 19:01:40,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 19:01:40,830 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:01:40,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 19:01:41,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 19:01:41,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 11 [2021-11-25 19:01:41,326 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:41,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 17 [2021-11-25 19:01:41,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-11-25 19:01:41,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-11-25 19:01:41,655 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:01:41,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 69 [2021-11-25 19:01:41,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-25 19:01:41,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-25 19:01:42,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 19:01:42,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 19:01:42,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-11-25 19:01:42,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 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 190 treesize of output 191 [2021-11-25 19:01:42,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 19:01:42,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 19:01:42,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 19:01:42,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 19:01:42,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:42,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-11-25 19:01:42,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 19:01:42,975 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:01:42,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 63 [2021-11-25 19:01:42,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 19:01:43,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 19:01:43,179 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:01:43,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 11 [2021-11-25 19:01:43,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:43,302 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:01:43,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 34 [2021-11-25 19:01:43,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:43,314 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:43,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-11-25 19:01:43,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 19:01:43,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 19:01:43,388 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:01:43,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 60 [2021-11-25 19:01:43,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 19:01:43,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:43,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-11-25 19:01:43,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-11-25 19:01:43,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 19:01:43,503 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:43,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-11-25 19:01:43,566 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:43,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2021-11-25 19:01:43,595 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:43,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2021-11-25 19:01:43,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:43,655 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:43,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 19:01:43,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:43,697 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:43,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-25 19:01:43,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:43,737 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-25 19:01:43,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 39 [2021-11-25 19:01:43,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:43,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:43,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:43,814 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-25 19:01:43,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 53 [2021-11-25 19:01:43,986 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:01:43,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 32 [2021-11-25 19:01:44,007 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:01:44,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:01:45,045 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_236| Int) (v_ArrVal_725 Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_236| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (= (select (store (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|)) (.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 8))) (store .cse0 (+ |c_ULTIMATE.start_main_~c~0#1.offset| .cse1) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~c~0#1.offset| .cse1 (- 8))) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ |c_ULTIMATE.start_main_~b~0#1.offset| .cse1 (- 8)))))) (+ |c_ULTIMATE.start_main_~c~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_236| 8)) v_ArrVal_725) (+ |c_ULTIMATE.start_main_~c~0#1.offset| 8)) 1))) is different from false [2021-11-25 19:01:46,695 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_720 Int) (|v_ULTIMATE.start_main_~i~0#1_236| Int) (v_ArrVal_718 Int) (v_ArrVal_725 Int) (|v_ULTIMATE.start_main_~i~0#1_239| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_239| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (= (let ((.cse1 (+ |c_ULTIMATE.start_main_~c~0#1.offset| 8))) (select (store (let ((.cse2 (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 8)) v_ArrVal_718) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_239| 8)) v_ArrVal_720))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse2) |c_ULTIMATE.start_main_~c~0#1.base|))) (store .cse0 .cse1 (+ (select .cse0 |c_ULTIMATE.start_main_~c~0#1.offset|) (select .cse2 |c_ULTIMATE.start_main_~b~0#1.offset|))))) (+ |c_ULTIMATE.start_main_~c~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_236| 8)) v_ArrVal_725) .cse1)) 1) (< |v_ULTIMATE.start_main_~i~0#1_236| 2))) is different from false [2021-11-25 19:01:46,921 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_720 Int) (|v_ULTIMATE.start_main_~i~0#1_236| Int) (v_ArrVal_717 (Array Int Int)) (v_ArrVal_718 Int) (v_ArrVal_725 Int) (|v_ULTIMATE.start_main_~i~0#1_239| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_239| 2) (= (let ((.cse1 (+ |c_ULTIMATE.start_main_~c~0#1.offset| 8))) (select (store (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_717))) (let ((.cse2 (store (store (select .cse3 |c_ULTIMATE.start_main_~b~0#1.base|) (+ |c_ULTIMATE.start_main_~b~0#1.offset| 8) v_ArrVal_718) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_239| 8)) v_ArrVal_720))) (let ((.cse0 (select (store .cse3 |c_ULTIMATE.start_main_~b~0#1.base| .cse2) |c_ULTIMATE.start_main_~c~0#1.base|))) (store .cse0 .cse1 (+ (select .cse0 |c_ULTIMATE.start_main_~c~0#1.offset|) (select .cse2 |c_ULTIMATE.start_main_~b~0#1.offset|)))))) (+ |c_ULTIMATE.start_main_~c~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_236| 8)) v_ArrVal_725) .cse1)) 1) (< |v_ULTIMATE.start_main_~i~0#1_236| 2))) is different from false [2021-11-25 19:01:47,025 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2021-11-25 19:01:47,026 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:01:47,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687854320] [2021-11-25 19:01:47,026 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:01:47,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888751585] [2021-11-25 19:01:47,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888751585] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:01:47,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1414646151] [2021-11-25 19:01:47,029 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:01:47,029 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:01:47,030 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:01:47,030 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:01:47,030 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:01:47,243 INFO L354 Elim1Store]: treesize reduction 185, result has 24.5 percent of original size [2021-11-25 19:01:47,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 5 case distinctions, treesize of input 34 treesize of output 76 [2021-11-25 19:01:47,525 INFO L354 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2021-11-25 19:01:47,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2021-11-25 19:01:47,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 42 [2021-11-25 19:01:47,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:47,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-11-25 19:01:47,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:47,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:47,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:47,651 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:01:47,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 62 treesize of output 55 [2021-11-25 19:01:47,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:47,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-11-25 19:01:47,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:47,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:47,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:47,720 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:47,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-25 19:01:47,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:47,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:47,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:47,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:47,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:47,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:47,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:47,808 INFO L354 Elim1Store]: treesize reduction 144, result has 6.5 percent of original size [2021-11-25 19:01:47,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 11 case distinctions, treesize of input 67 treesize of output 79 [2021-11-25 19:01:47,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:47,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:47,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:47,862 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:47,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-25 19:01:47,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:47,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:47,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:47,898 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:47,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-25 19:01:47,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:47,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:47,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:47,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:47,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:47,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:47,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:47,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:47,980 INFO L354 Elim1Store]: treesize reduction 144, result has 6.5 percent of original size [2021-11-25 19:01:47,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 11 case distinctions, treesize of input 67 treesize of output 79 [2021-11-25 19:01:48,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:48,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:48,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:48,021 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:48,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-25 19:01:48,231 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:01:48,801 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1951#(and (<= 0 ~N~0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~b~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1.offset|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~b~0#1.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-25 19:01:48,801 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:01:48,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:01:48,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-11-25 19:01:48,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639843128] [2021-11-25 19:01:48,802 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:01:48,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-25 19:01:48,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:01:48,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-25 19:01:48,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=478, Unknown=3, NotChecked=138, Total=702 [2021-11-25 19:01:48,804 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 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) [2021-11-25 19:01:49,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:01:49,030 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-11-25 19:01:49,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 19:01:49,031 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 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 17 [2021-11-25 19:01:49,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:01:49,031 INFO L225 Difference]: With dead ends: 35 [2021-11-25 19:01:49,032 INFO L226 Difference]: Without dead ends: 33 [2021-11-25 19:01:49,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=108, Invalid=603, Unknown=3, NotChecked=156, Total=870 [2021-11-25 19:01:49,033 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:01:49,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 23 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 59 Unchecked, 0.1s Time] [2021-11-25 19:01:49,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-25 19:01:49,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2021-11-25 19:01:49,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 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) [2021-11-25 19:01:49,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-11-25 19:01:49,041 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 17 [2021-11-25 19:01:49,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:01:49,041 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-11-25 19:01:49,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 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) [2021-11-25 19:01:49,042 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-11-25 19:01:49,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 19:01:49,043 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:01:49,043 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:01:49,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 19:01:49,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:01:49,251 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:01:49,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:01:49,251 INFO L85 PathProgramCache]: Analyzing trace with hash -23895584, now seen corresponding path program 5 times [2021-11-25 19:01:49,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:01:49,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261202816] [2021-11-25 19:01:49,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:49,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:01:49,284 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:01:49,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [416303340] [2021-11-25 19:01:49,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:01:49,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:01:49,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:01:49,287 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:01:49,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 19:01:49,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 19:01:49,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:01:49,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:01:49,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:01:49,670 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 19:01:49,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:01:49,755 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 19:01:49,755 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:01:49,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261202816] [2021-11-25 19:01:49,755 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:01:49,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416303340] [2021-11-25 19:01:49,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416303340] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:01:49,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [121149410] [2021-11-25 19:01:49,758 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 19:01:49,758 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:01:49,758 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:01:49,759 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:01:49,759 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:01:49,982 INFO L354 Elim1Store]: treesize reduction 185, result has 24.5 percent of original size [2021-11-25 19:01:49,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 5 case distinctions, treesize of input 34 treesize of output 76 [2021-11-25 19:01:50,272 INFO L354 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2021-11-25 19:01:50,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2021-11-25 19:01:50,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 42 [2021-11-25 19:01:50,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:50,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-11-25 19:01:50,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:50,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:50,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:50,379 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:01:50,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 62 treesize of output 55 [2021-11-25 19:01:50,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:50,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-11-25 19:01:50,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:50,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:50,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:50,443 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:50,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-25 19:01:50,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:50,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:50,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:50,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:50,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:50,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:50,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:50,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:50,514 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-25 19:01:50,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 77 treesize of output 76 [2021-11-25 19:01:50,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:50,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:50,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:50,554 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:50,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-25 19:01:50,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:50,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:50,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:50,587 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:50,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-25 19:01:50,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:50,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:50,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:50,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:50,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:50,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:50,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:50,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:50,643 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-25 19:01:50,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 77 treesize of output 76 [2021-11-25 19:01:50,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:50,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:50,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:50,684 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:50,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-25 19:01:50,713 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:01:51,039 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2194#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~b~0#1.offset|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1.offset|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-25 19:01:51,039 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:01:51,039 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:01:51,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-25 19:01:51,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469161471] [2021-11-25 19:01:51,040 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:01:51,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-25 19:01:51,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:01:51,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-25 19:01:51,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-11-25 19:01:51,041 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 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) [2021-11-25 19:01:51,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:01:51,427 INFO L93 Difference]: Finished difference Result 102 states and 119 transitions. [2021-11-25 19:01:51,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-25 19:01:51,427 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 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 18 [2021-11-25 19:01:51,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:01:51,428 INFO L225 Difference]: With dead ends: 102 [2021-11-25 19:01:51,428 INFO L226 Difference]: Without dead ends: 87 [2021-11-25 19:01:51,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=261, Invalid=929, Unknown=0, NotChecked=0, Total=1190 [2021-11-25 19:01:51,430 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 92 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:01:51,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 55 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:01:51,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-25 19:01:51,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 51. [2021-11-25 19:01:51,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.26) internal successors, (63), 50 states have internal predecessors, (63), 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) [2021-11-25 19:01:51,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2021-11-25 19:01:51,443 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 18 [2021-11-25 19:01:51,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:01:51,443 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2021-11-25 19:01:51,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 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) [2021-11-25 19:01:51,444 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2021-11-25 19:01:51,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 19:01:51,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:01:51,445 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:01:51,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 19:01:51,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 19:01:51,651 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:01:51,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:01:51,651 INFO L85 PathProgramCache]: Analyzing trace with hash -190940936, now seen corresponding path program 4 times [2021-11-25 19:01:51,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:01:51,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666207993] [2021-11-25 19:01:51,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:51,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:01:51,673 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:01:51,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [93510399] [2021-11-25 19:01:51,673 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:01:51,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:01:51,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:01:51,687 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:01:51,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 19:01:51,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:01:51,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:01:51,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:01:51,892 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 19:01:51,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:01:51,967 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 19:01:51,967 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:01:51,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666207993] [2021-11-25 19:01:51,967 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:01:51,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93510399] [2021-11-25 19:01:51,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93510399] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:01:51,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1618395957] [2021-11-25 19:01:51,969 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:01:51,970 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:01:51,970 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:01:51,970 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:01:51,970 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:01:52,154 INFO L354 Elim1Store]: treesize reduction 185, result has 24.5 percent of original size [2021-11-25 19:01:52,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 5 case distinctions, treesize of input 34 treesize of output 76 [2021-11-25 19:01:52,402 INFO L354 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2021-11-25 19:01:52,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2021-11-25 19:01:52,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 42 [2021-11-25 19:01:52,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:52,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-11-25 19:01:52,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:52,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:52,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:52,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:01:52,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 62 treesize of output 55 [2021-11-25 19:01:52,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:52,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-11-25 19:01:52,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:52,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:52,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:52,563 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:52,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-25 19:01:52,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:52,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:52,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:52,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:52,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:52,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:52,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:52,675 INFO L354 Elim1Store]: treesize reduction 139, result has 9.7 percent of original size [2021-11-25 19:01:52,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 11 case distinctions, treesize of input 67 treesize of output 84 [2021-11-25 19:01:52,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:52,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:52,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:52,724 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:52,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-25 19:01:52,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:52,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:52,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:52,758 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:52,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-25 19:01:52,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:52,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:52,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:52,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:52,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:52,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:52,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:52,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:52,811 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-25 19:01:52,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 77 treesize of output 76 [2021-11-25 19:01:52,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:52,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:52,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:52,850 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:01:52,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-25 19:01:53,031 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:01:53,593 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2590#(and (<= 0 ~N~0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~b~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1.offset|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~b~0#1.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-25 19:01:53,593 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:01:53,593 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:01:53,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-25 19:01:53,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846719053] [2021-11-25 19:01:53,594 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:01:53,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 19:01:53,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:01:53,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 19:01:53,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-11-25 19:01:53,595 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 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) [2021-11-25 19:01:53,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:01:53,813 INFO L93 Difference]: Finished difference Result 81 states and 91 transitions. [2021-11-25 19:01:53,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 19:01:53,814 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 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 19 [2021-11-25 19:01:53,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:01:53,815 INFO L225 Difference]: With dead ends: 81 [2021-11-25 19:01:53,815 INFO L226 Difference]: Without dead ends: 63 [2021-11-25 19:01:53,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-11-25 19:01:53,816 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 25 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:01:53,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 52 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:01:53,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-25 19:01:53,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2021-11-25 19:01:53,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 states have internal predecessors, (53), 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) [2021-11-25 19:01:53,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-11-25 19:01:53,828 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 19 [2021-11-25 19:01:53,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:01:53,829 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-11-25 19:01:53,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 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) [2021-11-25 19:01:53,829 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-11-25 19:01:53,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 19:01:53,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:01:53,830 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:01:53,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-25 19:01:54,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 19:01:54,035 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:01:54,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:01:54,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1837651189, now seen corresponding path program 5 times [2021-11-25 19:01:54,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:01:54,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849806406] [2021-11-25 19:01:54,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:54,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:01:54,062 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:01:54,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1661259886] [2021-11-25 19:01:54,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:01:54,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:01:54,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:01:54,064 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:01:54,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 19:01:54,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 19:01:54,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-11-25 19:01:54,250 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-25 19:01:54,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 19:01:54,317 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-25 19:01:54,317 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-25 19:01:54,319 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 19:01:54,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-25 19:01:54,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 19:01:54,550 INFO L732 BasicCegarLoop]: Path program histogram: [5, 5, 1, 1, 1, 1] [2021-11-25 19:01:54,554 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 19:01:54,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 07:01:54 BoogieIcfgContainer [2021-11-25 19:01:54,596 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 19:01:54,597 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 19:01:54,597 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 19:01:54,597 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 19:01:54,598 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:01:15" (3/4) ... [2021-11-25 19:01:54,600 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-25 19:01:54,665 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eafb548-f881-4203-8d68-5df7a5e5c1f0/bin/utaipan-eEHZpOm5b7/witness.graphml [2021-11-25 19:01:54,665 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 19:01:54,666 INFO L158 Benchmark]: Toolchain (without parser) took 39726.60ms. Allocated memory was 98.6MB in the beginning and 151.0MB in the end (delta: 52.4MB). Free memory was 63.7MB in the beginning and 58.0MB in the end (delta: 5.6MB). Peak memory consumption was 58.9MB. Max. memory is 16.1GB. [2021-11-25 19:01:54,667 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 98.6MB. Free memory was 68.6MB in the beginning and 68.6MB in the end (delta: 21.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:01:54,667 INFO L158 Benchmark]: CACSL2BoogieTranslator took 445.66ms. Allocated memory is still 98.6MB. Free memory was 63.5MB in the beginning and 74.9MB in the end (delta: -11.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 19:01:54,667 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.31ms. Allocated memory is still 98.6MB. Free memory was 74.9MB in the beginning and 73.0MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 19:01:54,668 INFO L158 Benchmark]: Boogie Preprocessor took 43.53ms. Allocated memory is still 98.6MB. Free memory was 73.0MB in the beginning and 71.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 19:01:54,668 INFO L158 Benchmark]: RCFGBuilder took 436.33ms. Allocated memory is still 98.6MB. Free memory was 71.8MB in the beginning and 58.8MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-25 19:01:54,669 INFO L158 Benchmark]: TraceAbstraction took 38662.30ms. Allocated memory was 98.6MB in the beginning and 151.0MB in the end (delta: 52.4MB). Free memory was 58.3MB in the beginning and 61.2MB in the end (delta: -2.9MB). Peak memory consumption was 51.5MB. Max. memory is 16.1GB. [2021-11-25 19:01:54,669 INFO L158 Benchmark]: Witness Printer took 68.91ms. Allocated memory is still 151.0MB. Free memory was 61.2MB in the beginning and 58.0MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-25 19:01:54,672 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 98.6MB. Free memory was 68.6MB in the beginning and 68.6MB in the end (delta: 21.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 445.66ms. Allocated memory is still 98.6MB. Free memory was 63.5MB in the beginning and 74.9MB in the end (delta: -11.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 61.31ms. Allocated memory is still 98.6MB. Free memory was 74.9MB in the beginning and 73.0MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 43.53ms. Allocated memory is still 98.6MB. Free memory was 73.0MB in the beginning and 71.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 436.33ms. Allocated memory is still 98.6MB. Free memory was 71.8MB in the beginning and 58.8MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 38662.30ms. Allocated memory was 98.6MB in the beginning and 151.0MB in the end (delta: 52.4MB). Free memory was 58.3MB in the beginning and 61.2MB in the end (delta: -2.9MB). Peak memory consumption was 51.5MB. Max. memory is 16.1GB. * Witness Printer took 68.91ms. Allocated memory is still 151.0MB. Free memory was 61.2MB in the beginning and 58.0MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L30] long long *c = malloc(sizeof(long long)*N); [L32] a[0] = 6 [L33] b[0] = 1 [L34] c[0] = 0 [L36] i=1 VAL [a={-2:0}, b={4:0}, c={-1:0}, i=1, N=3] [L36] COND TRUE i